Questions

1 point The mean of a set of normally distributed data is 600 with a standard deviation of 20 What percent of the data is between 580 and 620 50 34 68 95

10 1 point Which is an example of a continuous random variable Number of employees Defective pens Height of all sophomores Teachers at the conference 00

1 point The number of hours that college students sleep on a week night is approximated by a normal curve with a mean of 7 hours and a standard deviation of 1 7 hours Answer the question below using a z table About what proportion of students sleep less than 5 hours on a week night round to whole number About 16 About 32 About 24 About 12 Ne

2 You are studying abroad in Paris for the semester where measurements are made using the metric system Answer the following questions that involve unit conversions between metric and USCS units Show your work and make sure your final answer has appropriate units U 03 a One day while you are out window shopping you find a pair of jeans that you really like that cost 75 Euro You decide that on your budget you can t afford to pay more than 80 for the jeans Perform a calculation that will let you determine the cost of the jeans in dollars if 1 0 877 Euro Then decide whether or not the jeans are in your budget b You brought your favorite chicken parmesan recipe along with you to Paris and want to cook it for your host family The recipe calls for 1 5 pounds of chicken cutlets How many kilograms of chicken will you need to buy to make the recipe 3 On April 3 2007 the Alstom V150 a European TGV train set the current world record for high speed rail transit at 574 8 km h How fast is this in miles per hour Show your work and make sure your final answer has appropriate units U 03

According to the box and whisker plot shown what is the value of quartile 3 Items Sold Each Month 30 50 30 41 35 40 45 50 55 60 65

Rhonda plans to buy an 85 Father s Day present for her father and the holiday falls on the third Sunday of June She can afford to put it on layaway with a 20 down payment and 8 a month after that If payments are due at the beginning of each month when should Rhonda make her first monthly payment A November 1 OB September 1 C December 1 OD October 1

Which of the following corresponds to the case when every sample of size n has the same chance of being chosen Choose the correct answer below 00 Probability sample Random sample Simple random sample ILE Poin

Brooke took out a 4 year loan for 1825 at a computer store to be paid back with monthly payments at a 12 5 APR If the loan offers no payments for the first 17 months how many payments will Brooke be required to make A 31 B 48 C 65 D 17

7 1 point Rob and Jim are used car salesmen Below are histograms representing the number of cars per week each man sold over 14 weeks Based on the histograms Jim sold more cars than Rob 7 True False Rob s Car Sales 4 7 6 12 Jim s Car Sales 1 1 4 5 T 6

n 3 2 2 2 Additional Practice Point Slope Form Graph the line that represents each linear equation 1 y 2 2 x 3 2 y 3 2 x 1 7 4 0 and 2 1 170 1 6 Write the equation in point slope form of the line that passes through the given point with the given slope 4 2 1 m 3 6 4 11 m 3 5 3 5 m 2 2 4 Y 0 x x enVision HW Write an equation in point slope form of the line that passes through the given points 8 3 2 and 5 3 3 y 1 x 5 9 5 1 and 3 4 10 Explain why it does not matter which point you choose when writing the equation of the line in point slope form given two points 11 Members of the student council are conducting a fundraiser by selling school calendars After selling 80 calendars they had a loss of 360 After selling 200 calendars they had a profit of 600 Write an equation that describes the relation between y the profit or loss and x the number of calendars sold How much profit did they make from selling each calendar How much would they have lost if they had sold no calendars

Point Slope Form Point slope form y y m x x An equation of a line can be written in point slope form given any point on the line and the slope of the line Support Problem A line passes through 1 3 and has slope 2 Find an equation of the line Explain your steps Step y y m x x y 3 2 x 1 y 3 2 x 1 Step y y m x x y 4 x 3 y 4 x 3 Written Explanation Use the point slope form Substitute 1 for x 3 for y and 2 for m Simplify inside grouping symbols Exercises A line passes through 3 4 and has slope 1 Find an equation of the line Explain your steps Written Explanation

4 1 point What is the range of this data set 18 20 22 11 19 18 18 12 10 18 11 Previous

Carmine took out a 28 year loan for 151 000 at an APR of 9 9 compounded monthly while Richie took out a 28 year loan for 116 000 at an APR of 9 9 compounded monthly Who would save more by paying off his loan 17 years early A Richie would save more since he has 35 000 less in principal B Carmine would save more since he has 35 000 more in principal C Richie would save more since he has 35 000 more in principal D Carmine would save more since he has 35 000 less in principal

3 1 point What is the interquartile range of the data set 456 234 567 123 345 567 890 567 234 277 5 289 5 567 Previou

7 1 point What is the median of the stem and leaf plot shown Stem Leaf 3 4566 4 5688 5 234 6 0234 52 48 46

14 1 point Identify a potential source of bias if any DA Using random digit dialing 1599 people were called and asked what obstacles such as childcare kept them from exercising Source Yankelovich Partners Inc for Shape Up America No source of bias Maybe they don t have children Not asking enough people Using the word obstacles

13 1 point What is the population of the following scenario Mrs Doe wants to determine if Coca Cola really fills its cans with 12 ounces of Coca Cola She randomly selects 100 cans of Coca Cola and measures the number of ounces in each can She finds the average of the 100 cans of Coca Cola to be 12 01 ounces 12 01 ounces in a can of Coca Cola 100 cans of Coca Cola All cans of Coca Cola 12 ounces in a can of Coca Cola Next

17 1 point What is the sample in the following scenario Mrs Doe wants to determine if Coca Cola really fills its cans with 12 ounces of Coca Cola She randomly selects 100 cans of Coca Cola and measures the number of ounces in each can She finds the average of the 100 cans of Coca Cola to be 12 01 ounces 12 ounces in a can of Coca Cola 12 01 ounces in a can of Coca Cola All cans of Coca Cola 100 cans of Coca Cola 000 0 Next

Today Benjamin put a watch on layaway by making a down payment of 65 and agreeing to pay 12 per month starting next month for 15 months When will Benjamin receive the watch A In 12 months OB In 15 months OC Today D In 1 month

16 1 point Which type of study contains a treatment Sample Survey Observational Study Experiment Previous

Which sampling method subdivides the population into categories sharing similar characteristics and then selects a sample from each subdivision Choose the correct answer below Convenience Systematic Stratified Points 0 of 1 COLLA

3 3 4 5 6 7 18 15 1 point Which data is quantitative Ethnicity Length of employment Type of Pets owned Rent or own home Previous

Jerry bought a table tennis table with a sticker price of 1700 If he paid 2 a week for 2 years what was the approximate markup rate on the table O O A 32 7 B 74 3 C 67 3 D 34 6

This is an Determine whether the study is an experiment or an observational study and then identify a major problem with the study A medical researcher tested for a difference in systolic blood pressure levels between male and female students who are 12 years of age She randomly selected four males and four females for her study experiment because the researcher Part 1 of 2 observational study Points 0 of 1 the individuals

A study is conducted to measure children s growth rates without any treatment applied to the children What best classifies this study Choose the correct answer below Discrete data Observational study Simple random sample Experiment

Which sampling method divides the population up into sections randomly selects some of those sections then chooses all the members from the selected sections to study Choose the correct answer below Convenience Stratified Systematic Cluster Points 0 of 1 EXC

Identify which of these types of sampling is used random systematic convenience stratified or cluster To determine her blood sugar level Samantha divides up her day into three parts morning afternoon and evening She then measures her blood sugar level at 4 randomly selected times during each part of the day What type of sampling is used OOOO O Random O Systematic Convenience Stratified Save CELE

Fill in the blank is used when subjects are assigned to different groups through a process of random selection Randomization Observation is used when subjects are assigned to different groups through a process of random selection Confounding

In a study designed to test the effectiveness of a medication as a treatment for lower back pain 1643 patients were randomly assigned to one of three groups 1 the 547 subjects in the placebo group were given pills containing no medication 2 550 subjects were in a group given pills with the medication taken at regular intervals 3 546 subjects were in a group given pills with the medication to be taken when needed for pain relief In what specific way was replication applied in the study Choose the correct answer below CEL OA The group sample sizes are all large so the researchers could see the effects of the treatment OB The subjects in the study did not know whether they were taking a placebo or the medication OC The subjects were divided into three groups so the researchers could compare the effects of the different treatments OD The researchers did not know whether the subjects in the study were taking a placebo or the medication

O Points 0 of 1 Which sampling method divides the population up into sections randomly selects some of those sections then chooses all the members from the selected sections to study Choose the correct answer below O Convenience O Stratified O Systematic O Cluster

Janie took out a loan for 4850 at a 13 8 APR compounded monthly to buy a backyard swimming pool If she will make monthly payments of 455 50 to pay off the loan how many total payments will she have to make A 13 OB 10 C 12 OD 11

Question 11 1 3 30 Sentify the type of observational study researcher plans to obtain data by examining the financial transactions of victims who erished in a tornado Choose the correct type of observational study below A retrospective B prospective OC cross sectional GETTIN HW Score 0 0 of 16 points O Points 0 of 1

Identify which of these types of sampling is used random systematic convenience stratified or cluster A market researcher has partitioned all residents of a certain region into categories of young age 0 30 middle aged age 31 60 and senior over age 60 She is surveying 54 people from each category What type of sampling is used O cluster sampling convenience sampling O random sampling systematic sampling O stratified sampling

11 1 point Normal distribution models what type of variable random continuous variable random variable Odiscrete random variable discrete continuous variable Previous

Determine whether the description corresponds to an observational study or an experiment Research is conducted to determine if there is a relation between brain cancer and use of cell phones Does the description correspond to an observational study or an experiment O Experiment O Observational study EO

Identify which type of sampling is used random systematic convenience stratified or cluster To determine customer opinion of their pricing Amtrak randomly selects 30 trains during a certain week and surveys all passengers on the trains Which type of sampling is used OA Random OB Cluster OC Stratified OD Convenience OE Systematic EXCE

12 1 point The mean of a set of normally distributed data is 600 with a standard deviation of 20 What percent of the data is between 580 and 620 95 68 DED 50

8 1 point The finishing times of two runners for several one mile races in minutes are shown in the box and whisker plots Runner 1 65 75 is Runner 2 Based on the box plots runner 1 has a faster median time True False

10 1 point The total area under the normal distribution curve is equal to a probability of 99 8 Can t tell because it is infinite O O 0 100

5 1 point What is the range of the data set 97 85 92 86 7 O 12 Q 11 5

4 1 point What is the IQR of the set of the data below 95 92 96 93 94 95 93 2 94 5 4 Previous

6 1 point What is the interquartile range of the data set 456 234 567 123 345 567 890 567 567 289 5 277 5 234

3 1 point What is the mean of this data set 38 52 54 48 40 32 22 O O O 44 50 11 Previous

Donna took out a 25 year loan for 115 000 at an APR of 7 2 compoundec monthly and she is making monthly payments of 827 53 What will her balance be with 15 years left on the loan OA 70 643 14 OB 90 932 36 C 112 848 16 D 113 587 00

Researchers conducted a study to determine whether magnets are effective in treating back pain Pain was measured using the visual analog scale and the results given below are among the results obtained in the study Higher scores correspond to greater pain levels Is this study an experiment or an observational study Explain Reduction in Pain Level After Magnet Treatment n 20 x 0 488 s 0 958 Reduction in Pain Level After Sham Treatment n 20 x 0 437 s 1 42 Choose the correct answer below OA The study is an experiment because the subjects are a systematic sample OB The study is an experiment because subjects were given treatments OC The study is an observational study because there was no attempt to modify the individuals being studied OD The study is an observational study because the subjects are a simple random sample

A manufacturing company produces valves in various sizes and shapes One particular valve plate is supposed to have a tensile strength of 5 pounds per millimeter lbs mm The company tests a random sample of 42 such valve plates from a lot of 650 valve plates The sample mean is a tensile strength of 5 0611 lbs mm and the population standard deviation is 0 2803 lbs mm Use a 0 10 and test to determine whether the lot of valve plates has an average tensile strength of 5 lbs mm

Nevaeh took out a 20 year loan for 155 000 at 3 6 interest compounded monthly If her monthly payment on the loan is 906 93 how much of her first payment went toward note reduction OA 465 00 OB 441 93 OC 906 93 OD 326 49

1 1 point What is the median of this set of data 65 84 73 45 56 55 49 88 92 55 61 121 60 5 60

2 1 point John has earned a 77 76 and 84 on his first three projects of the semester If he hopes to have an B quiz average 80 or above what is the lowest score John can make on his fourth and final project 90 0000 He cannot earn a B project average 86 83

se the following table to evaluate the expression X 123456 f x 3 16 25 1 g x 3 5 6 2 1 4 fog 6