Questions

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

Use the magnitudes Richter scale of the 120 earthquakes listed in the accompanying data table Use technology to find the range variance and standard deviation another value 7 50 is added to those listed in the data set do the measures of variation change much Click the icon to view the table of magnitudes Without the extra data value the range is Type an integer or decimal rounded to three decimal places as needed

3x 2 d limx 2x 1

a limx c limo e lim 0 e x e e 1 tan x In 1 x 1 b lim 0 sin x d limo 1 In z f limx 2 1

x 2x b limx 0x 2x

11 3 2 m through the point 0 6

f lim o sin x cos

limx x cos

3 Find a function f such that dom f R f 0 4 but limr o f x 2 Is it possible to find such f continuous falloring