Statistics Questions and Answers

The times it took to complete a frame of snooker were recorded at a tournament Here are the results times t mins freq f 0 t 10 11 10 t 20 30 20 t 30 45 30 t 60 14 O mid points m 0000 the mean time fm 6 mins

Two months after the first flowers appear on a runner bean plant the lengths of the beans are all measured length 1 cm freq f 0 5 6 5 10 14 10 15 22 15 25 8 mid points m 6 fm

A group of people answer the question How many times did you shop at Ascobury s last week Here are the results visits v frequency f 0 1 2 3 4 Find the m 22 4 13 18 8 7 number of visits fv 5

A cashier answers the question How many of each of these notes do you have in the till Here are the results note value v 5 10 20 50 frequency fv f 27 25 36 12 Find the mean note value 0000 5

The data below was collected from manufacturer advertisements of their vehicles horsepower and highway gas mileage mpg Use this data to answer the following questions X y 190 220 158 250 340 350 390 15 17 11 35 42 33 28 1 Find the the correlation coefficient Round your final answer to four decimal places T 2 Write the regression equation below Round all numbers to four decimal places y 3 Using the data shown above predict the the highway gas mileage mpg for a car that has a horsepower of 225 Round your final answer to two decimal places 4 What percentage of variation in highway gas mileage mpg can be explained by horsepower Round your final answer to two decimal places

The average resting heart rate of a population is 86 beats per minute with a standard deviation of 10 5 bpm Find the z scores that correspond to each of the following heart rates Round your answers to the nearest hundredth if necessary a 112 bpm Z b 67 bpm Z

Question 2 0 6 pts 100 Pizza Co has recently received complaints about the inconsistent amount of cheese on their pizza Michelle the manager finds that the amount of cheese on a slice of pizza is uniformly distributed 6 ounces a Find the probability that there is less than 2 5 ounces of cheese on a slice of pizza Round to 3 places b Find the probability that there is at least 4 ounces of cheese on a slice of pizza Round to 3 dec places c Find the probability that there is between 2 75 to 3 25 ounces of cheese on a slice of pizza Ro decimal places d Find the 70th percentile for the amount of cheese on a slice of pizza This is the amount of ch is more than 70 of the of all slices e Find the average amount of cheese on a slice of pizza Round to 3 decimal places f Find the standard deviation for the amount of cheese on a slice of pizza Round to 3 decimal pl

The following table shows results from a Polsson GLM generalized linear regression model testing the vocal behaviour of barn owl siblings number of calls while at the nest in response to three predictor variables Food treatment Parent sex and arrival time and interaction terms between some of these factors Link the correct statements below based on this information Intercept FoodTreatmentSatiated Arrival Time SexParentMale FoodTreatmentSatiated SexParentMale FoodTreatmentSatiated ArrivalTime Estimate Std Error 0 292 0 011 0 018 0 021 0 070 5 169 0 654 0 221 0 121 0 129 0 001 0 019 p value 0 004 0 001 0 039 0 001 0 065 0 978 When parents arrived earlier back to the nest Food treatment is a categorical variable with two options satiated and not satiated the models predicts satiated owls to make how many calls Tested interactions explore When the female parent arrived to the nest A owl sibblings made a similar number of calls B if the effect of food treatment on the number of calls varies depending on the sex of the parent and on the time of arrival C 5 823 calls D 5 169 calls E owl sibblings made significantly fewer calls F if the effect of parent sex on the number of calls varies when depending on the time of arrival G 0 654 calls owl gibblings made plan iesail

Moussa is investigating how long his phone s battery lasts in hours for various brightness levels on a scale of 0 100 His data is displayed in the table and graph below Brightness Level x Hours y 9 8 7 6 5 4 Hours 3 2 1 10 20 30 17 6 18 28 5 2 18 6 3 5 8 42 5 4 42 45 62 3 7 5 5 3 8 40 50 60 70 80 90 100 11 Brightness Level a What is the residual for the point 45 5 5 Round to 4 decimal places

Model Toxin ng Tail mm Residuals Min 1Q Median 3Q Max 61 958 8 286 3 026 16 246 38 771 Coefficients Intercept Tail mm QUESTION 18 Estimate 25 06 0 96 Signif codes 0 0 001 0 01 Std Error 8 675 0 049 0 05 0 11 t value 2 888 19 469 The 95 confidence interval for the regression model in Question 15 is as follows 2 5 0 86 97 5 1 06 Tail mm What is the range of expected toxin values in ng for a lizard with a tail length of 200 mm

6 and 7 Quiz for ss K Que Construct a 90 confidence from two foot fe

ule 6 and 7 Quiz for class K Claim Question 15 c Test the claim about the difference betwe samples are random and independent a H H x 0 10 Assume o o

6 and 7 Quiz for iss K Question 11 of 16 The dean of a university estimates that the me member of the student council you want to tes eight full time faculty for one week is shown in parts a through d below Assume the popula 12 8 7 1 12 5

and 7 Quiz for K Question 2 of 16 A humane society claims that less than 74 of ho households in that country 420 say they own a pe claim Complete parts a through c below

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and 7 Quiz for 5 K Question 7 of 16 Identify the type I error and the type II error for The percentage of households with Internet a