A pizza delivery driver, always trying to increase tips, runs an experiment on his next 40 deliveries. He flips a coin to decide whether or not to call a customer fromhis mobile phone when he is five minutes away, hoping this slight bump in customer service will lead to a slight bump in tips. After 40 deliveries, he will compare theaverage tip percentage between the customers he called and those he did not. List the factor, the levels, and the response variable.What are the factor and the levels?The factor isThe levels areWhat is the response variable?The tip percentage for each deliverywhether the customer was called or not.The order size for the 40 deliveriesWhether the customer was called or notthe amount of tip received.The amount of tip for each deliverythe percentage of tip received.whether the customer picked up the phone or not.OO OO A pizza delivery driver, always trying to increase tips, runs an experiment on his next 40 deliveries. He flips a coin to decide whether or not to call a customer fromhis mobile phone when he is five minutes away, hoping this slight bump in customer service will lead to a slight bump in tips. After 40 deliveries, he will compare theaverage tip percentage between the customers he called and those he did not. List the factor, the levels, and the response variable.What are the factor and the levels?The factor isThe levels areWhat is the reThe tip |tip percentage.The ordWhethecalling the customer.The amorder size. .O O O O

Answered: A pizza delivery driver, always trying…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Camden read about a study in which 200 vegetarians were asked to sample a fruit bar. The study reported that 170 of the 200 vegetarians surveyed disliked the bar. The study had a margin of error of 4%. Which statement can be concluded from this report? A. It is likely that between 81% and 89% of vegetarians will dislike the fruit bar. B. It is likely that between 81% and 89% of people will dislike the fruit bar. C. Approximately 85% of people who like fruit will dislike the fruit bar. D. Approximately 85% of people surveyed do not like fruit.
A drug company claims that an allergy medication causes headaches in 5% of those who take it. A medical researcher believes that more than 5% of those who take the drug actually get headaches. Identify the population(s). more than 5% of those who take the drug actually get headaches. the proportion of those who take the drug who get a headache. 5% of those who take the drug actually get headaches. all individuals who take the medication. What is the variable being examined for individuals in the population(s)? more than 5% of those who take the drug actually get headaches. the proportion of those who take the drug who get a headache. whether or not a person who takes the drug gets a headache. 5% of those who take the drug actually get headaches. Is it categorical or quantitative? Quantitative Categorical Identify the parameter(s). the mean of those who take the drug who get a headache. the proportion of those who take the drug who get a headache. all individuals who…
In a statistics activity, students are asked to spin a penny and a dime and determine the proportion of times that each lands with tails up. The students believe that since a dime is lighter, it will have a lower proportion of times landing tails up compared with the penny. The students are instructed to spin the penny and the dime 30 times and record the number of times each lands tails up. For one student, the penny lands tails side up 18 times, and the dime lands tails side up 20 times. Let pp = the true proportion of times a dime will land tails up and pp = the true proportion of times a penny will land tails up. The P-value for this significance test is 0.296. Which of the following is the correct conclusion for this test of the hypotheses H Pp-Pp=0 and H, Po-Pp 0.05. There is sufficient evidence that the true proportion of times a dime will land tails up is significantly less than the penny. O The student should reject the null hypothesis since 0.296 > 0.05. There is insufficient…
Joselyn hopes to receive a grade of B or better in her statistics class. Currently she has scored 75, 83, and 81 on her three in-class tests and also has a homework average of 88. Her professor calculates the class grade by finding the mean of five grades: three in-class tests, the homework average and the final exam. What is the minimum score Joselyn must earn on the final exam to have a class grade (mean) of 80? A. 67 B. 95 C. 70 D. 73
A sample has a mean of 230 and a median of 290. If one person with a score of 10 is removed from this sample, which of the following is most likely? The mean and median will decrease equally. The mean will certainly stay the same, but the median will either decrease or stay the same. The mean will certainly increase. The median might also increase, but not as much as the mean. The mean will not change, but the median will likely increase. The mean will certainly decrease. The median might also decrease, but not as much as the mean. The mean and median will increase equally. The mean will certainly increase, and the median will likely decrease.
In 2016 the Better Business Bureau settled 84% of complaints they received in the United States. Suppose you have been hired by the Better Business Bureau to investigate the complaints they received this year involving new car dealers. You plan to select a sample of new car dealer complaints to estimate the proportion of complaints the Better Business Bureau is able to settle. Assume the population proportion of complaints settled for new car dealers is 0.84, the same as the overall proportion of complaints settled in 2016. Use the z-table. a. Suppose you select a sample of 200 complaints involving new car dealers. Show the sampling distribution of p. E(p) (to 2 decimals) (to 4 decimals) b. Based upon a sample of 200 complaints, what is the probability that the sample proportion will be within 0.04 of the population proportion (to 4 decimals)? probability : = c. Suppose you select a sample of 460 complaints involving new car dealers. Show the sampling distribution of p. E(F) (to 2…
See picture for questions A and b Michael, a nurse manager at a local hospital, wanted to know more about the hospital's full-time nurses. He polled 12 nurses at random who work full-time at the hospital. The findings in the poll were that these nurses take, on average, 5.5. sick days per year, that 50% of them would prefer a four-day work schedule, and that 8 of them are married. Michael didn't know that the top hospital administrators had already surveyed all nurses who work full-time at the hospital. In that survey, it was found that the nurses take, on average, 5.7 sick days per year, that 61% of them would prefer a four-day work schedule, and that 77 of them are married.
The highest score in a distribution is 74 and the lowest score is 51. What is the range?
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