1. (16 pts) A company reports that 80% of its employees participate in the company's stock purchase plan. A random sample of 50 employees was asked the question, "Do you participate in the stock purchase plan?" The answers are shown below. yes no no yes no no yes yes no no no yes yes yes no yes no nо yes yes yes yes yes yes yes yes yes yes yes yes no yes yes no yes yes no yes no no yes yes yes yes yes no no yes yes no YES = 32 , NO = 18 Perform the appropriate test of hypothesis to investigate your suspicion that fewer than 80% of the company's employees participate in the plan. Use a = .05.

1. (16 pts) A company reports that 80% of its employees participate in the company's stock purchase plan. A random sample of 50 employees was asked the question, "Do you participate in the stock purchase plan?" The answers are shown below. yes no no yes no no yes yes no no no yes yes yes no yes no nо yes yes yes yes yes yes yes yes yes yes yes yes no yes yes no yes yes no yes no no yes yes yes yes yes no no yes yes no YES = 32 , NO = 18 Perform the appropriate test of hypothesis to investigate your suspicion that fewer than 80% of the company's employees participate in the plan. Use a = .05.

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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An airline offers discounted "advance purchase " fares to customers who buy tickets more than 30 days before travel and charges "regular" fares for tickets purchased during those last 30 days. The company has noticed that 60% of its customers take advantage of the advance-purchase fares. The "no-show" rate among people who paid regular fares is 30%, but only 5% of customers with advance-purchase tickets are no-shows. a) What percent of all ticket holders are no-shows? b) What 's the probability that a customer who didn't show had an advance -purchase ticket? c) Is being a no-show independent of the type of ticket a passenger holds? Explain.
1. The percentage of 12- to 17-year-olds who reported talking at least once in the past year with their parents about the dangers of drug, tobacco, or alcohol is 60% nationally. A state youth council believes this proportion is higher in their state, where there has been an intense media campaign about this issue. A survey of randomly chosen students from across the state shows 1032 of 1642 students reporting they are having these conversations with their parents. Is there evidence that the percent of students using drugs, tobacco or alcohol in this state is above the national rate?
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4. In an animal experiment, three mice with dandruff in their hair are washed with hair shampoo. The mice are named Alpha, Bravo and Charlie. From many previous animal experiments, it is known that (i) Alpha, Bravo and Charlie have no dandruff after washing in 30%, 45% respectively 65% in most cases they no longer have dandruff. (ii) The shampoo on Alpha, Bravo or Charlie in 95% of the cases works.
In a study of pain relievers, 50 people were given product A, and all but 10 experienced relief. In the same study, 20 people were given product B, and all but 3 experienced relief. Fill in the blanks below to make the most reasonable statement possible. Product ▼(Choose one) performed worse in the study. That is because % failed to get relief with this product, whereas only % failed to get relief with Product ▼(Choose one).
4- An investor thinks that investment preference on "real estate" is more than "stock" investment. In order to understand the true population proportion of investors who invest the money on "real estate" 1000 investors randomly selected are asked "What is your investment preference as "real estate" or "stock"? 350 of the investors prefer "stock". Test the hypothesis that preference of stock is at least 60% at 5%? Find the correct answer for the hypothesis and find the correct answer for critical value. a) -3.31 b) 3.31 c) 13.26 -16.57 e) Ho: P<0.60 H: P 0.60 f) 16.67 Ho: P 0.60 H: P<0.60 Ho: P20.60 H: P<0.60 Ho: P 0.60 H: P+0.60 Ho: P<0.60 H:P20.60 h) i)
Es A census of all the 12,475 current students at the local community college showed that 56.5% want to transfer to a university, their average age is 21.7 years, and 60 of them are pursuing degrees in mathematics. In order to attract more students, the math department organized an "Opportunities in Mathematics" fair for current students of the college. A total of 267 students from those who attended responded to a poll. The poll showed that 83% of those who answered want to transfer to a university, the average poll respondent was 22.3 years old, and 77 them were interested in pursuing a degree in mathematics. (a) For the math fair poll, identify the population and the sample. Population: (Choose one) Sample: (Choose one) (b) Choose whether each number described below is a parameter or a statistic for the math fair poll. Number Parameter Statistic The 60 students pursuing a math degree among all the current students at the community college The 56.5% of all current students at the…
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