Question

In: Statistics and Probability

The proportion of customers who do online shopping is believed to be 0.3. A survey of49...

The proportion of customers who do online shopping is believed to be 0.3. A survey of49 customers was taken. They were asked if they did online shopping. A. What is the probability of the sample proportion to be below 0.25? B. What is the probability that the sample mean is above 0.35? C. What is the role of the central limit theorem in solving this problem?

Solutions

Expert Solution

orchestra answered 2 years ago
Next > < Previous

Related Solutions

The proportion of customers who are completely satisfied in a recent satisfaction survey of 300 customers...
The proportion of customers who are completely satisfied in a recent satisfaction survey of 300 customers at XYC Inc. is found to be 0.26. (6 points) Test the hypothesis that the population proportion of customers who are completely satisfied is greater than 0.22 using the critical value approach and a 0.05 level of significance. Test the hypothesis that the population proportion of customers who are completely satisfied is less than 0.30 using the p-value approach and a 0.05 level of...
A magazine company is planning to survey customers to determine the proportion who will renew their...
A magazine company is planning to survey customers to determine the proportion who will renew their subscription for the coming year. The magazine wants to estimate the population proportion with 95​% confidence and a margin of error equal to ±0.08. What sample size is​ required? The required sample size is customers. ​(Round up to the nearest whole number as​ needed.)
B. The proportion of customers who are completely satisfied in a recent satisfaction survey of 300...
B. The proportion of customers who are completely satisfied in a recent satisfaction survey of 300 customers at XYC Inc. is found to be 0.26. Test the hypothesis that the population proportion of customers who are completely satisfied is greater than 0.22 using the critical value approach and a 0.05 level of significance. e Test the hypothesis that the population proportion of customers who are completely satisfied is less than 0.30 using the p-value approach and a 0.05 level of...
Design a survey questionnaire that gather information on who, when, and how individuals use online shopping....
Design a survey questionnaire that gather information on who, when, and how individuals use online shopping. Ask 20 questions that provide quantity, frequency and reasons for their use, which will help you analyze the impact of online commerce on transportation and urban development.
1. It is believed that the population proportion of adults in the US who own dogs...
1. It is believed that the population proportion of adults in the US who own dogs is 0.65. I surveyed people leaving the veterinarians office and found that 96 out of 150 owned a dog. Test this hypothesis at the .05 significance level. Assume a random sample. 2. Randomly surveyed 10 employees at work for their average on how many times they use the rest room per shift. the results were as follows 2,2,3,1,0,4,1,1,0,5 the mean for this is 1.9...
An online shopping website considers offering its customers a mail-in rebate program. By this way, it...
An online shopping website considers offering its customers a mail-in rebate program. By this way, it aims to differentiate between different groups of customers. After the completion of the purchase of a wireless router, consumers can mail a rebate form to receive $ back. In other words, the net price after the rebate is p*-a for those who are interested in the mail-in-rebate. The shopping website is a monopoly with no fixed cost. Its marginal cost is $30. The Market...
An online shopping website considers offering its customers a mail-in rebate program. By this way, it...
An online shopping website considers offering its customers a mail-in rebate program. By this way, it aims to differentiate between different groups of customers. After the completion of the purchase of a wireless router, consumers can mail a rebate form to receive $ back. In other words, the net price after the rebate is p*-a for those who are interested in the mail-in-rebate. The shopping website is a monopoly with no fixed cost. Its marginal cost is $30. The Market...
It is believed that the proportion of female college students who friend-zone a study buddy is...
It is believed that the proportion of female college students who friend-zone a study buddy is about 29%. a) Say? w?e s?elected? 15 ?random co?llege females?. I?s t?his? s?amp?le ?"lar?ge e???nough"? to us??e ?the Central Limit Theorem? What about 100? Check by using the assumptions for CLT. b) Fill in the blank to write the sampling distribution when we obtain 100 females. Round to three decimal points if possible. ?̂~? (? , ?) c) Find the probability that from the...
A restaurant manager asks all of the customers this month to take an online survey (and...
A restaurant manager asks all of the customers this month to take an online survey (and get a free appetizer their next visit). It turns out that 241 customers actually take the survey, and of these 209 were ''extremely satisfied'' with their visit. Set up an approximate 95% confidence interval for the proportion of all the restaurant's customers that say they were ''extremely satisfied'' with their visit.. Select only one of the boxes below. A. The Normal curve cannot be...
1) The proportion of people at shopping mall who wear red shirts is p = 0.18....
1) The proportion of people at shopping mall who wear red shirts is p = 0.18. What is the mean of the sampling distribution given a sample size of 50? What is the standard deviation? (Central Limit Throrem). 2) What is the probability given a random sample of 50 people at shopping mall that more than 20% of them are wearing red shirts? 3) CONF. INT Suppose you take a random sample of 50 people at shopping mall and find...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT