1. Determine the sample size to survey the customers of a store in a mall, if...

1. Determine the sample size to survey the customers of a store in a mall, if there are 500 customers out of 11,000 that are in the stores of the corporation. Assume that the confidence level is 95% and the accepted margin of error is 0.05.

2. Determine the sample size from the previous exercise, assuming that the customer sample was taken from department stores where there are a total of 200 customers.

Solutions

Expert Solution

orchestra answered 1 year ago

Next > < Previous

Related Solutions

an electronics store sends out a survey to seven new customers to determine if they are...

an electronics store sends out a survey to seven new customers to determine if they are satisfied with their purchase. Assume the probability a customer will be satisfied is 0.7. a. What is the mean number of customers that will be satisfied? b. What is the standard deviation of the number of customers satisfied? 4. What is the probability of exactly five customers being satisfied? c. What is the probability of at least one customer being satisfied? (Hint: use the...

1. At store A, the sample average amount spent by a random sample of 32 customers...

1. At store A, the sample average amount spent by a random sample of 32 customers was $31.22 with a sample standard deviation of $6.48. At store B, the sample average amount spent by a random sample of 36 customers was $34.68 with a sample standard deviation of $5.15. Test, using the 4-step procedure and a 5% level of significance, whether or not there is a difference between the population mean amount spent per customer at store A and the...

1. A sample of customers in a grocery store were asked the amount they spent at...

1. A sample of customers in a grocery store were asked the amount they spent at the grocery store and the number of household members for whom they currently shopped. The results are summarized in the table below: Number of Household Members (x) Dollar Amount Spent on Groceries (y) 5 135 2 49 2 50 1 37 4 91 3 68 5 133 3 60 Find the correlation coefficient for the number of household members versus the dollar amount spent...

1. In a survey of U.S. adults with a sample size of 2004, 345 said Franklin...

1. In a survey of U.S. adults with a sample size of 2004, 345 said Franklin Roosevelt was the best president since World War II. TwoTwo U.S. Two adults are selected at random from this sample without replacement. Complete parts (a) through (d). (a) Find the probability that both adults say Franklin Roosevelt was the best president since World War II. (b) Find the probability that neither adult says Franklin Roosevelt was the best president since World War II. (c)...

1. A survey administered to a random sample from a local grocery store finds that political...

1. A survey administered to a random sample from a local grocery store finds that political party is related to whether or not they favor an increase in sales tax, leading to a news story: Republicans support proposed tax increase. This is an example of what type of statistic? 2. What are measures of central tendency? When is each appropriate? What influences each measure of central tendency? (ex. What is affected by every score in the distribution? If you change...

A pet store completed a survey of customers regarding pet preferences and ownership. The results for...

A pet store completed a survey of customers regarding pet preferences and ownership. The results for dog ownership and feelings about cats are displayed in the table. Use them to answer the following questions. Likes cats & Owns a dog =13 Likes cats & does not own a dog= 30 Total=43 Dislikes cats & owns a dog=18 Dislikes cats & does not own a dog=18 Total=36 No opinion about cats & owns a dog= 0 No opinion about cats &...

. A quality survey asked recent customers of their experience at a local department store. One...

. A quality survey asked recent customers of their experience at a local department store. One question asked for the customers rating on their service using categorical responses of average, outstanding, and exceptional. Another question asked for the applicant’s education level with categorical responses of Some HS, HS Grad, Some College, and College Grad. The sample data below are for 700 customers who recently visited the department store. Education Quality Rating Some HS HS Grad Some College College Grad Average...

When the results of a survey or poll are published, the sample size and the margin...

When the results of a survey or poll are published, the sample size and the margin of error are both given. For example: 1000 voters were surveyed and 39±2% of the voters agree with the president. In this example N=1000 and the margin of error (MoE) is 2%. This website lists several public opinion polls. Search the site and find a poll where the sample size and margin of error are given. Try to find a poll dealing with a...

When the results of a survey or a poll are published, the sample size is usually...

When the results of a survey or a poll are published, the sample size is usually given, as well as the margin of error. For example, suppose the Honolulu Star Bulletin reported that it surveyed 385 Honolulu residents and 78% said they favor mandatory jail sentences for people convicted of driving under the influence of drugs or alcohol (with margin of error of 3 percentage points in either direction). Usually the confidence level of the interval is not given, but...

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.)

Subjects