Question

show step by step Sam and Hannah, own a restaurant in Edison, New Jersey, and want...

show step by step

Sam and Hannah, own a restaurant in Edison, New Jersey, and want to study the dining characteristics of their customers. They decide to focus on two variables: the amount of money spent by customers and whether customers order dessert. The results from a sample of 61 customers are as follows:

              Amount spent: Sample mean = $45.83, Sample standard deviation = $6.27

              17 out of the randomly selected 61 customers, purchased dessert.

  1. Construct a 98% confidence interval estimate for the population mean amount spent per customer in the restaurant.
  2. Construct a 90% confidence interval estimate for the population proportion of customers who purchase dessert.

Their rival Jim owns a competing restaurant. He wishes to conduct a similar survey in his restaurant. However, he does not have access to the information that Sam and Hannah have obtained from the survey they conducted. Jim wants to know the following:

  1. What sample size is needed to have 99% confidence of estimating the population mean amount spent in his restaurant to within ±$2.60, assuming that the population standard deviation is estimated to be $9?
  2. How many customers need to be selected to have 95%confidence of estimating the population proportion of customers who purchase dessert to within±0.04?
Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

ANSWER::

NOTE:: I HOPE YOUR HAPPY WITH MY ANSWER....***PLEASE SUPPORT ME WITH YOUR RATING...

***PLEASE GIVE ME "LIKE"...ITS VERY IMPORTANT FOR ME NOW....PLEASE SUPPORT ME ....THANK YOU

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A random sample of 49 lunch customers was selected at a restaurant. The average amount of...
A random sample of 49 lunch customers was selected at a restaurant. The average amount of time the customers in the sample stayed in the restaurant was 40 minutes. From past experience, it is known that the population standard deviation equals 10 minutes. a. Compute the standard error of the mean. b. Construct a 95% confidence interval for the true average amount of time customers spent in the restaurant. c. With a .95 probability, what sample size would have to...
The Roman Arches is an Italian restaurant. The manager wants to estimate the average amount a...
The Roman Arches is an Italian restaurant. The manager wants to estimate the average amount a customer spends on lunch, Monday through Friday. A random sample of 100 customers' lunch tabs gave a mean of $8.75 and a population standard deviation of $2.04. Construct a 90% confidence interval for the average amount spent on lunch by all customers.
The table below contains the amount that a sample of nine customers spent for lunch​ ($)...
The table below contains the amount that a sample of nine customers spent for lunch​ ($) at a​ fast-food restaurant. Complete parts a and b below. 4.33 5.14 5.67 6.31 7.36 7.67 8.48 8.79 9.18 a. Construct a 99​% confidence interval estimate for the population mean amount spent for lunch at a​ fast-food restaurant, assuming a normal distribution. The​ % confidence interval estimate is from ​$ nothing to ​$ nothing. ​(Round to two decimal places as​ needed.) b. Interpret the...
The table below contains the amount that a sample of nine customers spent for lunch​ ($)...
The table below contains the amount that a sample of nine customers spent for lunch​ ($) at a​ fast-food restaurant. Complete parts a and b below. 4.87 5.08 5.84 6.14 7.32 7.58 8.22 8.67 9.33 a. Construct a 95​% confidence interval estimate for the population mean amount spent for lunch at a​ fast-food restaurant, assuming a normal distribution. The​ % confidence interval estimate is from ​$??? to ​$???. ​(Round to two decimal places as​ needed.) b. Interpret the interval constructed...
A market research director at XYZ Apparels wants to study women’s spending on apparels. A survey...
A market research director at XYZ Apparels wants to study women’s spending on apparels. A survey of the store’s credit card holders is designed in order to estimate the proportion of women who purchase their apparels primarily from XYZ apparels and the mean yearly amount of money that women spend on apparels. A previous survey found that the standard deviation for the amount women spend on apparels in a year is approximately $35. a. What sample size is needed to...
2. The file FastFood contains the amount that a sample of 15 customers spent for lunch...
2. The file FastFood contains the amount that a sample of 15 customers spent for lunch ($) at a fast-food restaurants: 7.42 6.29 5.83 6.50 8.34 9.51 7.10 6.80 5.90 4.89 6.50 5.52 7.90 8.30 9.60 a. Construct 95% confidence interval estimate for the population mean amount spent for lunch ($) at a fast-food restaurant assuming a normal distribution. b. Interpret the interval constructed in (a).
4) To estimate the population proportion of a given survey, what sample size would be required...
4) To estimate the population proportion of a given survey, what sample size would be required if we want a margin of error of 0.045; a confidence level of 95%; and p and q are unknown. 5). How many cars must be randomly selected and tested in order to estimate the mean braking distance of registered cars in the US? We want a 99% confidence that the sample mean is within 2 ft of the population mean, and the population...
5. Mean of 1500, standard deviation of 300. Estimating the average SAT score, limit the margin...
5. Mean of 1500, standard deviation of 300. Estimating the average SAT score, limit the margin of error to 95% confidence interval to 25 points, how many students to sample? 6. Population proportion is 43%, would like to be 95% confident that your estimate is within 4.5% of the true population proportion. How large of a sample is required? 7. P(z<1.34) (four decimal places) 8. Candidate only wants a 2.5% margin error at a 97.5% confidence level, what size of...
In examining the credit accounts of a department store, an auditor would like to estimate the...
In examining the credit accounts of a department store, an auditor would like to estimate the true mean account error (book value – audited value). To do so, the auditor selected a random sample of 50 accounts and found the mean account error to be $60 with a standard deviation of $30. a. Construct a 95% confidence interval for the population mean account error. What conclusion can be made from this confidence interval? b. How large a sample is actually...
1. The 95% confidence interval states that 95% of the sample means of a specified sample...
1. The 95% confidence interval states that 95% of the sample means of a specified sample size selected from a population will lie within plus and minus 1.96 standard deviations of the hypothesized population mean. T or F 2. Which of the following is NOT necessary to determine how large a sample to select from a population? Multiple Choice The level of confidence in estimating the population parameter The size of the population The maximum allowable error in estimating the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT