Question

The average selling price of a smartphone purchased by a random sample of 44 customers was...

The average selling price of a smartphone purchased by a random sample of 44 customers was ​$299. Assume the population standard deviation was ​$33.

a. Construct a 95​% confidence interval to estimate the average selling price in the population with this sample.

b. What is the margin of error for this​ interval?

a. The 95​% confidence interval has a lower limit of ​$?? and an upper limit of $??.

​(Round to the nearest cent as​ needed.)

b. The margin of error is $??.

(Round to the nearest cent as​ needed.)

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

a)

b) margin of error= (308.751-289.249)/2

= 19.502/2

9.751

please like ??

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
The average selling price of a smartphone purchased by a random sample of 41 customers was...
The average selling price of a smartphone purchased by a random sample of 41 customers was ​$323. Assume the population standard deviation was ​$33. a. Construct a 90​% confidence interval to estimate the average selling price in the population with this sample. b. What is the margin of error for this​ interval? a. The 90% confidence interval has a lower limit of ​$ nothing and an upper limit of ​$ nothing .
The average selling price of a smartphone purchased by a random sample of 41customers was ​$296....
The average selling price of a smartphone purchased by a random sample of 41customers was ​$296. Assume the population standard deviation was $34. a. Construct a 90​% confidence interval to estimate the average selling price in the population with this sample. b. What is the margin of error for this​ interval?
Banking fees have received much attention during the recent economic recession as banks look for ways...
Banking fees have received much attention during the recent economic recession as banks look for ways to recover from the crisis. A sample of 31 customers paid an average fee of ​$11.61 per month on their​ interest-bearing checking accounts. Assume the population standard deviation is ​$1.64 . Complete parts a and b below. a. Construct a 95 ​% confidence interval to estimate the average fee for the population. The 95 ​% confidence interval has a lower limit of ​$nothing and...
29. The average price of a smartphone purchased by a random sample of 36 STAT 3309...
29. The average price of a smartphone purchased by a random sample of 36 STAT 3309 students was​ $124. Assume the population standard deviation was​ $8.   Find the​ 90% confidence interval for​ µ. A. ​($122.80, $125.20) B. ​($122.29, $125.71) C. ​($121.81, $126.19) D. ​($116.00, $132.00) 30. The average price of a smartphone purchased by a random sample of 36 STAT 3309 students was​ $124. Assume the population standard deviation was​ $8.   What assumptions need to be made to construct a...
Banking fees have received much attention during the recent economic recession as banks look for ways...
Banking fees have received much attention during the recent economic recession as banks look for ways to recover from the crisis. A sample of 39 customers paid an average fee of ​$12.08 per month on their​ interest-bearing checking accounts. Assume the population standard deviation is ​$1.79 . Complete parts a and b below. a. Construct a 90 ​% confidence interval to estimate the average fee for the population. The 90 ​% confidence interval has a lower limit of ​$nothing and...
A random sample of 44 taxpayers claimed an average of ​$9,700 in medical expenses for the...
A random sample of 44 taxpayers claimed an average of ​$9,700 in medical expenses for the year. Assume the population standard deviation for these deductions was ​$2,379. Construct confidence intervals to estimate the average deduction for the population with the levels of significance shown below. a.5% b.10% c.20% a. The confidence interval with a 5% level of significance has a lower limit of ​$ nothing and an upper limit of ​$ nothing .
Banking fees have received much attention during the recent economic recession as banks look for ways...
Banking fees have received much attention during the recent economic recession as banks look for ways to recover from the crisis. A sample of 34customers paid an average fee of $12.23 per month on their​ interest-bearing checking accounts. Assume the population standard deviation is ​$1.671.67. Complete parts a and b below. a. Construct a9 5​% confidence interval to estimate the average fee for the population.The 95​% confidence interval has a lower limit of$_____and an upper limit of​$____ ​(Round to the...
A cell phone service provider has selected a random sample of 20 of its customers in...
A cell phone service provider has selected a random sample of 20 of its customers in an effort to estimate the mean number of minutes used per day. The results of the sample included a sample mean of 34.5 minutes and a sample standard deviation equal to 11.5 minutes. The population is assumed to be normally distributed. Based on this information, the cell phone service provider wants to construct an interval for the true mean with 99% confidence level. a)...
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...
A random sample of 15 college​ men's basketball games during the last season had an average...
A random sample of 15 college​ men's basketball games during the last season had an average attendance of 5,154 with a sample standard deviation of 1,775. Complete parts a and b below. a. Construct a 99​% confidence interval to estimate the average attendance of a college​ men's basketball game during the last season. The 99​% confidence interval to estimate the average attendance of a college​ men's basketball game during the last season is from a lower limit of to an...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT