In a random sample of four mobile devices, the mean repair cost was $70.00 and the standard deviation was $13.50. Assume the population is normallydistributed and use a t-distribution to find the margin of error and construct a 95% confidence interval for the population mean. Interpret the results.The 95% confidence interval for the population mean μ is(Round to two decimal places as needed.)...

sample size(n)=4Mean()=70.00standard deviation(s)=13.50confidence level=95%

Answered: In a random sample of four mobile…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

Tina catches a 14-pound bass. She does not know the population mean or standard deviation. So she takes a sample of five friends and they say the last bass they caught was 9, 12, 13, 10, and 10 pounds. Find the t and calculate a 95% (α = .05) confidence interval.
In a random sample of 60 refrigerators, the mean repair cost was $111.00 and the population standard deviation is $16.40. Construct a 95% confidence interval for the population mean repair cost. Interpret the results. Construct a 95% confidence interval for the population mean repair cost. The 95% confidence interval is ( D. (Round to two decimal places as needed.)
You want to buy a washing machine, and a salesperson tells you that the mean repair costs for Model A and Model B are equal. You research the repair costs. The mean repair cost of 29 Model A washing machines is $211. Assume the population standard deviation is $15. The mean repair cost of 26 Model B washing machines is $216. Assume the population standard deviation is $25. At a = 0.01, can you reject the salesperson's claim? Assume the samples are random and independent, and the populations are normally distributed. Complete parts (a) through (e). O A The mean repair cost for Model A is greater than Model B B. The mean repair costs for Model A and Model B are equal. O C. The mean repair cost for Model A is less than Model B O D. The mean repair costs for Model A and Model B are different. Let u, be the mean repair cost for Model A and let u, be the mean repair cost for Model B. What are Ho and H,? O B. Ho: H1 =H2 Hai H1 # H2 O E. Ho: H1 # H2 OC. Ho: H1 SH2 Hai H1>H2 OF. Ho: H1ZH2 Ha:…
The distribution of study times for first-year students follow a Normal distribution with a standard deviation σ = 48 minutes. Suppose a sample of 344 students found that the mean study time for these students was x¯= 170 minutes per week. Use this to find a 94.38% confidence interval to estimate the mean study time for all students. We are 94.38% confident that the mean study time for first-year students is between the following ( answer) minutes and ( answer) minutes. The answer needs to be the mean study time for first-year students is between what amount of minutes and the following minutes.
Suppose the prices for the iphone 12 are normally distributed with an unknown population mean and a population standard deviation of 75$. A random sample of 50 stores is taken and gives a sample mean price of $850. What are the lower and upper bounds for a 83% confidence interval of the population mean price?
Data set is on picture #2
A successful basketball player has a height of 6 feet 11 inches, or 211 cm. Based on statistics from a data set, his height converts to the z score of 5.17. How many standard deviations is his height above the mean?
An economist found that a random sample of 45 high school teachers had an average annual salary of $58,230. A previous study showed that the population standard deviation is $4450. Calculate the margin of error, E, for a 90% confidence interval for µ, the average annual salary of all high school teachers. A. $1488.6 B. $1300.2 C. $1652.1 D.$1091.2
In a random sample of six mobile devices, the mean repair cost was $80.00 and the standard deviation was $13.00. Assume the population is normally distributed and use a t-distribution to find the margin of error and construct a 99% confidence interval for the population mean. Interpret the results. C The 99% confidence interval for the population mean u is (Round to two decimal places as needed.) The margin of error is $ (Round to two decimal places as needed.) Interpret the results. Choose the correct answer below. O A. If a large sample of mobile devices are taken approximately 99% of them will have repair costs between the bounds of the confidence interval. OB. With 99% confidence, it can be said that the population mean repair cost is between the bounds of the confidence interval. O C. It can be said that 99% of mobile devices have a repair cost between the bounds of the confidence interval. O D. With 99% confidence, it can be said that the repair cost is between the bounds of the…
In a random sample of ten people, the mean driving distance to work was 25.5 miles and the standard deviation was 7.3 miles. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 90% confidence interval for the population mean μ. Interpret the results. Identify the margin of error. (Round to one decimal place as needed.) Construct a 90% confidence interval for the population mean. (...) (Round to one decimal place as needed.) Interpret the results. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) OA. % of all random samples of ten people from the population will have a mean driving distance to work (in miles) that is between the interval's endpoints. OB. It can be said that % of the population has a driving distance to work (in miles) that is between the interval's endpoints. OC. With % confidence, it can be said that most driving distances to…
A carton contains 20 bulbs of which 3 are defective.A women has agreed to buy the carton of bulbs .If she select 3 bulbs at random one after the other without replacement and it contains at most 1 defective bulbs.Find the probability that she does not buy the carton of bulbs.

Recommended textbooks for you

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

SEE MORE TEXTBOOKS