need help with stats/2023, section 7.2 and 7.3, please help with TI-84 commands A car company says that the mean gas mileage for its luxury sedan is at least 22 miles per gallon (mpg). You believe the claim is incorrect and find that a random sample of 5 cars has a mean gas mileage of 21 mpg and a standard deviation of 5mpg. At α=0.10, test the company's claim. Assume the population is normally distributed. Which sampling distribution should be used and why? A. Use a normal sampling distribution because the population is normal, and σ is known. B. Use a normal sampling distribution because the population is normal, and σ is unknown. C. Use a t-sampling distribution because the population is normal, and σ is unknown. D. Use a t-sampling distribution because n<30. E. Use a t-sampling distribution because the population is normal, and σ is known F. Use a normal sampling distribution because n>30. Write out the appropriate hypotheses to test and state the claim: Ho: Ha: What is the value of the standardized test statistic? The standardized test statistic is _______. (round to 2 decimal places as needed.) What is the critical value? The critical value is _ (round to 3 decimal places as needed) What is the outcome and the conclusion of the test? (1) _ (reject or fail to reject) Ho. At the 10% significance level, there is (2) _ (sufficient or insufficient) eveidence to (3)____________ ( reject or support) the car company's claim that the mean gas mileage for the luxury sedan is at least 22 miles per gallon.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Question

I need help with stats/2023, section 7.2 and 7.3, please help with TI-84 commands

A car company says that the mean gas mileage for its luxury sedan is at least

22 miles per gallon (mpg). You believe the claim is incorrect and find that a random sample of 5

cars has a mean gas mileage of 21 mpg and a standard deviation of 5mpg. At α=0.10,

test the company's claim. Assume the population is normally distributed.

Which sampling distribution should be used and why?

A. Use a normal sampling distribution because the population is normal, and σ is known.

B. Use a normal sampling distribution because the population is normal, and

σ is unknown.

C. Use a t-sampling distribution because the population is normal, and σ

is unknown.

D. Use a t-sampling distribution because n<30.

E. Use a t-sampling distribution because the population is normal, and

σ is known

F. Use a normal sampling distribution because

n>30.

Write out the appropriate hypotheses to test and state the claim:

Ho:

Ha:

What is the value of the standardized test statistic?

The standardized test statistic is _______________. (round to 2 decimal places as needed.)

What is the critical value?

The critical value is _______________ (round to 3 decimal places as needed)

What is the outcome and the conclusion of the test?

(1) ___________ (reject or fail to reject) Ho. At the 10% significance level, there is (2) ___________ (sufficient or insufficient) eveidence to (3)__________________ ( reject or support) the car company's claim that the mean gas mileage for the luxury sedan is at least 22 miles per gallon.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Expert Solution