/hich sampling distribution should be used and why? OA. Use a normal sampling distribution because the population is normal, and o is known. O B. Use a normal sampling distribution because n> 30. OC. Use a t-sampling distribution because the population is normal, and o is known. O D. Use a normal sampling distribution because the population is normal, and o is unknown. VE. Use a t-sampling distribution because the population is normal, and a is unknown. Use a t-sampling distribution because n<30. tate the appropriate hypotheses to test. YA. Ho pz 25 HiH<25 OC. Ho: u25 Hiu= 25 O B. Họ: us 25 Hi u> 25 O D. Hoi u= 25 /hat is the value of the standardized test statistic?
/hich sampling distribution should be used and why? OA. Use a normal sampling distribution because the population is normal, and o is known. O B. Use a normal sampling distribution because n> 30. OC. Use a t-sampling distribution because the population is normal, and o is known. O D. Use a normal sampling distribution because the population is normal, and o is unknown. VE. Use a t-sampling distribution because the population is normal, and a is unknown. Use a t-sampling distribution because n<30. tate the appropriate hypotheses to test. YA. Ho pz 25 HiH<25 OC. Ho: u25 Hiu= 25 O B. Họ: us 25 Hi u> 25 O D. Hoi u= 25 /hat is the value of the standardized test statistic?
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
Transcribed Image Text:A car company says that the mean gas mileage for its luxury sedan is at least 25 miles per gallon (mpg). You believe the claim is incorrect and find that a random sample of 6 cars has a mean gas mileage of 24 mpg and a standard deviation of 2
mpg. At a = 0.05, test the company's claim. Assume the population is normally distributed.
Click here to view the t-distribution table.
Click here to view page 1 of the normal table.
Click here to view page 2 of the normal table.
Which sampling distribution should be used and why?
A. Use a normal sampling distribution because the population is normal, and o is known.
B. Use a normal sampling distribution because n> 30.
C. Use a t-sampling distribution because the population is normal, and o is known.
D. Use a normal sampling distribution because the population is normal, and o is unknown.
E. Use a t-sampling distribution because the population is normal, and o is unknown.
F.
Use a t-sampling distribution because n<30.
State the appropriate hypotheses to test.
A. Ho μ2 25
Hai µ< 25
B. Ho: μ 25
Hai µ > 25
O C. Ho: µ# 25
Ha: u= 25
D. Ho: µ = 25
H2: µ# 25
What is the value of the standardized test statistic?
The standardized test statistic is
(Round to two decimal places as needed.)
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