Question

rer daims that their jeep has a 28.8 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this jeep. After testing 26 jeeps they found a mean MPG of 29.0 with a varlance of 2 that level the jeeps outperform the manufacturer's MPG rating? Assume the po Step 1 of 5: State the null and alternative hypotheses Ha: Prev o 2018

Answer 1

The statistical software output for this problem is:

One sample T summary hypothesis test:
μ : Mean of population
H₀ : μ = 28.8
H_A : μ > 28.8

Hypothesis test results:

Mean	Sample Mean	Std. Err.	DF	T-Stat	P-value
μ	29	0.2941742	25	0.67986927	0.2514

Hence,

Step - 1: Hypotheses:

Ho: μ < 28.8

Ha: μ > 28.8

Step - 2: Test statistic = 0.680

Step - 3: One-tailed test

Step - 4: Reject Ho if t > 2.485

Step - 5: Fail to reject the null hypothesis