We wish to see if, on average, traffic is moving at the posted speed limit of 100 km per hour along a certain stretch of Interstate highway. On each of four randomly selected days, a randomly selected car is timed and the speed of the car is recorded. The observed speeds are 105, 100, 105, and 110 km per hour. Assuming that speeds are Normally distributed with mean μ, we test whether, on average, traffic is moving at 100 miles per hour by testing the hypotheses

H0: μ = 100, Ha: μ ≠ 100. Based on these data (obtain summary statistics and do the test of significance),

Question

We wish to see if, on average, traffic is moving at the posted speed limit of 100 km per hour along a certain stretch of Interstate highway. On each of four randomly selected days, a randomly selected car is timed and the speed of the car is recorded. The observed speeds are 105, 100, 105, and 110 km per hour. Assuming that speeds are Normally distributed with mean μ, we test whether, on average, traffic is moving at 100 miles per hour by testing the hypotheses 
 
 H0: μ = 100, Ha: μ ≠ 100. Based on these data (obtain summary statistics and do the test of significance),

Answer

we would reject H0 at significance level 0.025 but not at 0.01.

Answer

we would reject H0 at significance level 0.01.

Answer

we would reject H0 at significance level 0.05 but not at 0.025.

Answer

we would reject H0 at significance level 0.10 but not at 0.05.

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We wish to see if, on average, traffic is moving at the posted speed limit of 1...

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