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Question 7 Independent random samples of vehicles traveling past a given point on an interstate highway...

Question 7

Independent random samples of vehicles traveling past a given point on an interstate highway have been observed on Monday versus Wednesday. For 16 cars observed on Monday, the average speed was 59.4 mph, with a standard deviation of 3.7 mph. For 20 cars observed on Wednesday, the average speed was 56.3 mph, with a standard deviation of 4.4 mph. At the 0.05 level, and assuming normal populations, what is the calculated value of test statistic, t? (Specify your answer to the 3rd decimal.)

7.b

. Independent random samples of vehicles traveling past a given point on an interstate highway have been observed on Monday versus Wednesday. For 16 cars observed on Monday, the average speed was 59.4 mph, with a standard deviation of 3.7 mph. For 20 cars observed on Wednesday, the average speed was 56.3 mph, with a standard deviation of 4.4 mph. At the 0.05 level, and assuming normal populations, what is the calculated value of degree of freedom? (Specify your answer to the 2nd decimal.)

7.c

. Independent random samples of vehicles traveling past a given point on an interstate highway have been observed on Monday versus Wednesday. For 16 cars observed on Monday, the average speed was 59.4 mph, with a standard deviation of 3.7 mph. For 20 cars observed on Wednesday, the average speed was 56.3 mph, with a standard deviation of 4.4 mph. At the 0.05 level, and assuming normal populations, what is your conclusion based on calculated value of test statistic and critical value?

Reject H0 and conclude that speeds are faster on Monday than on Wednesday

Do not reject H0 and conclude that speeds are not faster on Monday than on Wednesday

math   Statistics-And-Probability   
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