Question
A police officer is concerned about speeds on a certain section of Interstate 95. The data...
A police officer is concerned about speeds on a certain section
of Interstate 95. The data accompanying this exercise show the
speeds of 40 cars on a Saturday afternoon.
Highway speeds
| 65 |
| 60 |
| 63 |
| 68 |
| 66 |
| 70 |
| 70 |
| 68 |
| 69 |
| 65 |
| 61 |
| 68 |
| 61 |
| 67 |
| 65 |
| 61 |
| 69 |
| 70 |
| 67 |
| 65 |
| 60 |
| 69 |
| 70 |
| 68 |
| 61 |
| 60 |
| 66 |
| 64 |
| 65 |
| 68 |
| 61 |
| 62 |
| 62 |
| 60 |
| 69 |
| 62 |
| 62 |
| 62 |
| 69 |
| 62 |
a. The speed limit on this portion of Interstate 95 is 66 mph. Specify the competing hypotheses in order to determine if the average speed is greater than the speed limit.
1)H0: μ = 66; HA: μ ≠ 66
2)H0: μ ≥ 66; HA: μ < 66
3)H0: μ ≤ 66; HA: μ > 66
b-1. Calculate the value of the test statistic. (Round your answer to 3 decimal places.)
b-2. Find the p-value. Pick correct answer
1)0.05 p-value < 0.10
2)p-value 0.10
3)p-value < 0.01
4)0.01 p-value < 0.020
5)0.020 p-value < 0.05
Homework Answers
Answer #1
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