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 Speed: 73 68 67 74 74 70 68 73 65 69 67 63 66 64 67 65 70 64 63 61 62 63 63 66 64 62 65 62 70 62 66 64 67 61 69 66 61 70 65 61

a. The speed limit on this portion of Interstate 95 is 65 mph. Specify the competing hypotheses in order to determine if the average speed is greater than the speed limit.

  • H0: μ = 65; HA: μ ≠ 65

  • H0: μ ≥ 65; HA: μ < 65

  • H0: μ ≤ 65; HA: μ > 65

b-1. Calculate the value of the test statistic. (Round your answer to 3 decimal places.)

b-2. Find the p-value.

  • 0.05  p-value < 0.10
  • 0.01  p-value < 0.020
  • p-value  0.10
  • p-value < 0.01

  • 0.020 p-value < 0.05

c. At α = 0.01, are the officer’s concerns warranted?

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
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...
Kuya heard that oldest children tend to be more miserable about life than their youngest siblings...
Kuya heard that oldest children tend to be more miserable about life than their youngest siblings (not taking into consideration the number of siblings in between). Kuya gathered data from 33 families and measured their scores on a misery scale. The lower the score, the more miserable the person tends to be. MISERY SCALE SCORES Oldest Youngest 62 62 80 67 70 62 56 66 86 71 79 63 68 64 67 64 62 73 74 71 68 70 69...
A randomly selected sample of college basketball players has the following heights in inches. 65, 62,...
A randomly selected sample of college basketball players has the following heights in inches. 65, 62, 64, 61, 68, 61, 63, 70, 66, 71, 65, 62, 61, 66, 69, 71, 69, 67, 65, 65, 65, 71, 67, 63, 71, 67, 68, 63, 66, 70, 69, 64 Compute a 99% confidence interval for the population mean height of college basketball players based on this sample and fill in the blanks appropriately. < μ < (Keep 3 decimal places)
A randomly selected sample of college basketball players has the following heights in inches. 65, 63,...
A randomly selected sample of college basketball players has the following heights in inches. 65, 63, 67, 67, 67, 70, 63, 65, 62, 66, 70, 62, 68, 67, 69, 67, 61, 68, 67, 67, 64, 69, 67, 62, 63, 65, 63, 65, 71, 62, 64, 61 Compute a 95% confidence interval for the population mean height of college basketball players based on this sample and fill in the blanks appropriately. ___ < μ < ___ (Keep 3 decimal places)
Refer to the accompanying data set and construct a 95​% confidence interval estimate of the mean...
Refer to the accompanying data set and construct a 95​% confidence interval estimate of the mean pulse rate of adult​ females; then do the same for adult males. Compare the results. Males    Females 81           82 72           94 52           57 59           66 51           54 62           80 52           77 74           85 51           89 62           57 73           35 61           64 62           87 80           74 80           79 63           62 63           67 97           76 43           60 85           65 72           86 66           85 73           69 72          ...
A randomly selected sample of college basketball players has the following heights in inches. 63, 62,...
A randomly selected sample of college basketball players has the following heights in inches. 63, 62, 71, 63, 63, 63, 69, 61, 68, 64, 62, 62, 65, 69, 69, 71, 66, 62, 63, 64, 66, 61, 63, 67, 65, 64, 63, 61, 68, 68, 67, 62 Compute a 95% confidence interval for the population mean height of college basketball players based on this sample and fill in the blanks appropriately. ______< μ <_____ (Keep 3 decimal places)
We found that the sample mean and sample standard deviation for this sample data are 65.16...
We found that the sample mean and sample standard deviation for this sample data are 65.16 inches and 2.54 inches, respectively. Do you find sufficient evidence in the sample data to support the claim that the mean height of female engineering students at UH is greater than 65 inches at α = 0.05? Answer this question using both fixed-? approach and P-value approach. (Hint: for P-value approach, you need to find P-value range using the t-table as demonstrated in the...
data on the heights of 37 randomly selected female engineering students at UH: 62 64 61...
data on the heights of 37 randomly selected female engineering students at UH: 62 64 61 67 65 68 61 65 60 65 64 63 59 68 64 66 68 69 65 67 62 66 68 67 66 65 69 65 69 65 67 67 65 63 64 67 65 We found that the sample mean and sample standard deviation for this sample data are 65.16 inches and 2.54 inches, respectively. Do you find sufficient evidence in the sample data...
Use ? to approximate σ. Use a 5% level of significance. Data: 69 62 75 66...
Use ? to approximate σ. Use a 5% level of significance. Data: 69 62 75 66 68 57 61 84 61 77 62 71 68 69 79 76 87 78 73 89 81 73 64 65 73 69 57 79 78 80 79 81 73 74 84 83 82 85 86 77 72 79 59 64 65 82 64 70 83 89 69 73 84 76 79 81 80 74 77 66 68 77 79 78 77
Using the data below, compute the following predicted values. 70 62.5 69 64.6 64 69.1 71...
Using the data below, compute the following predicted values. 70 62.5 69 64.6 64 69.1 71 73.9 68 67.1 66 64.4 74 71.1 73 71.0 62 67.4 69 69.3 67 64.9 68 68.1 72 66.5 66 67.5 72 66.5 68 70.3 71 67.5 67 68.5 71 71.9 75 67.8 64 58.6 65 64.7 67 65.3 72 61.0 72 65.4 72 67.4 67 60.9 71 63.1 66 60.0 75 71.1 69 62.2 70 67.2 69 63.4 62 68.4 66 62.2 76...