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A year ago
A large company is making all of its employees take a stress test. Test scores on this stress test follow a normal distribution with a mean score of 3 and a standard deviation of 0.9 . A random sample of 35 employees is to be taken. What is the probability that the sample mean stress score exceeds 3.5?

Q. 2

The null hypothesis for p = proportion of students who own their own car is H0: p = 0.10 . The significance level is set at  = 0.05. Based on your decision in question 39, what mistake (error) could have been made?

Q. 3

A large company is making all of its employees take a stress test. Test scores on this stress test follow a normal distribution with a mean score of 3 and a standard deviation of 0.9 . A random sample of 35 employees is to be taken. What is the standard deviation of the sampling distribution of the sample mean stress score?

Q. 4

The null hypothesis for p = proportion of students who own their own car is H0: p = 0.10 . The significance level is set at  = 0.05. The results of a study gave a p-value of 0.01 . State your conclusion.

Q. 5

A large company is making all of its employees take a stress test. Test scores on this stress test follow a normal distribution with a mean score of 3 and a standard deviation of 0.9 . A random sample of 35 employees is to be taken. What is the expected value of the sample mean stress score in the sample of 35 employees?

Q. 6

The null hypothesis for p = proportion of students who own their own car is H0: p = 0.10 . The significance level is set at  = 0.05. The results of the study gave a p-value of 0.01 . What is the decision?

Q. 7

Suppose on a highway with a speed limit of 65 mph, the speed of cars are independent and normally distributed with an average speed = 65 mph and standard deviation = 5 mph. What is the probability that the sample mean speed in a random sample of n = 100 cars exceeds 68 mph?

Q. 8

The null hypothesis for p = proportion of students who own their own car is H0: p = 0.10 . The significance level is set at  = 0.05. The value of 10 was obtained ten years ago. The alternative hypothesis will state that the proportion of students who own their own car has increased from the value ten years ago. What is the alternative hypothesis for p?
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wrote...
Posts: 466
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A year ago
Answer to #1

0.0005

Answer to #2

Type 1.

Answer to #3

0.152

Answer to #4

The conclusion is that the proportion of students who own their own car seems to be greater than 10.

Answer to #5

3

Answer to #6

Reject H0.

Answer to #7

9.9101

Answer to #8

Ha: p > 0.10
1
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