Question
Question 1 10 Points In hypothesis testing, the assumption(s) for the Z test for a Mean when the is known a. The sample is a
Question 1
10 Points
In hypothesis testing, the assumption(s) for the Z test for a Mean when the is known
a. The sample is a random sample
b. Either n > or = 25 or the population is normally distributed if n < 25
c. both a) and b)
d. none of the above
Question 2
5 Points
When the value of is increased, the probability of committing a Type I error is
a. Decreased
b. Increased
c. The same
d. None of the above
Question 3
10 Points
The average expenditure per student (based on average daily attendance) for a certain school year was $10,337 with a population standard deviation of $1560. A survey for the next school year of 150 randomly selected students resulted in a sample mean of $10, 798. Find the Z statistics? Should the null hypothesis be rejected at alpha = .05 level of significance?
Question 4
5 Points
The average age of attorneys is greater than 25.6 years
a. Ho: = 25.6 ;HA: not = 25.6
b. Ho: = 25.6 ;HA: > = 25.6
c. Ho: = 25.6 ;HA: < 25.6
d. None of the above
Question 5
10 Points
For the t test , one uses ----------------instead of
a. n
b. s
c.
d. t
Question 6
10 Points
The average expenditure per student (based on average daily attendance) for a certain school year was $10,337 with a population standard deviation of $1560. A survey for the next school year of 150 randomly selected students resulted in a sample mean of $10, 798. Find the 95% confidence level? Should the null hypothesis be rejected?
Question 7
10 Points
List and explain the steps in hypothesis testing
Question 8
5 Points
If you wish to test the claim that the mean of the population is 100, the appropriate null hypothesis is
a.x = 100
b. 100
c. =100
d. 100
Question 9
5 Points
The average age of community college students is 24.6 years. State the null and alternative hypothesis
a. Ho: = 24.6 ;HA: not = 24.6
b. Ho: = 24.6 ;HA: > 24.6
c. Ho: = 24.6 ;HA: < 24.6
d. None of the above
Question 10
5 Points
In hypothesis testing, the p-value is the probability of obtaining a test statistics when
a. The null hypothesis is true
b. The null hypothesis is false
c. Either the alternative hypothesis is true or false
d. None of the above
Question 11
10 Points
The average expenditure per student (based on average daily attendance) for a certain school year was $10,337 with a population standard deviation of $1560. A survey for the next school year of 150 randomly selected students resulted in a sample mean of $10, 798. Find the P-value? Should the null hypothesis be rejected at alpha = .05 level of significance?
Question 12
10 Points
Using the Z table, find the critical value for
a) = .05, two-tailed test
b) = .01, two tailed test
c) = .10, two-tailed test
Question 13
5 Points
The average pulse rate of male marathon runners is less than 70 beats per minute
a. Ho: = 70 ;HA: not = 70
b. Ho: = 70 ;HA: < 70
c. Ho: = 70 ;HA: > = 70
d. None of the above
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