ch n Question 20 For the following z-test statistic, compute the p-value assumin
ID: 3221945 • Letter: C
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ch n
Question 20
For the following z-test statistic, compute the p-value assuming that the hypothesis test is a one-tailed test: z = 1.34.
0.0124
0.0815
0.0606
0.0901
Question 21
The makers of Mini-Oats Cereal have an automated packaging machine that can be set at any targeted fill level between 12 and 32 ounces. Every box of cereal is not expected to contain exactly the targeted weight, but the average of all boxes filled should. At the end of every shift (eight hours), 16 boxes are selected at random and the mean and standard deviation of the sample are computed. Based on these sample results, the production control manager determines whether the filling machine needs to be readjusted or whether it remains all right to operate. Use = 0.05. Establish the appropriate null and alternative hypotheses to be tested for boxes that are supposed to have an average of 24 ounces.
H0 : = 22 ounces Ha : 22 ounces
H0 : = 16 ounces Ha : 16 ounces
H0 : = 32 ounces Ha : 32 ounces
H0 : = 24 ounces Ha : 24 ounces
Question 22
For the following z-test statistic, compute the p-value assuming that the hypothesis test is a one-tailed test: z = 2.09.
0.0172
0.0183
0.0611
0.0415
Question 23
According to CNN business partner Careerbuilder.com, the average starting salary for accounting graduates in 2008 was at least $47,413. Suppose that the American Society for Certified Public Accountants planned to test this claim by randomly sampling 200 accountants who graduated in 2008.
Compute the power of the hypothesis test to reject the null hypothesis if the true average starting salary is only $47,000. Assume that the population standard deviation is known to be $4,600 and the test is to be conducted using an alpha level equal to 0.01.
0.8554
0.0872
0.9812
0.1446
Question 24
The following is an appropriate statement of the null and alternate hypotheses for a test of a population mean:
H0: < 50
HA : > 50
True
False
Question 25
For the following hypothesis test:
With n = 80, = 9, and = 47.1, state the calculated value of the test statistic z.
3.151
-3.121
-2.141
2.087
Question 26
Which of the following statements is true?
Alpha and beta are directly related such that when one is increased the other will increase also.
The alternative hypothesis should contain the equality.
The decision maker controls the probability of making a Type I statistical error.
Alpha represents the probability of making a Type II error.
Question 27
For the following z-test statistic, compute the p-value assuming that the hypothesis test is a one-tailed test: z = -1.55.
0.0172
0.0901
0.1512
0.0606
Question 28
According to CNN business partner Careerbuilder.com, the average starting salary for accounting graduates in 2008 was at least $47,413. Suppose that the American Society for Certified Public Accountants planned to test this claim by randomly sampling 200 accountants who graduated in 2008. State the appropriate null and alternative hypotheses.
H0 : $47,413 HA : > $47,413
H0 : < $47,413 HA : $47,413
H0 : > $47,413 HA : $47,413
H0 : $47,413 HA : < $47,413
Question 29
The null and alternate hypotheses must be opposites of each other.
True
False
Explanation / Answer
For the z-test statistic,
the p-value (assuming that the hypothesis test is a one-tailed test) for
z = 1.34
is
1-z(1.34)
=1-0.909877
=0.0901
answer is 0.0901
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