QUESTION 5
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The power of the statistical test is zero (0) when the mean is 52, the sample size is 25, and the standard deviation is 2, and the probability of committing Type II error when P
is one (1) (previous
problem).True
False
is one (1) (previous
problem).Homework Answers
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QUESTION 5
The power of the statistical test is zero (0) when the mean is
52,...
QUESTION 4 When the mean is 52, the sample size is 25, and the standard deviation...
QUESTION 4 When the mean is 52, the sample size is 25, and the standard deviation is 2, the probability of committing Type II error when P( 50 < < 54) is one (1). True False
Question 21 (4 points) For a hypothesis test about a population proportion or mean, if the...
Question 21 (4 points) For a hypothesis test about a population proportion or mean, if the level of significance is less than the p- value, the null hypothesis is rejected. (Ch10) True False Question 22 (4 points) Everything else being constant, increasing the sample size decreases the probability of committing a Type II error. (Ch10) True False The power of a statistical test is the probability of not rejecting the null hypothesis when it is true. (Ch10) True False Question...
QUESTION 3 If the alternative hypothesis has a mathematical sign of not equal (≠) and the...
QUESTION 3 If the alternative hypothesis has a mathematical sign of not equal (≠) and the experimental Z value is +3.0 then the p – value is 0.0027. True False QUESTION 4 When the mean is 52, the sample size is 25, and the standard deviation is 2, the probability of committing Type II error when P( 50 < < 54) is one (1). True False
Managers at an automobile manufacturing plant would like to examine the mean completion time for an...
Managers at an automobile manufacturing plant would like to examine the mean completion time for an assembly line operation. The past data indicate that the mean completion time is 44 minutes, but the managers have reason to believe that this value has decreased. The managers plan to perform a statistical test of the claim and choose a random sample of 125 completion times in preparation for this test. Suppose that the population of completion times for the assembly line operation...
"Find the power of the test, when the Null Hypothesis assumes a population mean of Mu...
"Find the power of the test, when the Null Hypothesis assumes a population mean of Mu = 450, with a populaiion standard deviation of 156, the sample size is 5 and the true mean is 638.47 with confidence itnervals of 95%" "Find the power of the test, when the Null Hypothesis assumes a population mean of Mu = 644, with a populaiion standard deviation of 174, the sample size is 3 and the true mean is 744.04 with confidence itnervals...
"Find the power of the test, when the Null Hypothesis assumes a population mean of Mu...
"Find the power of the test, when the Null Hypothesis assumes a population mean of Mu = 450, with a populaiion standard deviation of 156, the sample size is 5 and the true mean is 638.47 with confidence itnervals of 95%" "Find the power of the test, when the Null Hypothesis assumes a population mean of Mu = 644, with a populaiion standard deviation of 174, the sample size is 3 and the true mean is 744.04 with confidence itnervals...
12 0 89 10 11 12 13 14 15 16 QUESTION 2 Increasing the sample size...
12 0 89 10 11 12 13 14 15 16 QUESTION 2 Increasing the sample size a. Increases the power of the statistical test Ob. increases the degrees of freedom OC. changes the critical t value to determine significance O d. all of the above QUESTION 3 It is impossible to find a large effect size if your t-test results are not significant. True False QUESTION 4 P = .032 means there is a 3.2% chance the mean differences are...
One personality test available on the World Wide Web has a subsection designed to assess the...
One personality test available on the World Wide Web has a subsection designed to assess the "honesty" of the test-taker. After taking the test and seeing your score for this subsection, you're interested in the mean score l among the general population on this subsection. The website reports that u is 145, but you believe that u is greater than 145. To do a statistical test, you choose a random sample of 100 people and have them take the personality...
Which of the following statements is FALSE? a.) The power of a hypothesis test is the...
Which of the following statements is FALSE? a.) The power of a hypothesis test is the probability of not making a Type II error. b.) Alpha (α) is equal to the probability of making a Type I error. c.) The probability of rejecting the null hypothesis when the null hypothesis is true is called a Type I Error. d.) A smaller sample size would increase the effectiveness of a hypothesis test.
1. Which of the following will increase the value of the power in a statistical test...
1. Which of the following will increase the value of the power in a statistical test of hypotheses? (a) Increase the Type II error probability. (b) Increase the sample size. (c) Reject the null hypothesis only if the P-value is smaller than the level of significance. (d) All of the above 2. A significance test gives a P-value of 0.023. This means that the result is statistically significant at (a) both the 0.01 and the 0.05 levels. (b) neither the...
Question 21 (4 points) For a hypothesis test about a population proportion or mean, if the level of significance is less than the p- value, the null hypothesis is rejected. (Ch10) True False Question 22 (4 points) Everything else being constant, increasing the sample size decreases the probability of committing a Type II error. (Ch10) True False The power of a statistical test is the probability of not rejecting the null hypothesis when it is true. (Ch10) True False Question...
Managers at an automobile manufacturing plant would like to examine the mean completion time for an assembly line operation. The past data indicate that the mean completion time is 44 minutes, but the managers have reason to believe that this value has decreased. The managers plan to perform a statistical test of the claim and choose a random sample of 125 completion times in preparation for this test. Suppose that the population of completion times for the assembly line operation...
12 0 89 10 11 12 13 14 15 16 QUESTION 2 Increasing the sample size a. Increases the power of the statistical test Ob. increases the degrees of freedom OC. changes the critical t value to determine significance O d. all of the above QUESTION 3 It is impossible to find a large effect size if your t-test results are not significant. True False QUESTION 4 P = .032 means there is a 3.2% chance the mean differences are...
One personality test available on the World Wide Web has a subsection designed to assess the "honesty" of the test-taker. After taking the test and seeing your score for this subsection, you're interested in the mean score l among the general population on this subsection. The website reports that u is 145, but you believe that u is greater than 145. To do a statistical test, you choose a random sample of 100 people and have them take the personality...
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