Homework Answers
From the given information above,
The two sided alternative hypothesis must be used when to calculate power of the statistical test.
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Question 7 1 pts To calculate the power of a statistical test, which of the following...
D Question 7 1 pts To calculate the power of a statistical test, which of the...
D Question 7 1 pts To calculate the power of a statistical test, which of the following conditions MUST be met? O The standard deviation of the population data must be the same as the standard error of the sample data O None are correct O A two-sided alternative hypothesis must be used O Both the population data and the sample data must be normally distributed
For a sample of 200 entrepreneurs, a statistical test of their mean age has produced the...
For a sample of 200 entrepreneurs, a statistical test of their mean age has produced the following results: z=31-30/sqrt(25/200)=2.8284, P=0.002339 The sample mean of age is 31 years, its standard deviation is 5. What is the null hypothesis in this test and can this hypothesis be rejected? Why? How can you tell from these results whether a one-sided test been used or a two-sided test? What is the alternative hypothesis in this 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 22 3 pts Suppose you are interested in testing a null hypothesis and the p-value...
Question 22 3 pts Suppose you are interested in testing a null hypothesis and the p-value associated with the test statistic is 0.004. As a result, you should o reject the null hypothesis at the 5-percent level of significance, but not at the 1- percent level of significance. do not reject the null hypothesis at the 5-percent level of significance, but do reject the null at the 1-percent level of significance. o do not reject the null hypothesis at the...
nutra/courses/_498545804_1/ct/outline 1) - Unit 114 Hypothesis Test for Mean Population Standard Deviation Unknown Critical Value Approach...
nutra/courses/_498545804_1/ct/outline 1) - Unit 114 Hypothesis Test for Mean Population Standard Deviation Unknown Critical Value Approach Understand the assumptions and conditions for using the best for hypothesis testing and compute the value of the test statistic Question If a hypothesis test were to be performed, in which of the following contexts would a t-test be appropriate? Select the correct answer below. A sample mean of 30 pounds and a standard deviation of pounds are obtained using a simple random sample...
For which of the following is a t-test appropriate for performing a hypothesis test? Select the...
For which of the following is a t-test appropriate for performing a hypothesis test? Select the correct answer below: O A sample mean of 33 pounds and a standard deviation of 3 pounds are obtained using a simple random sample of 18 mountain bikes from the most popular bicycles offered by major retailers having approximately normally distributed weights. The population standard deviation is 2.4 pounds. O A simple random sample of 12 two-inch candles is taken from the candles offered...
Question 8 1 pts Which of the following is a reason to perform a statistical test?...
Question 8 1 pts Which of the following is a reason to perform a statistical test? O We suspect that an increase in one quantity is associated with a proportional increase or decrease in another quantity We suspect that the mean of two populations is the same All are correct We suspect that the mean of a population is positive
please give correct and answer all question.. this is revision question... 14. Which of the following...
please give correct and answer all question.. this is revision
question...
14. Which of the following statistical tests is BEST TO normally distributed data? in statistical tests is BEST to use for comparing two samples A. Independent sample t-test B.Mann-Whitney test C. Regression analysis D. Logistic regression analysis 15. Which of the following is NOT related to central limit theoret? sample size is large. bution of sample mean, x is approximately normal regardless of Xin the population 9. The mean...
Question 10 O pts BONUS QUESTION WORTH 10 points! TWO TAIL TEST: Suppose that a random...
Question 10 O pts BONUS QUESTION WORTH 10 points! TWO TAIL TEST: Suppose that a random sampleof 16 measures from a normally distributed population gives a sample mean of x 13.5 and a sample standard deviation of s-6. The Null Hypothesis is equal to 15 and the Alternate Hypothesis is not equal to 15. Using hypothesis testing for T values, do you reject the null hypothesis at alpha - 10 level of signingance? yes no maybe 23 not sure
QUESTION 5 The power of the statistical test is zero (0) when the mean is 52,...
QUESTION 5
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
5 5
D Question 7 1 pts To calculate the power of a statistical test, which of the following conditions MUST be met? O The standard deviation of the population data must be the same as the standard error of the sample data O None are correct O A two-sided alternative hypothesis must be used O Both the population data and the sample data must be normally distributed
Question 22 3 pts Suppose you are interested in testing a null hypothesis and the p-value associated with the test statistic is 0.004. As a result, you should o reject the null hypothesis at the 5-percent level of significance, but not at the 1- percent level of significance. do not reject the null hypothesis at the 5-percent level of significance, but do reject the null at the 1-percent level of significance. o do not reject the null hypothesis at the...
nutra/courses/_498545804_1/ct/outline 1) - Unit 114 Hypothesis Test for Mean Population Standard Deviation Unknown Critical Value Approach Understand the assumptions and conditions for using the best for hypothesis testing and compute the value of the test statistic Question If a hypothesis test were to be performed, in which of the following contexts would a t-test be appropriate? Select the correct answer below. A sample mean of 30 pounds and a standard deviation of pounds are obtained using a simple random sample...
For which of the following is a t-test appropriate for performing a hypothesis test? Select the correct answer below: O A sample mean of 33 pounds and a standard deviation of 3 pounds are obtained using a simple random sample of 18 mountain bikes from the most popular bicycles offered by major retailers having approximately normally distributed weights. The population standard deviation is 2.4 pounds. O A simple random sample of 12 two-inch candles is taken from the candles offered...
Question 8 1 pts Which of the following is a reason to perform a statistical test? O We suspect that an increase in one quantity is associated with a proportional increase or decrease in another quantity We suspect that the mean of two populations is the same All are correct We suspect that the mean of a population is positive
please give correct and answer all question.. this is revision
question...
14. Which of the following statistical tests is BEST TO normally distributed data? in statistical tests is BEST to use for comparing two samples A. Independent sample t-test B.Mann-Whitney test C. Regression analysis D. Logistic regression analysis 15. Which of the following is NOT related to central limit theoret? sample size is large. bution of sample mean, x is approximately normal regardless of Xin the population 9. The mean...
Question 10 O pts BONUS QUESTION WORTH 10 points! TWO TAIL TEST: Suppose that a random sampleof 16 measures from a normally distributed population gives a sample mean of x 13.5 and a sample standard deviation of s-6. The Null Hypothesis is equal to 15 and the Alternate Hypothesis is not equal to 15. Using hypothesis testing for T values, do you reject the null hypothesis at alpha - 10 level of signingance? yes no maybe 23 not sure
QUESTION 5
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
5 5
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