T/F please give brief explanations
Homework Answers
(c) TRUE. The Wald test is equivalent to rejecting the null if θ0 is not in the 1 − α confidence interval.
(b) False. The p-value is the probability of obtaining results as extreme as the observed results of a statistical hypothesis test, assuming that the null hypothesis is correct. For example if we are using Z-test and the value of the test statistic be "g", then the probability of getting atleast the value g in the direction of alternate hypothesis assuming our null hypothesis to be true is the p-value.
(c) True. If the underlying population is not normal then t-test cannot be used.
(d) True.
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T/F please give brief explanations
b) The p-value of a test is the probability of type...
α is the probability of a Type I error, which occurs when we accept the alternative...
α is the probability of a Type I error, which occurs when we accept the alternative H1 when the null hypothesis Ho is true. True False A Type II error occurs when when a false null hypothesis is rejected. True False If a null hypothesis is rejected at the 5% significance level but not at the 1% significance level, then the p-value of the test is less than 1%. True False The power of a test is the probability of...
For each problem, select the correct response. (a) What is the P-value of a test of...
For each problem, select the correct response. (a) What is the P-value of a test of the null hypothesis? A. The probability the null hypothesis is false B. The probability, assuming the null hypothesis is false, that the test statistic will take a value at least as extreme as that actually observed C. The probability the null hypothesis is true D. The probability, assuming the null hypothesis is true, that the test statistic will take a value at least as...
1. A hypothesis test is an example of: a.Descriptive statistics b.Inferential statistics c.A measurement of spread...
1. A hypothesis test is an example of: a.Descriptive statistics b.Inferential statistics c.A measurement of spread d.Data mining 2. If an analyst collects data to determine if the mortality rate at her facility is different from the state average ps, what are the appropriate null and alternative hypotheses? a. HO:p=ps vs HA: pps b. HO:pps vs HA: p=ps c. HO:p=ps vs HA: p>ps d. HO:p≥ps vs HA: p<ps 3. In hypothesis testing, a type I error is: a. The probability...
Select the correct definition of the p-value of a test from the answer choices below: The...
Select the correct definition of the p-value of a test from the answer choices below: The probability that the null hypothesis is true The probability that, assuming the null hypothesis is true, we obtained a test statistic as or more extreme than what we calculated The probability that, assuming the alternative hypothesis is true, we obtained a test statistic as or more extreme than what we calculated The probability that the alternative hypothesis is false, given that the null hypothesis...
Need help figuring out how the P value was obtained, can I please get a breakdown...
Need help figuring out how the P value was obtained, can I
please get a breakdown of the process?
Population1 Population 2 Assume that both populations are normally distributed (a) Test whether ?1 12 at the ?:0.05 level of significance for the given sample data. (b) Construct a 95% confidence interval about 1- 16 5.6 (a) Test whether ?| 2 at the ? 0.05 level of significance for the given sample data. Determine the null and alternative hypothesis for this...
Find the critical value and rejection region for the type of t-test with level of significance...
Find the critical value and rejection region for the type of t-test with level of significance a and sample size n. Left-tailed test, a=0.1, n = 34 O A. to = -1.308; T< -1.308 O B. to = 1.308; i>1.308 OC. to = -2.445;t< -2.445 OD. to = -1.307;t< - 1.307 State whether the standardized test statistic t indicates that you should reject the null hypothesis. Explain. (a)t = 2.106 (b) t = 0 (c) t= -2.049 (d) t =...
A. B. 2. The test statistic,is ______ (Round to two decimal places as needed.) 3. The P-value is ______ (Round t...
A.
B.
2. The test statistic,is ______
(Round to two decimal places as needed.)
3. The P-value is ______
(Round to three decimal places as needed.)
4. State the conclusion for the test.
________________ the null hypothesis. There ______ sufficient
evidence to support the claim that those treated with magnets have
a greater mean reduction in pain than those given a sham
treatment.
5. Is it valid to argue that magnets might appear to be
effective if the sample sizes...
Decide (with short explanations) whether the following statements are true or false. ) Them ae t pdicen st ame t eulbeant Than global F-test is highly significant. For this reason, it is better not t...
Decide (with short explanations) whether the following
statements are true or false.
) Them ae t pdicen st ame t eulbeant Than global F-test is highly significant. For this reason, it is better not to remove both predictors simultaneously depend variable, or both, does not change the regression R2 the same or fall must fail to reject it at a significance level of a-0.10. o) The process of multiplying the dependent variable by a constant, adding a constant to the...
please show your work...................... 14. a. Probability of making a Type I error b. Probability of...
please show your work......................
14. a. Probability of making a Type I error b. Probability of making a Type Il error c. Probability of rejecting Ho when you are supposed to d. Probability of not rejecting Ho when you shouldn't. Which of the following probabilities is equal to the significance level a? 15. If we reject the null hypothesis when it is false, then we have committed a. a Type ll error b. a Type l error both a Type...
Question 1 to 11, True or False? Applied business statistics 1) The width of the confidence...
Question 1 to 11, True or False? Applied business statistics
1) The width of the confidence interval depends only on the desired level of confidence 2) When population standard deviation is unknown, sample standaird deviation is used and the interval estimation is based on values from the t- rather than the z-distribution n 3) The z value for a 98% confidence interval around the point estimate is 2.33 4) In order to construct a 90% confidence interval for the population...
Select the correct definition of the p-value of a test from the answer choices below: The probability that the null hypothesis is true The probability that, assuming the null hypothesis is true, we obtained a test statistic as or more extreme than what we calculated The probability that, assuming the alternative hypothesis is true, we obtained a test statistic as or more extreme than what we calculated The probability that the alternative hypothesis is false, given that the null hypothesis...
Need help figuring out how the P value was obtained, can I
please get a breakdown of the process?
Population1 Population 2 Assume that both populations are normally distributed (a) Test whether ?1 12 at the ?:0.05 level of significance for the given sample data. (b) Construct a 95% confidence interval about 1- 16 5.6 (a) Test whether ?| 2 at the ? 0.05 level of significance for the given sample data. Determine the null and alternative hypothesis for this...
Find the critical value and rejection region for the type of t-test with level of significance a and sample size n. Left-tailed test, a=0.1, n = 34 O A. to = -1.308; T< -1.308 O B. to = 1.308; i>1.308 OC. to = -2.445;t< -2.445 OD. to = -1.307;t< - 1.307 State whether the standardized test statistic t indicates that you should reject the null hypothesis. Explain. (a)t = 2.106 (b) t = 0 (c) t= -2.049 (d) t =...
A.
B.
2. The test statistic,is ______
(Round to two decimal places as needed.)
3. The P-value is ______
(Round to three decimal places as needed.)
4. State the conclusion for the test.
________________ the null hypothesis. There ______ sufficient
evidence to support the claim that those treated with magnets have
a greater mean reduction in pain than those given a sham
treatment.
5. Is it valid to argue that magnets might appear to be
effective if the sample sizes...
Decide (with short explanations) whether the following
statements are true or false.
) Them ae t pdicen st ame t eulbeant Than global F-test is highly significant. For this reason, it is better not to remove both predictors simultaneously depend variable, or both, does not change the regression R2 the same or fall must fail to reject it at a significance level of a-0.10. o) The process of multiplying the dependent variable by a constant, adding a constant to the...
please show your work......................
14. a. Probability of making a Type I error b. Probability of making a Type Il error c. Probability of rejecting Ho when you are supposed to d. Probability of not rejecting Ho when you shouldn't. Which of the following probabilities is equal to the significance level a? 15. If we reject the null hypothesis when it is false, then we have committed a. a Type ll error b. a Type l error both a Type...
Question 1 to 11, True or False? Applied business statistics
1) The width of the confidence interval depends only on the desired level of confidence 2) When population standard deviation is unknown, sample standaird deviation is used and the interval estimation is based on values from the t- rather than the z-distribution n 3) The z value for a 98% confidence interval around the point estimate is 2.33 4) In order to construct a 90% confidence interval for the population...
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