In a t-test Luke decided to use a two tailed alpha=0.05. If, the null hypothesis is...
In a t-test Luke decided to use a two tailed alpha=0.05.
If, the null hypothesis is true, what is the probability of making a type I Error?
0.1
0.05
0.95
not enough information
Homework Answers
![\alpha=P[TypeIerror]=P[Reject H_{0}|H_{0}true]](http://img.homeworklib.com/questions/a3008ff0-fd34-11ea-84cb-db254a0afd53.png?x-oss-process=image/resize,w_560)
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In a t-test Luke decided to use a two tailed alpha=0.05.
If, the null hypothesis is...
1. Regarding a two-tailed z-test with an alpha of 0.05, we would need a Zobt with...
1. Regarding a two-tailed z-test with an alpha of 0.05, we would need a Zobt with an absolute value less than 1.96 in order to reject the null hypothesis. True or False? 2. What happens to the probability of committing a Type I error if the level of significance is changed from α = 0.05 to α = 0.01? A. It increases B. It decreases C. It stays the same D. Cannot determine 3. Given a Zobt of -1.99 ,...
In a two tailed (non-directional) t-test, if the null hypothesis is true, what is the t...
In a two tailed (non-directional) t-test, if the null hypothesis is true, what is the t value ? 0? 10? -2? or not equal to 0?
If the p-value for a hypothesis test is 0.07 and the allowed probability of making a...
If the p-value for a hypothesis test is 0.07 and the allowed probability of making a Type I error is 0.05, then the correct decision is to O reject the null hypothesis only if it is a one-tailed test. O not reject the null hypothesis. O reject the null hypothesis. O not reject the null hypothesis only if it a two-tailed test.
If a hypothesis is tested at the a = 0.05 level of significance, what is the...
If a hypothesis is tested at the a = 0.05 level of significance, what is the probability of making a type l error? Choose the correct answer below. A. The probability of making a type I error is 0.05 B. The probability of making a type I error is 0.95 O C. The probability of making a typeI error is 0.5 D. There is insufficient information to determine the probability of a type l error
One tailed t-test O One tailed z-test Question 14 4 pts Which of the following statements...
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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.
11. What is the null hypothesis for a t-test for two independent groups? a. If mul...
11. What is the null hypothesis for a t-test for two independent groups? a. If mul and mu2 are the population means of the two groups, then the null hypothesis is Ho: mul-mu2=0. b. If sl and s2 are the population standard deviations of the two groups, then the null hypothesis is Ho: sl-s2=0. 12. Differentiate between a data set that should be analyzed using a paired t-test from a data set that should be analyzed using a t-test for...
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...
1. What are null hypothesis and alternative hypothesis? 2. Inastatisticaltest,wehavethechoiceofatwo-tailedtest,aleft- tailed test, or a right-tailed test. Which hypothesis is the determining factor fo...
1. What are null hypothesis and alternative hypothesis? 2. Inastatisticaltest,wehavethechoiceofatwo-tailedtest,aleft- tailed test, or a right-tailed test. Which hypothesis is the determining factor for choosing the direction of the test? (In other words, how would you decide it) 3. Forthesamesampledataandnullhypothesis,howdoesthe P-value for a two-tailed test compare to that for a one-tailed test? 4. Using P-value method, how would you reject or fail to reject the null hypothesis? (what is the decision criteria?) How does level of significance matter to the hypothesis...
A null and alternative hypothesis are given. Determine whether the hypothesis test is left-tailed, right-tailed, or...
A null and alternative hypothesis are given. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed. Ho: ơ 8.2 Ha : σ> 8.2 What type of test is being conducted in this problem? OA. ° C. Left-tailed test Two-tailed test B. Right-tailed test
If the p-value for a hypothesis test is 0.07 and the allowed probability of making a Type I error is 0.05, then the correct decision is to O reject the null hypothesis only if it is a one-tailed test. O not reject the null hypothesis. O reject the null hypothesis. O not reject the null hypothesis only if it a two-tailed test.
If a hypothesis is tested at the a = 0.05 level of significance, what is the probability of making a type l error? Choose the correct answer below. A. The probability of making a type I error is 0.05 B. The probability of making a type I error is 0.95 O C. The probability of making a typeI error is 0.5 D. There is insufficient information to determine the probability of a type l error
One tailed t-test O One tailed z-test Question 14 4 pts Which of the following statements most adequately summarizes the conclusion statement resulting from a p-value of 0.03? O We fail to reject the null hypothesis at the alpha level 0.1 We reject the null hypothesis at the alpha level of 0.05 We reject the null hypothesis at the alpha level of 0.01 O We fail to reject the null hypothesis at the alpha level 0.05 Question 15 4 pts
11. What is the null hypothesis for a t-test for two independent groups? a. If mul and mu2 are the population means of the two groups, then the null hypothesis is Ho: mul-mu2=0. b. If sl and s2 are the population standard deviations of the two groups, then the null hypothesis is Ho: sl-s2=0. 12. Differentiate between a data set that should be analyzed using a paired t-test from a data set that should be analyzed using a t-test for...
A null and alternative hypothesis are given. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed. Ho: ơ 8.2 Ha : σ> 8.2 What type of test is being conducted in this problem? OA. ° C. Left-tailed test Two-tailed test B. Right-tailed test
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