Hypothesis testing and confidence interval Intro to stats for business practice
ID: 3325095 • Letter: H
Question
Hypothesis testing and confidence interval Intro to stats for business practice questions. Please indicate the answer for each multiple choice question and why.
(1 points) when does 1ypo l error accur? (1 points) When does lypo II error occur? Name: The null is rejected while it is in fact true B The null is not rejected while it is in fact true & The null is not rejected while it is in fact falae D. The null is rejected while it is in fact false 2.) (2 points) A pharmaceutical company has developed a naw medicine for high blood pressure. Before puting it on the market they scheduled a cinical trial. Which ane af the following statement can be stated as the null? ) A. The average decrase ofblo ressure of all atles in tho cliical tialafter taking the medicine is higher than 0 r taking tire average decrease of blcod pressure of all patients in the clinical trial after taking the medicine is 0 The average decrease of blood preasure of all patients with high blood pressure after taking the medicine is 0 D. The average decrease of blood presaure of all patients with high blood pressure after taking the medicine is higher than 0 3. (2 points) For the same data set and same hypotheais, which of the following slatements may NOT be tue?( A. You reject it at a-001 and reject it at a=0.05 B. You fail to reject it at a=0.01 and reject it at a=0.05 C. You reject it at -001 and fail to reject it at a=0.05 D. You fail toreject it at =0.01 and fail to reject it at a-0.05 E. All above four cases could happen. 4. (2 points) There are two hypothesis testing. first one H0: =0 vs. Ha: >0, second one H0: -0 vs. Ha: #0 For the same data set and sama significance level, which of the following statements m NOT be true? significance level, which of the following statements may A. You fail to reject the first one and reject the second one B. You fail to reject the first ane and fail to reject the seoond one C. You reject the first one and reject the second one D. You reject the first one and fail to reject the sacond one E. All above four cases could happan 5. (2 points) If the 95% Cl of mu is (-15, 1.2), at alpha-o05, what is your oonclusion for hypothesis H0: mu=0 vs. Ha: mu>0? ( A. You reject the null B. You fail to reject the null C. There is not enough information to concludeExplanation / Answer
1. Type I error is associated with the probability of rejecting the null hypothesis when it is True. Option A is correct.
Type II error is associated with the probability of not rejecting the null hypothesis when it is False. Option C is correct.
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