In the hypothesis testing procedure, a is O the critical value. O the level of significance. O 1-level of significance. O the confidence level.
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A: The given values are: x¯=33,s=10,n=24,H0:μ=26,Ha:μ>26.
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A: Solution: From the given information, p-hat=0.56 and n=600.
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A: Given : Response frequency A 12 B 15 C 16 D 18 E 19 sum = 80
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A: Claim : whether a subject lies is independent of the polygraph test indication.
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A: It is given that we reject the null hypothesis at 5% significance level.
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A: 38,28,31,33,32,42,26,22,29,26,32,33,30,29,27,27,29,24sample size(n)=18=0.10
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A: df=(row-1)(column -1)
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Q: what sample size should be used?
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A: Estimation always done by confidence interval Testing is always done hypothesis testing
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- A survey was conducted to determine whether hours of sleep per night are independent of age. A sample of individuals was asked to indicate the number of hours of sleep per night with categorical options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more. Later in the survey, the individuals were asked to indicate their age with categorical options: age 39 or younger and age 40 or older. Sample data follow. Age Group Hours of Sleep 39 or younger 40 or older Fewer than 6 38 36 6 to 6.9 60 57 7 to 7.9 76 74 8 or more 66 93 (a) Conduct a test of independence to determine whether hours of sleep are independent of age. (b) What is your estimate of the percentages of individuals who sleep fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more per night?Test the claim that the proportion of men who own cats is smaller than the proportion of women who own cats at the .025 significance level. The null and alternative hypothesis would be: Ho MMF Ho: PM = PF H₁: MMF O H₁: PM > PF O The test is: two-tailed right-tailed O The test statistic is: Based on a sample of 60 men, 25% owned cats Based on a sample of 40 women, 40% owned cats The p-value is: Ho: M = μF H₁: UMThe P-value for a hypothesis test is shown. Use the P-value to decide whether to reject Ho when the level of significance is (a) a = 0.01, (b) a= 0.05, and (c) a=0.10. P = 0.0762 (a) Do you reject or fail to reject Ho at the 0.01 level of significance? O A. Reject H, because the P-value, 0.0762, is less than a=0.01. O B. Reject Ho because the P-value, 0.0762, is greater than a = 0.01. OC. Fail to reject H, because the P-value, 0.0762, is greater than a = 0.01. O D. Fail to reject H, because the P-value, 0.0762, is less than a = 0.01. (b) Do you reject or fail to reject Ho at the 0.05 level of significance? O A. Fail to reject Ho because the P-value, 0.0762, is less than a = 0.05. O B. Reject H, because the P-value, 0.0762, is less than a = 0.05. O C. Reject H, because the P-value, 0.0762, is greater than a = 0.05. O D. Fail to reject Ho because the P-value, 0.0762, is greater than a = 0.05.What is the power of a test? Select all that apply. a.The probability that a significance test will pick up on the fact that the true value is different from the null. b.The probability of incorrectly rejecting the null when it's true. c.The probability of incorrectly failing to reject the null when it's false. d.The probability of correctly rejecting the null when the null is false. e.The probability of avoiding a type 2 error37. Suppose you repeated your hypothesis test over and over again with many different data sets. Which of the following statements is true? Group of answer choices The significance levels would change but the p-values would stay the same. The significance level would stay the same and so would the p-values. The significance level would stay the same but the p-values would change. The significance levels would change and so would the p-values. (THANK U)The table below includes results from polygraph (lie detector) experiments conducted by researchers. In each case, it was known if the subjected lied or did not lie, so the table indicates when the polygraph test was correct. Use a 0.05 significance level to test the claim that whether a subject lies is independent of the polygraph test indication. Do the results suggest that polygraphs are effective in distinguishing between truth and lies? E Click the icon to view the table. Determine the null and alternative hypotheses. O A. Ho: Whether a subject lies is independent of the polygraph test indication. H1: Whether a subject lies is not independent of the polygraph test indication. O B. Ho: Polygraph testing is not accurate. H1: Polygraph testing is accurate. O C. Ho: Polygraph testing is accurate. H1: Polygraph testing is not accurate. O D. Ho: Whether a subject lies is not independent of the polygraph test indication. H1: Whether a subject lies is independent of the polygraph test…The table to the right contains observed values and expected values in parentheses for two categorical variables, X and Y, where variable X has three categories and variable Y has two categories. Use the table to complete parts (a) and (b) below. EQuestion Help X, X2 32 44 51 (35.39)(44.42)(47.19 19 20 17 (15.61)(19.58)(20.81) O B. H,: The Y category and X category have equal proportions. H,: The proportions are not equal. OC. Hn: The Y category andX category are dependent. H,: The Y category and X category are independent. OD. Ho: H -E, and Hy =E, H: H #E, or H, 7E, What is the P-value? P-value = (Round to three decimal places as needed.) Enter your answer in the answer box and then click Check Answer. portMaps YouTube PeopleForms Contr... → Morning Song by S... e Morning Song The... How smallpox deva... G Atzec cared about s... Test the claim that the mean GPA of night students is larger than 2.7 at the 0.005 significance level. The null and alternative hypothesis would be: Ho:p> 2.7 Ho: p=0.675 Ho: p 0.675 Ho: 0.675 H₁: p2.7 H₁: 2.7 O of O O O The test is: two-tailed left-tailed right-tailed O Based on a sample of 55 people, the sample mean GPA was 2.73 with a standard deviation of 0.02 The p-value is: Based on this we: O Reject the null hypothesis Fail to reject the null hypothesis Question Help: Video Post to forum Submit Question (to 2 decimals)Hypothesis Test: Perform the specified hypothesis test. Be sure to include your statistical andin-context conclusion statements. In 1994, 52% of parents with children in high school felt it was a serious problem that high schoolstudents were not being taught enough math and science. A recent survey found that 512 of 1000 parentswith children in high school felt it was a serious problem that high school students were not being taughtenough math and science. Do parents feel different today than they did in 1994? Use the α = 0.005significance level.Q13. The null Hypothesis is rejected, if the P-value is larger than significance level.a. Trueb. FalseA man was buying shoes wheb a salesperson commebted on hiw small his feet were. After telling her she had a lousy sales technique, he decided to inveatigate if he really does have feet that are smaller than the typical american man. If he is in the 20th percentile for shoe size among american men, is the saleswoman right or wrong?Describe type I and type Il errors for a hypothesis test of the indicated claim. A furniture store claims that no more than 60% of its new customers will return to buy their next piece of furniture. Describe the type error. Choose the correct answer below. A. A type error will occur when the actual proportion of new customers who return to buy their next piece of furniture is no more than 0 60 but you reject Ho p≤0.60. B Atype error will occur when the actual proportion of new customers who return to buy their next piece of furniture is at least 0 60, but you reject H, p=0.60 C. A type l error will occur when the actual proportion of new customers who return to buy their next piece of furniture is at least 0.60, but you fail to reject H, p=0.60 D Atype 1 error will occur when the actual pro ortion of new customers who return to buy their next piece of furniture is Clear all Check answer
