Find the critical value(s) and rejection region(s) for the indicated t-test, level of significance α, and sample size n. Left-tailed test, α=0.01, n=13
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- Find the critical value(s) and rejection region(s) for the indicated t-test, level of significance α,and sample size n. Right-tailed test, α=0.01, n=25 Critical value? Determine the rejection regions?A study is designed to determine the effect of an office-training course on typing productivity. Fifteen typists who have not taken the course are randomly selected. The investigator assigns 20 pages of equally difficult text to be typed by each typist both before and after completing the training course. The investigator wants to find out whether the training course has reduced the number of errors by more than 10. Define d = Before − After. Significance level What conclusion should we reach if the p-value is 0.113?Meth Barie's ice cream shop wants to decide whether to introduce a new ice cream flavor. They randomly selected 15 customers at their downtown Denton location to rate this new flavor. The rating is on a scale of 1 to 5, with 1 being 'not interested' and 5 being 'strongly interested'. Meth Barie's will approve the new flavor if the true mean rating is over 4.0. What is the rejection region for testing at the 0.1 level of significance?
- (The output processed data is in the picture below) A company has four branch offices. At each branch office, the research was carried out using a random sample, then the data was processed using ANOVA with the following results: Based on the results of data processing, answer the following questions: a. What is the number of samples (N) used in the study?b. State the value for F-countc. Using the significance level or the Alpha (α) value 4%, test the hypotheses in the study and provide the conclusion.d. How do you think the conclusions of the research are?Find the critical value(s) and rejection region(s) for the indicated t-test, level of significance α, and sample size n. Two-tailed test, α = 0.10, n=13 The critical value(s) is/are?You are conducting a study to see if the accuracy rate for fingerprint identification is significantly less than 0.13. You use a significance level of α=0.05α=0.05. H0:p=0.13H0:p=0.13 H1:p<0.13H1:p<0.13You obtain a sample of size n=632 in which there are 76 successes.What is the test statistic for this sample? (Report answer accurate to three decimal places.)test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.)p-value =
- Test the research hypothesis that there is a difference in weights between the two groups at the 0.05 significance level? Assume the equality of variance, adequate sample size, and normal distribution for both the groups to test the hypothesis. X1 = 200 X2 = 198 n1 = 17 n2 = 17 s1 = 2.45 s2 = 2.35 Please show all the necessary steps of hypothesis testing to answer this question.III) Find the critical value and rejection region for the type of chi-square test with sample size n and level of significance a. Two -tailed test, n = 25, a = 0.10You are conducting a study to see if the accuracy rate for fingerprint identification is significantly more than 0.24. You use a significance level of α=0.001α=0.001. H0:p=0.24H0:p=0.24 H1:p>0.24H1:p>0.24You obtain a sample of size n=383n=383 in which there are 100 successes.What is the test statistic for this sample? (Report answer accurate to three decimal places.)test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.)p-value =
- Find the critical value(s) and rejection region(s) for the indicated t-test, level of significance a, and sample size n. Right-tailed test, a=0.10, n=19.Drug Trial ProblemClinical trials for a drug was conducted using a treatment group and a placebo group. The results are shown in the table below. Treatment Placebo μ μ₁ μ₂ n 33 38 x̄ 2.31 2.87 s 0.85 0.71 Use a 0.05 significance level to test the claim that the two samples are from populations with different means. State the final conclusion regarding the claim (using p-value). ______________ the HO since the p-value is __________ the significance level α.Find the critical value(s) and rejection region(s) for the indicated t-test, level of significance α, and sample size n. Right-tailed test, α=0.01, n=16