Is the correlation significant at α=0.05? Use the table of critical values for R to decide Sample 27 R=.775
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- if alpha is 1%, find the critical value (z-score)A survey of 90 recently delivered women on the rolls of a county welfare department revealed that 27 had a history of intrapartum or postpartum infection. What is the critical value of z if we need to conclude that the population proportion with a history of intrapartum or postpartum infection is less than 0.25.What is the difference between the critical value of z and the observed value of z?
- find the t value that form the boundaries of the critical region for a two-tailed test with alpha of .05 for n=15In simple linear regression, at what value of the independent variable, X, will the 95% confidence interval for the average value of Y be narrowest? At what value will the 95% prediction interval for the value of Y for a sin gle new observation be narrowest?A snack food manufacturer estimates that the variance of the number of grams of carbohydrates in servings of its tortilla chips is 1.23. A dietician is asked to test this claim and finds that a random sample of 24 servings has a variance of 1.27. At α=0.10, is there enough evidence to reject the manufacturer's claim? Assume the population is normally distributed. (b) Find the critical value(s). I do not know how to calculate the critical value with my calculator. I have a TI83+.
- What is the Zstat and the Critical Value of the above question?Find the t-values that form the boundaries of the critical region for a two-tailed test with alpha of .05 for the n = 15The test statistic of Z equals=−2.06 is obtained when testing the claim that p<0.58 Using a significance level of α=0.01 find the critical value(s).
- If I have a sample of 20 people what is my T-threshold for a two-tail test and an alpha of 0.1 percent?Use the standard error to construct the approximate prediction interval for Y using an alpha of 5%.using the z table (table e), find the critical value (or values) for each. a. alpha=0.10, two tailed test b. alpha=0.01, right tailed test c. aplha=0.005, left tailed test