The probability of observing a value for a test statistic under the null hypothesis which is as extreme as, or more extreme than, the observed value of the test statistic in a given sample is called: The critical probability O a (alpha) The p-value O B ( beta ) Question 40 (1 point) Consider the data below. What is the value of X ? Group 1 Group 2 Group 3 10 20 15 Sample Standard Deviation 8 7 3 Sample mean 13 10 8 31 O 10 44 45 Prisco. Home 5 9 E R T Y U D F G H K C V B N MQuesLIUII 3/ (1 JUBIL A student was working on a regression problem. The student did not have the time to finish the problem but left the following calculations behind. (You may safely assume that the calculations are correct.) What is the coefficient of determination for this data? 34 16 2.1719 24 04 0.96 5.76 0.1 05719 0 1791 0.0302 0.16 0.16 a.fe 10.3043 0.0706 0.793- 0.36 0.4545 0.7084 34 16 1.2174 25 0.36 0 3876 0.1464 8.2174 00471 12 0.526 0.6719 O.5260 O.6620 O.6739 O.4383 Question 38 (1 point) For a lower-tailed test with a 95% confidence level and 50 degrees of freedom, the value of f is: -2.009 +1.96 O-1.676 O+1.676 Prisch Home 9% A 3 5 7 E R T Y U D F G H K C V B N MWhen a sum of squares is divided by its associated degrees of freedom, you get: The error (or residual) sum of squares A mean square A x statistic An Fstatistic Question 36 (1 point) An insurance company selected samples of clients under 18 years of age and over 18 and recorded the number in the sample that had one or more accidents in the previous year. The results are shown below. Under Age of 18 Over Age of 18 Number having one or more accidents in the previous year 11 9 Sample size 50 30 We are interested in testing the hypothesis that the accident proportions differ between the two age groups against the null hypothesis that they do not differ. The pooled estimator of p is: O.22 O.26 O.30 O.25 dx Prisco Home S A & 5 6 7 E R T Y U D F G H C V B N MQuestion 33 (1 point) Assuming that the population standard deviation is 60, how large a sample would be needed to provide a 95% confidence interval with a margin of error of 5? 390 24 959 554 Question 34 (1 point) What is the estimate of the standard error for the proportion? ( np(1-p) O p(1-P) n O p(1-p) Question 35 (1 point) Home 9 E R T Y U D F G H K C V B N MQuestion 29 (1 point) What is 100(1-)% known as? The level of statistical significance The probability of making a Type I error The confidence level The p-value Question 30 (1 point) You want to test the hypothesis that H. : /4 - 24 50. What kind of hypothesis would this be? An upper-tail hypothesis A non-directional hypothesis A lower-tail hypothesis A two-tailed hypothesis Question 31 (1 point) The level of significance of a statistical test is the Home S 3 4 5 7 E R T Y U D F G H C V B N MQuestion 31 (1 point) The level of significance of a statistical test is the Same as the confidence coefficient The minimum allowable probability of making a Type | error The maximum allowable probability of making a Type | error Same as the p-value Question 32 (1 point) An investigator has just completed a study using students as subjects. The data were analyzed using ANOVA. The critical value of F was given by Fos, 5, 14. How many students were involved in the study? O 19 20 Os 14 Question 33 (1 point) Assuming that the population standard deviation is 60, how large a sample would be needed to provide a Home 5 8 E R T Y U D F G H K X C V B N M