tion 13 of 16 > Researchers asked the students in a large first-year college class how many minutes they studied on a typical weeknight. The back-to-back stemplot displays the responses from random samples of 30 women and 30 men from the class, rounded to the nearest 10 minutes. Women Men Which of the following are correct comparisons of the 03333 distributions of study time for men and for women. 96 22222222 888888888875555 56668999 I. Both distributions have similar shapes. II. Both distributions have similar variability. 1 02222222 1 558 4440 00344 III. Both distributions have similar medians. OIonly O I and II only O I, II and III O I and II only Key: 23 - 230 minutes O II only NM3

20 representative students were selected from each of 5 schools intermediate level. The 100 selected students presented themselves to a Math Quiz. A researcher wants to prove that the averages Mathematics performance is not the same in the five schools. I know analyzed the data mediated by ANOVA. Sources / degrees  of freedom / sum of squares / squares media / Fcalculated / pvalue Between groups - 2000 Within groups - 9500 Complete the table to answer: 1) The mean square between groups is: 2) The mean square within groups is: 3). The test calculation is: 4) The value is: 5. Conclusion:

The time to complete the Advanced Placement (AP) Statistics Exam in previous years is normally distributed with an average time of 2.6 hours. Because of school closures due to COVID-19, the College Board offered an at-home test for the 2020 AP Statistics Exam. A teacher feels that students, on average, will have a different completion time for the at-home exam. They take a random sample of 26 students that took the exam and their mean time was 2.73 hours with a standard deviation of 0.25 hours. Test to see if the mean time has significantly changed using a 5% level of significance. Give answers to at least 4 decimal places. What are the correct hypotheses? Ho: Select an answer ✓ H₁: Select an answer ✓ Test Statistic t = ? ✓ Critical-Value t = ± ? ✓ hours Based on the hypotheses, find the following: hours Shade the sampling distribution curve with the correct critical value(s) and shade the critical regions. The arrows can only be dragged to t-scores that are accurate to 1 place after…

Suppose that the duration of a particular type of criminal trial is known to be normally distributed with a mean of 24 days and a standard deviation of 6 days.  80% of all trials of this type are completed within how many days?