A psychology professor assigns letter grades on a test according to the following scheme. A: Top 11%11% of scores B: Scores below the top 11%11% and above the bottom 61%61% C: Scores below the top 39%39% and above the bottom 16%16% D: Scores below the top 84%84% and above the bottom 6%6% F: Bottom 6%6% of scores Scores on the test are normally distributed with a mean of 81.881.8 and a standard deviation of 7.87.8. Find the minimum score required for an A grade. Round your answer to the nearest whole number, if necessary.

The following are average points per game for players on the LA Lakers and Miami Heat during the 2019-2020 season: Lakers (20 values): 0, 1.4, 1.5, 2.8, 4.2, 5.1, 5.3, 5.5, 5.7, 6, 6.6, 7.1, 7.5, 8, 8.6, 9.3, 11.9, 12.8, 25.3, 26.1 Heat (21 values): 0.8, 1, 1.4, 2.4, 3, 3, 4.5, 4.6, 5.7, 6.1, 8.2, 8.5, 9.3, 11.3, 11.9, 13.5, 13.5, 15.3, 15.9, 16.2, 19.9 a) Calculate the five-number summary of each. b) Draw boxplots of each. c) Compare the boxplots – how do they differ?

The purpose and intent of the assignment is to help you better understand the sampling distribution of the mean. The class sampling exercise In class we conducted a sampling exercise. The population consisted of 25 elements. The possible values for the elements in the population ranged from 1 to 9 and were distributed as follows:   Value Frequency Proportion Percentage 1               1             0.04             4% 2               2             0.08             8% 3               3             0.12            12% 4               4             0.16            16% 5               5             0.2               20% 6               4             0.16             16% 7               3             0.12             12% 8               2             0.08               8% 9               1             0.04               4%   As in the class exercise, 10 elements are drawn replacing each element before the next is drawn. This was done 1000 times.  The data set is given in a separate…

The national distribution of scores on the Advanced Placement (AP) examination in statistics (out of a possible 5 points) is provided in the following table. Score 1 or 2 3 5 Percentage 40% 25% 23% 12% A simple random sample of 100 high school students who took the AP exam in statistics is taken from the high schools in a certain school district. The observed counts based on this sample of students are provided in the following table. Score 1 or 2 3 4 5 Count 18 19 37 26 The chi-square statistic for these data equals 38.4. What do we know about the P-value for testing if the national model can be used for students in this school district? P-value 0.005 Can't tell

The table below shows the scores of a group of students on a 10-point quiz. Test Score Frequency 3 1 4 1 7 4 8 4 9. 10 2 The mean score on this test is: The median score on this test is: Check Answer

The home run percentage is the number of home runs per 100 times at bat. A random sample of 43 professional baseball players gave the following data for home run percentages.

A psychology professor assigns letter grades on a test according to the following scheme. A: Top 10%10% of scores B: Scores below the top 10%10% and above the bottom 63%63% C: Scores below the top 37%37% and above the bottom 20%20% D: Scores below the top 80%80% and above the bottom 7%7% F: Bottom 7%7% of scores Scores on the test are normally distributed with a mean of 71.571.5 and a standard deviation of 9.59.5. Find the numerical limits for a D grade. Round your answers to the nearest whole number, if necessary.

Forty students took a 50 point computer science test. The scores are shown in the stem and leaf plot: 0l1 7 1|1 1 4 6 210 2 5 8 8 9 312 6 9 414 6 8 510 0 What is the third quartile of the scores? O41 O 44 O 39.5 43.5 O 41.5

Assignment work: The test scrores of a sample of 100 students have a symmetric mounded distribution with a mean score of 570 and SD of 70. Approximately what percent of scores are between : (a) 430 and 710, (b) 360 and 780.

The table below shows the scores of a group of students on a 10-point quiz. Test Score Frequency 3 4 4 2 5 2 6 3 7 1 8 4 9 2 10 1 The mean score on this test is: IncorrectThe median score on this test is: Show your work