2. The following are the scores of two groups of students who took the make-up test in Statistics Group B 75 Group A 62 58 72 65 35 43 53 72 66 Find the following measurement for each group and answer the preceding questions. a. mean b. standard deviation c. standard error of mean d. coefficient of variation e. Answer the following į. Which group performed better in the test? ii. Which group shows more variability in scores? iii. Which group has a more uniform set of scores?

The following refer to the following data set: 51.5 78.1 78.1 78.1 38.1 69.9 44.1 58 40.2 56.2 What is the arithmetic mean of this data set? mean = What is the median of this data set? median = = What is the mode of this data set? mode =

The governor of a state wanted to assess the public education system of the state. She instructed a group of researchers to create a test to assess the knowledge of every high school senior in the state. The researchers administered the tests and found that the average score was 74 points out of 100, with a standard deviation of 20 points. Complete parts (a) through (c) below. a. Identify the population and variable. Choose the correct population below. A. The population is the group of all high school seniors in the state. O B. The population is the group of every state's governor. O C. The population is the group of all high school teachers in the state. O D. The population is the group of all high school students in the state. Choose the correct variable below. O A. The variable is the number of high school seniors. O B. The variable is the test length. YC. The variable is the test score. O D. The variable is the number of high school students. b. For samples of size 225, find the…

Find the missing weight in the following data set: Person 1 2 3 4 weight 139 150 181 X Deviation from the Mean -21.5 -10.5 20.5 11.5

Use the properties of the mean and median to determine which are the correct mean and median for the following histogram.   Relative Frequency   0.05 0.10 0.15 0.20 0.25 0.30   1 2 3 4 5 6 7 8 9 0           Choose the correct answer.   Mean is  4.2  and median is  4.5 .     Mean is  5.1  and median is  2.1 .     Mean is  2.4  and median is  2.6 .     Mean is  4.1  and median is  4.6 .

The following set of data is from a sample of n=7.   5    3    8    4    9    3    10        a. Compute the​ mean, median, and mode. b. Compute the​ range, variance, standard​ deviation, and coefficient of variation. c. Compute the Z scores. Are there any​ outliers? d. Describe the shape of the data set.

3. Calculate the mean, median, mode, variance, and standard deviation for each of the following two groups of scores, which represent student performance on a health science test, with the highest possible score being 50. Group A 35 49 33 44 45 21 28 411 Group B 20 25 50 44 16 29 37 21 40 39 23 26 a. Which group has the greatest variability in scores? b. Which group has the highest mean score? c. How would you describe each group when comparing it to the other?

5. Use the following values to answer the items below:                        4, 4, 4, 5, 5, 6, 6, 6, 6, 7, 8, 8, 9, 9, 10, 11       a. Create a simple frequency distribution table. Include columns for frequency, proportion, cumulative frequency, and cumulative percent.       b. What is the N?       c. What is the mean?       d. What is the mode?       e. What is the percentile rank of X = 6.5?       f. What is the P75 ?

The following refer to the following data set: 43 49 26 76 96 66 35 49 81 73 What is the mean (¯xx¯) of this data set?mean =  (Please show your answer to one decimal place.)What is the median of this data set?median = What is the mode of this data set?mode =

Consider the following data set. Round your answers to the nearest hundredth as needed. 38 42 37 28 56 48 47 68 68 68 Mean = ___Median = ___Mode = ___Range = ___