While the following simple random samples of Statistics test scores both come from populations that are normally distributed, we do not know the standard deviation of the populations. The first simple random sample is drawn from the scores on Exam 1 for an on-line Statistics class and the second simple random sample is drawn from the scores on the exact same Exam 1 for an on-land (traditional) Statistics class. Using the null hypothesis that there is no difference in the performance of the two groups test the claim that the on-line class actually performs better on the average on Exam 1 than the on-land (traditional) class does.
On-line Statistics Class Scores on the Objective Portion of the Exam 1 Chapters 1 - 3
93 85 78 62 88 73 70 87 58 91 70 74 78
97 72 90 61 93 89 91 93 82 85 90 92 56
On-land (Traditional) Statistics Class Scores on the Objective Portion of Exam 1 Chapters 1 – 3
73 64 62 58 85 77 59 67 95 71 97 80 72
86 76 73 81 72 89 94 72
Test the hypothesis indicated above at the α = 0.05 level of significance by doing the following the 8 steps described in the Handout Steps in Hypothesis Testing.
While the following simple random samples of Statistics test scores both come from populations that are...
Use the Grouped Distribution method for the following exercise (see Self-Test 2-4 for detailed instructions), rounding each answer to the nearest whole number. Using the frequency distribution below (scores on a statistics exam taken by 80 students), determine:ion 1 of the preliminary test (scores on a statistics exam taken by 80 students), determine: 68 84 75 82 68 90 62 88 76 93 73 79 88 73 60 93 71 59 85 75 61 65 75 87 74 62 95...
Use the Grouped Distribution method for the following exercise (see Self-Test 2-4 for detailed instructions), rounding each answer to the nearest whole number. Using the frequency distribution below (scores on a statistics exam taken by 80 students), determine:ion 1 of the preliminary test (scores on a statistics exam taken by 80 students), determine: 68 84 75 82 68 90 62 88 76 93 73 79 88 73 60 93 71 59 85 75 61 65 75 87 74 62 95...
Question 1 15 pts Test scores for a class of 40 students are listed below: 25 35 43 44 47 48 54 55 56 57 59 62 63 65 66 68 69 69 71 72 72 73 74 76 77 77 78 79 80 81 81 82 83 85 89 92 93 94 97 98 a) The mean of the sample data is b) The median of the sample data is c) The standard deviation of the sample data is...
The following data are scores on a standardized statistics examination for independent random samples of students from two small liberal arts colleges. College A 78, 84, 81, 78, 76, 83, 79, 75, 85, 81 College B: 89, 78,83, 85, 87,78, 85,94, 88, 87 Use these data for question on this task. Consider the test of hypothesis Ha: Populations have the same location parameter H.: Populations have different location parameters 3. Use information in Questions 1 and 2 to make a...
Question 6 recent statistics exam yielded the following 25 scores. Construct a grouped frequency distribution with the class limits shown below 70 82 72 56 62 57 88 70 68 94 90 89 45 77 89 80 87 78 97 58 76 76 44 86 93 Class Limits Tally Frequency 41-50 51-60 61-70 71-80 81-90 91-100 Class Limits Frequency 41-50 51-60 61-70 71-80 81-90 91-100 Class Limats Freqaency 41-50 51-60 61-70 71-80 81-90 1.100 Class Limits Frequency 41-50 51-60 61-70...
#1. Identify what type of sampling method is used (random, systematic, convenience, stratified, cluster). (a) To judge the appeal of a proposed television sitcom, a random sample of 10 people from each of three different age categories was selected and those chosen were asked to rate a pilot show. (b) To maintain quality control in a brewery, every 1000th bottle of beer coming off the production line is opened and tested. #2. The scores of 40 students on a statistic...
Question 9-15 are based on the random sample below which is obtained to test the following hypothesis about the population mean. Test the hypothesis that the mean is less than 80. 80 100 81 93 80 57 98 90 71 56 58 78 59 55 55 77 72 78 56 94 98 59 93 86 89 62 60 66 59 71 96 97 94 69 64 77 87 77 64 90 90 95 98 99 56 69 72 81 95...
Find the indicated measure. The test scores of 40 students are listed below. Find P85. 30 35 43 44 47 48 54 55 56 57 59 62 63 65 66 68 69 69 71 72 72 73 74 76 77 77 78 79 80 81 81 82 83 85 89 92 93 94 97 98 1) 85 2) 87 3) 89 4) 34
Find the indicated measure. The test scores of 40 students are listed below. Find P85. 30 35 43 44 47 48 54 55 56 57 59 62 63 65 66 68 69 69 71 72 72 73 74 76 77 77 78 79 80 81 81 82 83 85 89 92 93 94 97 98 1) 85 2) 87 3) 89 4) 34
8. The following data are scores from a Physics final administered to 34 students. 81 76 93 99 47 67 69 72 83 88 56 62 91 94 98 63 77 84 98 75 79 67 73 65 89 86 91 85 97 73 56 92 88 83 Use the Chart below to construct a Frequency Distribution with 5 classes (15 pts) Class Tally (This column is optional.) Frequency