statistics
posted by john .
In this unit we have worked with scores and their locations within a distribution. This discussion is designed to get you to think a little more about distributions of scores. Shown below are two samples of scores. Input these scores into SPSS and use plots and data descriptions to see if you can guess which sample of scores is a random sample of scores from a population that has a normal distribution with a mean of 80 and a standard deviation of 20. Leave a discussion message that describes your methods and whether you think sample A or sample B is most likely to have come from the population I just described. Explain your reasons. Check back to see if your classmates arrived at the same conclusion. After reading several other posts describe why you would stick with your original answer or change it now that you’ve read answers from other people.
Sample A
94
97
79
81
73
109
73
90
70
74
Sample B
65
95
63
87
79
85
68
103
96
67
87
87
69
80
112
98
73
87
84
117
Respond to this Question
Similar Questions

statistics
The distribution of scores on the SAT is approx. normal with mu= 500 and std dev=100. a)what proportion of the population have SAT scores above 650? 
Statistics
For a normal distribution with a mean of m = 80 and a standard deviation of s = 20, find the proportion of the population corresponding to each of the following scores. a. Scores greater than 85 b. Scores less than 100 c. Scores between … 
statistics
Sat scores l around the nation tend to have a mean score around 500, a standard deviation of about 100 points and are approximately normal distributions. a person who scores 600 on the sat 1 has approximately what percentile rank within … 
statistics
5. The table below shows Psychology exam scores, Statistics Exam scores, and IQ scores for a random sample of students. What can you observe in the relationship between IQ and psychology, psychology and statistics, and IQ and statistics? 
statistics
5. The table below shows Psychology exam scores, Statistics Exam scores, and IQ scores for a random sample of students. What can you observe in the relationship between IQ and psychology, psychology and statistics, and IQ and statistics? 
statistics
The box plot below summarize the distributions of SAT verbal and math scores among students at an upstate New York high school. 300 400 500 600 700 800 data Whic of the following statements is false? 
Math
105 91 82 59 97 72 72 88 81 What is the mode of these scores? 
statistics
The grades on the final examination given in a large organic chemistry class are normally distributed with a mean of 72 and a standard deviation of 8. The instructor of this class wants to assign an “A” grade to the top 10% of … 
statistics
Nine students took the SAT. Their scores are listed below. Later on, they read a book on test preparation and retook the SAT. Their new scores are listed below. Construct a 95% confidence interval for µ d (the true mean difference … 
Basic Statistics
The math grades on the final exam varied greatly. Using the scores below, how many scores were within one standard deviation of the mean?