+1-415-670-9189
info@expertsmind.com
What proportion of students should score above 120
Course:- Basic Statistics
Reference No.:- EM13240583




Assignment Help
Expertsmind Rated 4.9 / 5 based on 47215 reviews.
Review Site
Assignment Help >> Basic Statistics

A psychologist has developed a test to measure self-control. The test is normed so that it has a mean of 100 and a standard deviation of 15... The scores are normally distributed in the population of college students used to develop the test.

a. What is the percentile rank of a score of 80? 

b. What percentage of scores falls between 80 and 120? 

c. What is the standard score for a test score of 90? 

d. What proportion of students should score above 120? 

e. What is the cutoff point below which 87% of all scores fall?




Put your comment
 
Minimize


Ask Question & Get Answers from Experts
Browse some more (Basic Statistics) Materials
Standard deviation of 0.02 ounce. You can permit cup to overfill 4% of the time. What amount must you set as mean amount of coffee to be dispensed?
Reconsider Prob. 20.7-12. The economy is beginning to boom so the management of Transcontinental Airlines is predicting that the number of people flying will steadily increa
The McNemar test is a test on a 2x2 classification table when you want to test the difference between paired proportions. Chi-square test for 2X2 tables compares the tallies
Explain how the Central Limit Theorem can help you convince your boss that while you can't get rid of sampling error the results from your statistical work (that is based on
A personnel manager has a computer-generated list of all employees that indicates that 70 percent are full-time employees, 20 percent are part-time employees, and 10 percent
A study of 200 advertising firms revealed their income after taxes: What is the probability an advertising firm selected at random has under $1 million in income after taxes?
Of the polynomial models discussed in this section, which one would tend to be most applicable for such data? What would be the signs of the partial regression coefficient(s
Use SPSS and generate all necessary summary statistics and figures (e.g. boxplots, histograms and/or scatter plots) to describe the relationship between the workers' mental