What is the approximate value of the standard deviation

Reference no: EM131008541

Suppose that the distribution of scores on an exam is closely described by a normal curve with mean 100. The 16th percentile of this distribution is 80.

a. What is the 84th percentile?

b. What is the approximate value of the standard deviation of exam scores?

c. What z score is associated with an exam score of 90?

d. What percentile corresponds to an exam score of 140?

e. Do you think there were many scores below 40? Explain.

18 18 25 19 23	20	69	18 21 18 20 18
18 20 18 19 28	17	18	18

Reference no: EM131008541

Questions Cloud

Prepare any journal entry necessary as a direct result : Prepare any journal entry necessary as a direct result of the change as well as any adjusting entry for 2011 related to the situation described.

Inventory management in manufacturing organizations : The inventory management has lots of challenges and it requires proper planning and execution of adopted processes and technologies to manage it in an efficient way - Inventory management in manufacturing organizations.

Facts in aristotle''s framework : [Categories by Aristotle] Here are some facts: Bruce is a buffalo, Bruce is brown, Bruce is sunbathing. Analyze these facts using the framework Aristotle develops in the Categories. Explain the differences in status between these facts in Aristotle's..

What was his total cost : A chandelier was marked up 150% from an original cost of $96. Last Friday, Tamir bought the chandelier and paid an additional 5% in sales tax. What was his total cost

What is the approximate value of the standard deviation : Suppose that the distribution of scores on an exam is closely described by a normal curve with mean 100. The 16th percentile of this distribution is 80. What is the 84th percentile?

Determine the multiple regression equation : Determine the multiple regression equation and interpret the partial regression coefficients. Dave has a 3.6 grade point average and 3 university activities listed on his résumé. What would be his estimated starting salary

Wagner changed from fifo to average cost : Due to an unexpected relocation, Wagner determined that its office building, previously depreciated using a 45-year life, should be depreciated using an 18-year life.

Calculate the values of sample mean and standard deviation : The accompanying data on milk volume (in grams per day) were taken from the paper "Smoking During Pregnancy and Lactation and Its Effects on Breast Milk Volume" (American Journal of Clinical Nutrition [1991]: 1011-1016): Calculate the values of th..

Explain the impact of culture on business practices : Explain the impact of culture on business practices in an international organization and evaluate the challenges of doing business in another culture.

User Account

All Pages