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Question: The scores on an exam are normally distributed with µ = 30 and s = 7. (Show your working.)
a) What percent of the population have scores above 40?
b) What percent have scores between 30 and 40?
c) What score will place a student in the top 5% (to 1 decimal place)?
In order to estimate the average time spent on the computer terminals per student at a local university, data were collected for a sample of 81 business students over a one week period.
Identify the sampling distribution to be used: the standard normal distribution or the Student's t distribution. Find the critical value(s).
What is the probability that a randomly selected mango weighs less than 14 ounces?
Computer science instructor, 3 statistics instructors, and 4 science instructors. If an instructor is selected, find the probability of getting a science instructor or math instructor.
Here is a two-way table showing enrollment data for full-time undergraduate students in U.S. colleges and universities. The entries are thousands of students:
Suppose the regression equation that has been used to estimate the value of existing homes is as follows; Interpret the meaning of the slopes of this equation.
A management trainee is selected at random. What is the probability that the person selected is a female who did not attend college?
Discuss the purpose of transforming raw scores into standard scores. Describe what "normal distribution" means. Describe measures of variability and explain how they can help therapist understand assessment data.
The business estimates the true population standard devuation is around $2,400.If yhe confidence level is 90%, find the required sample size in order to meet the desired accuracy.
State the null hypothesis and the alternate hypothesis. State the decision rule. Compute the value of the test statistic. What is your decision regarding the null hypothesis?
Calculate the MEAN and STANDARD DEVIATION for the distribution below:
Evette has 41 1/2ft. of string. She wants to cut it into pieces 3 3/4ft. long. How many pieces of string will she have? how much string remains, if any?
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