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Semester GPAs are compared for seven randomly chosen students in each class level at Oxnard University. Does the data prove a significant difference in mean GPAs? GPA1 GPA for Randomly Selected Students in Four Business Majors.
Accounting Finance Human Resources Marketing2.48 3.16 2.93 3.542.19 3.01 2.89 3.712.62 3.07 3.48 2.943.15 2.88 3.33 3.463.56 3.33 3.53 3.502.53 2.87 2.95 3.253.31 2.85 3.58 3.20
Think about a density curve that consists of two line segments. The first goes from the point (0, 1) to the point (0.7, 1). The second goes from (0.7, 1) to (0.9, 2) in the xy-plane. What percent of observations fall below 0.70?
Find the weighted mean if each three-hour course counts for 18%, and each four-hour course counts for 23% of her final semester score.
Construct a 99 percent confidence interval for the mean commission earned by local Tupperware dealers. You may assume the commissions are normally distributed.
Population have at least some college education. choose 10 persons at random. Find the probability that at least 5 do not have any college education.
What is an example of a research problem at your organization that would benefit from the use of either descriptive statistics or probability distribution statistics? Explain.
If an urn is selected at random and a ball is drawn, find the probability it will be red.
A college believes that 28% of applicants to that school have parents who have remarried. How large a sample is needed to estimate the true proportion of students who have parents who have remarried to within 5 percentage points with 95% confidenc..
Tourism is one consideration for CoffeeTime's future. A survey of 1,233 visitors to Mumbai last year revealed that 110 visited a small cafe during their visit. Laura claims that 10% of tourists will include a visit to a cafe.
A business man arrives on a randomly selected day in December. What is the probability that the temperature will be above?
Suppose that you are conducting a survey of customer satisfaction regarding their cellular phone. If you called 11 households at random, what is the probability that every household has a cellular telephone?
Find the probability that a standard normal random variable will assume a value between: Find a z such that 70% of the area is above that value.
In a class, the grade of a student on an exam is an RV with expectation 60 and variance 16. If the class average is between 55 and 65, with a probability greater than or equal to 0.9, determine the number of students that have taken the exam.
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