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A university in your region estimates that verbal GRE scores of students who apply for admission to graduate school can be described by a Normal model with a mean of 550 and a standard deviation of 80. The staff in admissions open the application envelopes at random looking for 10 applicants with GRE scores over 600. How many envelopes do you think the staff will need to open?
If they enroll this many pupils, how much would they need to charge per pupils in order to realize their profit goal of $5,000.
A random sample of 8 petrol stations in each of three European countries A, B and C was taken. The price per litre at each station was recorded in Euros. The prices are given below.
Find the expected value if the cost of entering this sweepstakes is the cost of a postage stamp. Is it worth entering the contest?
When bucketing data for a histogram what is the standard way of dealing with data entries that are on the boundary of two buckets?
A roulette wheel has 38 slots, numbered 0, 00, and 1 to 36. The slots 0 and 00 are colored green, 18 of the others are red, and 18 are black.
A 1990 census report revealed that the mean distance that U. S. citizens live from their birthplace is 50 miles and that the standard deviation is 15 miles. A random sample of 49 residents of your city yielded a mean distance of 56 miles.
The length of pregnancies are normally distributed with a mean of 268 days and standard deviation of 15 days. How many days do 80 percent of women last until in their birthing process?
Tthe hypothesis test used (normal curve, single sample t-test, dependent samples t-test, independent samples t-test, ANOVA). For situations 1, 3, 4, and 5, also state whether the test is unilateral or bilateral.
The ANOVA table is given below,as well as a table of means and standard deviations for the three groups. Evaluate the t statistic for testing contrast
What are the inequalites that define the region in the first quadrant. How about 2nd, 3rd and 4th quadrants?
At the .01 significance level, is there a difference in the mean number of times men and Women order take-out dinners in a month? What is the p -value?
A study was conducted to determine if there was a relationship between the prices a non-member of a club paid for various publications and the prices that a member paid for the same publications. The data gathered is shown below.
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