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Use normal approximation to estimate the probability of passing a true/false test of 60 questions if the minimum passing grade is 80% and all responses are random guesses.
Find the probability that student is happy with the choice of major, a psychology major and a communications major given that the student is happy with the choice of major.
Determine the expected frequencies for each of the cells in the following contingency tables. For each problem, state how many of the expected values actually had to be computed and how many could be found by subtraction.
A car rental company has determined that the probability a car will need service work in any given month is 0.2. The company has 900 cars.
Describe the assumptions of normality and homogeneity of variance. When these assumptions are violated, what are your options?
Do a two-sample test for equality of means assuming equal variances. Calculate the p-value. Comparison of GPA for randomly chosen college juniors and seniors: ¯ x1 = 3.05, s1 = .20, n1 = 15, ¯ x2 = 3.25, s2 = .30, n2 = 15, α = .025, left-tailed t..
A large population of overdue bills has balances that follow a normal curve. When we take a sample of 100 of these the average is $500 and the SD is $100.
How much better are the workers at one plant compared to another? How much "better" is line 1 of variety A compared to line 2 of variety C?
Any state auto insurance company took a random sample of 370 insurance claims paid out during a 1-year period. the average claim was $750 with a standard deviation of $150. find .99 confidence interval for the mean claim payment.
When the data have the properties of ordinal data and the interval between observations is expressed in terms of a fixed unit of measure, the variable has which scale of measurement
Generate a training sample of size 100 for each class, as well as a test sample of 5,000 per class. (Best to generate the centroids matrices per class once and store them).
Assume the probability that a person has the desease is 0.09 for all people, independently of each other, and compute the expected number of tests necessary for the entire group of 154 people.
What is the probability that a visually impaired student gets less than 6.9 hours of sleep?
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