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A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean of 175 and a standard deviation of 15. If an applicant is randomly selected, find the probability of a rating that is between 150 and 200.
There are 6 children in a family. The number of children defines a population. The number of simple random samples of size 2 that are possible equals:
Determine following probabilities where Z follows standard Normal distribution?
Is there a difference in the mean allowances nationally and the mean allowances in northwestern Ohio for nine-year-olds?
In past, mean processing time was 45 days. At 0.05 level of significance, is there evidence that mean processing time has changed from 45 days?
Analyze the data using linear contrasts to make the following comparisons:
Find out 90% confidence interval for mean grade of all the students in the class.
In general, determine the standard score a measure of?
In a nationwide study directed by UMUC Teaching Hospital, 780 persons with stable heart disease were treated. Half of the subjects were treated with drugs and half underwent bypass surgery.
Suppose you roll a standard die 2000 times and let X be the sum of the values you get. Using the Central Limit Theorem, for what value of a is P[X >= a] approximately equal to P[N(0,1) >= 2] ?
Which component of a time series is most likely to occur? Which component has a pattern that must be complete in a single year and repeat from year to year?
Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
Give the Z- score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected
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