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Question: Combining scores again. The first Stat exam had a mean of 80 and a standard deviation of 4 points; the second had a mean of 70 and a standard deviation of 15 points. Reginald scored an 80 on the first test and an 85 on the second. Sara scored an 88 on the first but only a 65 on the second. Although Reginald s total score is higher, Sara feels she should get the higher grade. Explain her point of view.
An airplane manufacturer currently produces six models of airplanes for commercial sale. the airline that lauren works for is rapidly expanding and would like to purchase three airplanes of different models to service various routes.
If is the proportion of the next 100 shoppers that buy a packet of the crackers after tasting a free sample, then the probability that fewer than 30% buy a packet after tasting a free sample is approximately.
multiple choice question based on multiple regression.1. below you are given a partial computer output based on a
a player of a video game is confronted with a series of opponents and has an 83 probability of defeating each one.
a nonprofit company concerned with the school dropout rate in a nearby state has designed a tutoring program aimed at
question 1 a psychologist has to develop a new test of spatial perception and she wants to estimate the mean score
Suppose that we are interested in the proportion of the 70 students in the lunchroom cafeteria that smokes. Is the normal approximation for the proportion p = r/n valid?
The probability that a call-centre consultant receives 3 calls during any given hour is 0.1404 and the probability that the consultant receives 5 calls during any given hour is 0.1755. Assuming that the calls are Poisson-distributed, calculate the p..
many retails stores offer their own credit cards. at the time of the credit application the customer is given a 10
Assume that samples of size 2 are randomly selected with replacement from this population of four values. The first samples selected is 11,9. What is the mean of the sampling distribution of means?
in a market research study conducted by a local winery on white wine preference the following results were found. of a
Formulate a statistical hypothesis appropriate for the consumer groups purpose - Compute the mean average miles per gallon and compute the sample variance and sample standard deviation.
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