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A loaf of bread is normally distributed with a mean of 22 oz. and a standard deviation of 0.5 oz. What is the probability that a loaf is less than 22.25 oz.?
.1915
.8413
.7257
.6915
.3085
In testing equality of two means below, determine the test statistic? (Use the equal variances formula)
Increasing the confidence-interval level from .95 to .99
The following data are based on information from Domestic affairs. Let X be the average number of employees in a group helh insurance plan, and let Y be the average administrative cost as a percentage of claims.
Political prisoners Mathew, Mark, and Luke are told that two of the three are to be executed. Matthew takes the jailer aside and says, "We both know that at least one of the others, Mark or Luke, will be executed
To test whether or not there is a difference between treatments A, B, and C, a sample of 12 observations has been randomly assigned to the 3 treatments.
A producer of pleasure boats wants to maximize revenue during the next month. Two types of boats are sold, x1 and x2. Type x1 sells for $40,000 and type x2 sells for $30,000. The x1 boats require 10 weeks of labor and 600 board feet of lumber each..
Use the marginal probabilities of school quality, school cost or convenience, and other to comment on the most important reason for choosing a school.
A certain police officer stops cars for speeding. The number of red sports cars she stops in one hour is a Poisson process with rate 4, while the number of other cars she stops is a Poisson process with rate 1.
Discuss three measures of central tendency for the dependent variable. Is this distribution skewed? If so, in what direction? Explain your answer. Why would you NOT attempt to determine the central tendency of the independent variables?
What is the probability that the mean starting salary is between $31,000 and $33,000 - Graduates from a graphic arts course at a community college have a mean starting salary
Estimating the individual score using normal distribution - blood pressure higher than what amount?
Using symbols state hypotheses (H 0 and H 1 ) for two-tailed test. Sketch suitable distribution and locate critical region for a = 0.05.
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