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Suppose that the personnel director in Problem 1 wants to know whether the key- 3. boarding speed of secretaries at her company is different from the national mean of 50.
(a) State H0.
(b) Which form of H1 is appropriate in this instance-directional or nondirectional? (Explain.)
(c) State H1.
(d) Specify the critical values, z.05 and z.01.
Problem 1
The personnel director of a large corporation determines the keyboarding speeds, on 1. certain standard materials, of a random sample of secretaries from her company. She wishes to test the hypothesis that the mean for her population is equal to 50 words per minute, the national norm for secretaries on these materials. Explain in general terms the logic and procedures for testing her hypothesis.
The proportion of left handers is 0.10. What is the number of left handers in the sample and what notation is given to that number? What is the values of p and ^p?
suppose heights of adults measured in inches are normally distributed with mean 70 inches and standard deviation 10
Describe the assumptions of normality and homogeneity of variance. When these assumptions are violated, what are your options?
1.colleges conduct student evaluations of instruction to determine if there are patterns of either excellence or the
Is the mean of the sampling distribution of d‾ always 0? If so, explain why. If not, explain what it means about the population when it is 0.
A psychologist believed that as children get older, they engage in more "inactive activities" such as playing computer games, watching TV, and surfing online.
Sports and Leisure In May 2013 the New York Post published an article about a scheme by wealthy Manhattan mothers to avoid long wait times at Disney World.
1 given that pa and b .4 and pab .8 find pb2 when two cards are drawn from an ordinary deck of 52 playing cards what
Compute simple main effect tests for the type of adult factor at each level of the consequences factor. Use Tukey's HSD to analyze the significant simple.
If a different sample of 100 marathon runners was taken from the same population, which of the following would be the same as it was for the first sample.
Look around your living space or current surroundings and find a quantitative variable for which you can collect at least 20 observations.
michael sullivan son of the author decided to enroll in a reading course that allegedly increases reading speed and
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