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The traditional view about the normal curve in psychology is that normal curves are:
A) rare in nature, but often occur in psychological studies.
B) almost guaranteed because of the way psychological measures are developed.
C) common in nature, but commonly used psychological measures rarely yield normally distributed scores.
D) rare both in nature and in the distributions of the scores in psychological research.
The U.S. Congress enacted legislation in 2005 authorizing Block Grants to cities as part of an Anti-Crime initiative. The grant monies are to be used to hire additional police officers for conducting beat patrols in high crime areas.
There're several advantages of using a paired t-test. Since the same subjects are being tested in each of the varying conditions, those subjects serve as their own control.
a) Do a test to see if workers attitudes on this matter have changed using a 90% alpha. b) Explain to management what your findings are and what this suggests about future decisions vs work options.
Define Yt = et for t not= 1 and Yt = 1/sqrt2 (e_t-1_squared - 1) for t=1. Show that Yt is a white noise process despite the fact that Y1 is perfectly predictable from the earlier observation.
Assume you randomly sample one mouse from the colony. The probability his age will be between 55 and 70 days is?
A particular factory can only inspect 46 mice per hour with a standard deviation of 10. At alpha=0.02 company have reason to believe that these inspectors are slower than average?
Let"s consider the very large database of individual incomes from the Bureau of Labor Statistics as our population. It is strongly right skewed. How large a sample size?
Construct a cross tabulation to examine the relationships between the two nominal/ordinal level variables. Assume that you selected a random sample of two hundreds cases and collected data on these cases.
A presidential candidate's aide estimates that, among all college students, the proportion p who intend to vote in the upcoming election is at least 70%.
What is the type of test of significance? 2. Indentify the null and alternative hypothesis. 3. which hypothesis is the claim? 4.What's the test statistic?
The Federal minimum wage is $7.25 (effective July 2009). If an employee earns the new minimum wage, how many complaints can that employee expect to receive?
Suppose normality, determine a 90% confidence interval for population variance.
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