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Where people turn to for news is different for various groups. A study indicated where different age groups primarily get their news:
AGE GROUP
MEDIA
Under 36
36-50
50+
Local TV
107
119
133
National TV
73
102
127
Radio
75
97
109
Local Newspaper
52
79
Internet
95
83
76
At the 0.05 level of significance, is there evidence of a significant relationship between the age groups and where people primarily get their news? If so explain the relationship.
Find out the range (R), variance (V) and standard deviation (s) for the given set of values:
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In which of the following situations is bootstrapping (and other resampling methods) often used and Which of the following is a valid description of the bootstrapping method.
What are the expected value and variance of the following probability distribution?
Compare your best difference to the result from an ordinary two-sample t-test between these groups. Comment the difference.
A bank's loan officer rates applicants for credit. The ratings can be described by a Normal model with a mean of 200 and a standard deviation of 50.
Assume the data for the three groups are independent and the data are approximately Normal. The P-value is less than 0.01. The correct conclusion is that
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At α = .05, is there a difference in variances? Illustrate all steps clearly, including the illustration of the decision rule.
The summation sign is usually represented by:
Is there evidence of difference in median performance between two methods? (Use α = 0.05.)
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