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A professor is interested in whether there is a gap in counseling students' statistics competency scores between 1) those who have never taken any statistics course, 2) those who have only taken an undergraduate statistics course, 3) those who have taken COUN 503, and 4) those who have takenan advanced statistic course whereas working on a Ph. D. The professor gathers information from a random sample of students and obtains the statistics competency scores. The scoresare normally distributed.
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2)
3)
4)
7
11
13
15
6
14
8
10
5
12
4
a. What statistical test should be used to examine these data?
b. Identify H0 and Ha for this study.
c. Conduct the exactly analysis.
d. Should H0 be rejected? What should the researcher conclude?
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In June 2009, the average Australian credit card account balance was $3,127, according to data extracted Assuming that these balances are approximately Normally distributed with a
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It is a numerical average, as equal to the sum of terms in a given series divided by the number of terms in that series is the mean which is also called the expected value.
How to write it with business implication of the analysis?
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