Scores on a certain "IQ" test for 18-25 year olds are normally distributed. A researcher believes that the average IQ score for students at a certain NJ college is less than 110 points, and so wants to test this hypothesis. The researcher obtain a SRS of 45 student IQ scores from school records and found the mean of the 45 results was 108 with a sample standard deviation of 21. The level of significance (alpha) used for this problem is 0.05. What are the assumptions required to be valid for the hypothesis tests to be valid? Note: When mak- ing a statement involving the random variable, it must be put in actual context and be specific. .

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Scores on a certain “IQ" test for 18-25 year olds are normally distributed. A researcher believes that the
average IQ score for students at a certain NJ college is less than 110 points, and so wants to test this
hypothesis. The researcher obtain a SRS of 45 student IQ scores from school records and found the
mean of the 45 results was 108 with a sample standard deviation of 21. The level of significance (alpha)
used for this problem is 0.05.
What are the assumptions required to be valid for the hypothesis tests to be valid? Note: When mak-
ing a statement involving the random variable, it must be put in actual context and be specific. .
a. sainple based on 18-25 year olds
b. random sampling and scores for 18-25 year olds normally distributed
c. separate male and female scores collected
d. collection of data is done by students same age
a
Transcribed Image Text:Scores on a certain “IQ" test for 18-25 year olds are normally distributed. A researcher believes that the average IQ score for students at a certain NJ college is less than 110 points, and so wants to test this hypothesis. The researcher obtain a SRS of 45 student IQ scores from school records and found the mean of the 45 results was 108 with a sample standard deviation of 21. The level of significance (alpha) used for this problem is 0.05. What are the assumptions required to be valid for the hypothesis tests to be valid? Note: When mak- ing a statement involving the random variable, it must be put in actual context and be specific. . a. sainple based on 18-25 year olds b. random sampling and scores for 18-25 year olds normally distributed c. separate male and female scores collected d. collection of data is done by students same age a
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