Use z-test at .05. A principal at a school claims that the students in his school are above average intelligence. A random sample of thirty students' IQ scores have a mean score of 112.5. Is there sufficient evidence to support the principal's claim? The mean population IQ is 100 with a standard deviation of 15.

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Activity 5
Use z-test at .05.
A principal at a school claims that the students in his school are above
average intelligence. A random sample of thirty students' IQ scores
have a mean score of 112.5. Is there sufficient evidence to support the
principal's claim? The mean population IQ is 100 with a standard
deviation of 15.
Transcribed Image Text:Activity 5 Use z-test at .05. A principal at a school claims that the students in his school are above average intelligence. A random sample of thirty students' IQ scores have a mean score of 112.5. Is there sufficient evidence to support the principal's claim? The mean population IQ is 100 with a standard deviation of 15.
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