of young men asure the blood cholesterol of 24 cro is the same as in the general
ID: 3340778 • Letter: O
Question
of young men asure the blood cholesterol of 24 cro is the same as in the general population. with standard deviation -41 milligrams per deciliter. You met runners. The mean level is 8-172 mg/dL Assume that Create a 95% confidence ioterval for the cross-country runners. Table C is attached. level among ' 2±146(2.269) 132-16.4 3 Experiments on learning in animals sometimes measure how long it takes mice to find their way through a maze. The mean time is 18 seconds for one particular maze. A researcher thinks that a loud noise will cause the mice to complete the maze faster. She measure how long each of 10 mice takes with a noise as stimulus. The sampl mean is i = 16.5 seconds, what are her null and alternative hypotheses? tatistical test of hypotheses, we say the data are statistically significant at level a if: 0.05 0.05 ol. is small the P-value is less than the P-value is larger thanExplanation / Answer
Question 4
95% confidence interval = x +- Z (/sqrt(n))
= 172 +- 1.96 * (41/ sqrt(24)
= 172 +- 1.96 * 8.369
= 172 +- 16.403
= (155.597, 188.403)
Question 5
Null HYpothesis : H0 : There is no effect of a loud voice on time taken by a mice to complete the maize faster. = 18 sec
Alternative Hypothesis : Ha : There is a siginificant decrease in time taken by a mice to complete the maize faster when it hear a loud voice. < 18 sec
Question 6
data is statistically significant if the p - value is less than alpha . Option C is correct.
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