a The National Institute on Alcohol Abuse and Alcoholism reported that 46.7% of

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  a The National Institute on Alcohol Abuse and Alcoholism reported that 46.7% of eighth-graders had used alcohol. A random sample of 150 eighth-graders showed that 85 of them had used alcohol. To test the claim that at a 1% significance level whether the population proportion has changed, compute the P value for this test. A. 0.014 B. 0.007 C. 0.028 D. 0.410 b. Suppose for a particular hypothesis test, a = 0.05 and the P value = 0.06. Which of the following statements is TRUE?       A. We reject the null hypothesis.           B. We fail to reject the null hypothesis.             C. The observed result is “unusual”.           D. The computed test statistic, z, does fall in the shaded critical region of the tail in the normal curve. c . A hypothesis test is conducted to determine if the mean GPA of FHSU students is greater than 2.70. After the test is complete, the researcher rejected the null hypothesis. Which conclusion below best describes the end result of the hypothesis test? A. Conclude that the mean GPA is not equal to 2.70 B. Conclude that the mean GPA is equal to 2.70 C. Conclude that the mean GPA is less than 2.70 D. Conclude that the mean GPA is greater than 2.70     d. A correlation coefficient of r = -0.98 between two quantitative variables A and B indicates that             A. As A increases, B tends to increase.             B. Changes in A cause changes in B.    C. As A increases, B tends to decrease.             D. There is a very weak association between A and B, and change in A will not affect B.   a The National Institute on Alcohol Abuse and Alcoholism reported that 46.7% of eighth-graders had used alcohol. A random sample of 150 eighth-graders showed that 85 of them had used alcohol. To test the claim that at a 1% significance level whether the population proportion has changed, compute the P value for this test. A. 0.014 B. 0.007 C. 0.028 D. 0.410 b. Suppose for a particular hypothesis test, a = 0.05 and the P value = 0.06. Which of the following statements is TRUE?       A. We reject the null hypothesis.           B. We fail to reject the null hypothesis.             C. The observed result is “unusual”.           D. The computed test statistic, z, does fall in the shaded critical region of the tail in the normal curve. c . A hypothesis test is conducted to determine if the mean GPA of FHSU students is greater than 2.70. After the test is complete, the researcher rejected the null hypothesis. Which conclusion below best describes the end result of the hypothesis test? A. Conclude that the mean GPA is not equal to 2.70 B. Conclude that the mean GPA is equal to 2.70 C. Conclude that the mean GPA is less than 2.70 D. Conclude that the mean GPA is greater than 2.70     d. A correlation coefficient of r = -0.98 between two quantitative variables A and B indicates that             A. As A increases, B tends to increase.             B. Changes in A cause changes in B.    C. As A increases, B tends to decrease.             D. There is a very weak association between A and B, and change in A will not affect B.

Explanation / Answer

b) Ans (B) we fail to reject null hypothesis as p>0.05 the we cannot reject null hypothesis

c)ans (D) because here we take null hypothesis as mean GPA of FHSU students is 270 aginist alternative hypothesis mean GPA of FHSU students is greaterthan 270 . As we are rejecting null hypothesis we accept alternative hypothesis.

d) ans (B) changes in A cause changes in B as it is negative correlation between A and B as 98% so if A changes then B changes in opposite direction

a) we need some more information

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