What advantages do nonparametric statistics have over parametric methods?
Q. 2A random variable x is normally distributed with a mean of 150 and a variance of 36 . Given that x = 120, its corresponding z-score is 5.0.
Indicate whether the statement is true or false
Q. 3If we reject the null hypothesis, we conclude that:
a. there is not enough statistical evidence to infer that the alternative hypothesis is true
b. there is enough statistical evidence to infer that the alternative hypothesis is true
c. there is not enough statistical evidence to infer that the null hypothesis is true
d. there is enough statistical evidence to infer that the null hypothesis is true
e. the test is statistically insignificant at whatever level of significance the test was conducted at
Q. 4Briefly discuss the assumptions for inferences about the median of paired differences using the sign test.
Q. 5The mean and standard deviation of a normally distributed random variable which has been standardized are one and zero, respectively.
Indicate whether the statement is true or false
Q. 6A government testing agency studies aspirin capsules to see if customers are getting cheated with capsules that contain lesser amounts of medication than advertised. Suppose the testing agent concludes the capsules contain a mean amount below the advertised level when in fact the advertised level is the true mean. Which type of error, if any, did the testing agency commit?
a. This is a Type I error.
b. This is a Type II error.
c. This is a Type O error.
d. This is a correct decision.
e. Need more information to answer this question.
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