Consider a random variable, z, that has a standardized normal distribution. Determine (-2 z 3 ).
A) 0.12414
B) 0.97587
C) 0.47722
D) 0.49865
Q. 2In conducting a hypothesis test for the difference between two population means where the standard deviations are known and the null hypothesis is:
H0 : A - 0
What is the p-value assuming that the test statistic has been found to be z = 2.52?
A) 0.0059
B) 0.9882
C) 0.0118
D) 0.4941
Q. 3Recently, a report in a financial journal indicated that the 90 percent confidence interval estimate for the proportion of investors who own one or more mutual funds is between 0.88 and 0.92.
Given this information, the sample size that was used in this study was approximately 609 investors. Indicate whether the statement is true or false
Q. 4The owners of Greg's Department Store have reason to believe that one of their employees has been stealing from the store. In an interview with the police, the owner says that she is 75 percent sure that the employee is stealing.
This probability is an example of one that was assessed using classical probability. Indicate whether the statement is true or false
Q. 5Which of the following is an example of quality control attributes?
A) the weight of a carton of cereal
B) number of defective pieces in a shipment of parts
C) inside diameter of drilled hole
D) the time between an order and its delivery
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