are female. In a random sample of 100 members, 50% are female. Using 0.05 level of confidence, what is the rejection region? A. The rejection region is the set of values above 1.645 B. The rejection region is the set of values below 1.645 C. The rejection region is the set of values above – 1.645 D. The rejection region is the set of values below – 1.645 44. What does .05 level of significance mean? A. The acceptable error in the study is 95%.
43. A gym instructor claims that at least 70% of the members in the gym are female. In a random sample of 100 members, 50% are female. Using 0.05 level of confidence, what is the rejection region?
A. The rejection region is the set of values above 1.645
B. The rejection region is the set of values below 1.645
C. The rejection region is the set of values above – 1.645
D. The rejection region is the set of values below – 1.645
44. What does .05 level of significance mean?
A. The acceptable error in the study is 95%.
B. The acceptable error in the study is .95.
C. There is less than 5% probability that the null hypothesis is correct.
D. There is more than 5% probability that the null hypothesis is correct.
45. A soft drink vending machine is adjusted so that on average it will automatically dispense 200 ml into a paper cup. However, the actual amount dispensed is not exactly 200 ml. the operations manager obtains a sample of 35 cups of dispensed soda and the mean of his sample is 195 ml. The machine operates with a known standard deviation of 14 ml. At 5% level of significance, what is the appropriate decision rule?
A. Do not reject the null hypothesis if the calculated z – value is equal to 1.96
B. Do not reject the null hypothesis if the calculated z – value is equal to – 1.96
C. Reject the null hypothesis if the calculated z – value is greater than – 1.96 or z – value is less than 1.96
D. Reject the null hypothesis if the calculated z – value is less than – 1.96 or z – value is greater than 1.96
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