It is the ratio of the number of successes (or desired outcome) divided the
number of sample observations.
It is the ratio of standard deviation divided by the number of sample
observations.
It is the ratio of standard deviation divided by the range.
In _________, the samples chosen at random are not related to each other.
In a fivestep procedure that systematizes hypothesis testing, what is the final step?
III. Select a sample, compute the value of the test statistic, make a decision regarding
the null hypothesis, and interpret the results.
Suppose the alternative hypothesis in a hypothesis test is "the population mean is not
equal to 75". If the sample size is 100 and alpha is .05, the critical value (/s) of z is (/are):
Selected
Answers:
1.645
+1.645 &
1.645
1.96
+1.96 &
1.96
Which of the following is NOT an assumption of ANOVA test?
Which of the following is
NOT
a factor in choosing an appropriate sample size?
.
The volume of detergent in a standard dispenser bottle is normal with a known standard
deviation of 0.10 litres. 25 bottles were randomly selected from the production line and
found the sample mean to be 1.50.
State
the 95% confidence interval for the mean of
the population.
(1.46,
1.54)
Suppose you are testing the null hypothesis that a population mean is greater than or
equal to 24, against the alternative hypothesis that the population mean is less than 24.
The sample size is 64 and alpha is .05. The sample mean is 22 and the sample standard
deviation is 8. What is the calculated z value?
Answers:
Selected
Answer:

2.0
0
1.0
0

1.0
0
2.0
0

2.0
0
If the alternative hypothesis in a hypothesis test includes phrases like “higher”, “lower”,
“has reduced” or “has increased”, the test should be
Answers:
I only
II only
III only
None of the listed
choices.
A professor in Economics has a hunch that the average score of his students has
increased and is now above 65 marks (from a maximum of 100 marks). To conduct a
hypothesis test for this, the null hypothesis would be
The population mean is
=< 65
The population mean is
= 65
The population mean is
> 65