Question 1 You arrived at a significant test statistic (p-value < 0.05)
when comparing responses from three treatment groups in a one-way
ANOVA. How would you interpret the alternative hypothesis for this test?
Group of answer choices
The mean responses from all three treatment groups are different
None of the other answers is true
The mean responses from all three treatment groups are the same
The mean response from at least one treatment group is different from that
of the others
Question 2
Which of the following proposition describes an existing theory or belief?
Group of answer choices
Null hypothesis
Alternative hypothesis
Standard deviation
Proportion
Question 3
Which of the following is not a continuous random variable?
Group of answer choices
The outcomes of rolling two dice
The possible amount of rain on a given day
The time to complete a specific task
The pollution level (measured in air quality index) in the air around us
Question 4
Which of the following is a Type-II error?
Group of answer choices
The null hypothesis is actually true, but the hypothesis test incorrectly
rejects it.
The research hypothesis is actually true, but the test correctly rejects the null
hypothesis.
The research hypothesis is actually true, and the test incorrectly fails to
rejects null hypothesis
The null hypothesis is actually true, and the hypothesis test correctly fails to
reject it.
Question 5
Which of the following is a difference between the t-distribution and the
standard normal (z) distribution?
Group of answer choices
The standard normal distribution is dependent on parameters like degree of
freedom, while t-distribution is not.
The standard normal distributions' confidence levels are wider than those of
the t-distribution
The t-distribution cannot be calculated without a known standard deviation,
while the standard normal distribution can be.
The t-distribution has a larger variance than the standard normal distribution
Question 6
The WPC Sports Company has noted that the size of individual "customer order" is
normally distributed with a mean of $100 and a standard deviation of $10. If a soccer
team of 25 players was to make the next batch of orders, what would be the standard
error of the mean?
Group of answer choices
3.00
10.00
2.00
3.46
Question 7
What is the confidence interval when the level of significance is 0.06?
Group of answer choices
0.093
7%
0.930
0.940
Question 8
In order to reject the null hypothesis, the p-value must be less than the
Group of answer choices
Standard deviation
Variance
Degrees of freedom
Alpha
Question 9
When sample size increases
Group of answer choices
Standard deviation of the sample mean increases
Confidence interval remains the same
Confidence interval decreases
Confidence interval increases
Question 10
The central limit theorem states that if the population is normally distributed,
then the
Group of answer choices
Mean of the population can be calculated without using samples
Standard error of the mean will not vary from the population mean
Sampling distribution of the mean will also be normal for any sample size
Sampling distribution of the mean will vary from the sample to sample
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