CNSL 503 STATISTICS PORTAGE EXAM 5
Questions and Guide Answers
100% Verified Graded A+
1. Using the z-test requires that we know...
Answer: standard deviation
2. When the standard deviation is unknown, we estimate it using...
Answer: the sample
standard deviation (s)
3. When we use s instead of σ, the distribution of the sample means is no
longer .
Answer: normal
4. Instead of the normal distribution, the distribution of sample means when σ
, is estimated using s follows a...
Answer: t distribution (aka student distribution)
5. The t distribution is...
Answer: symmetrical with most scores centered around the mean
6. The shape of the t distribution changes depending on the...
Answer: degrees of freedom
7. degrees of freedom
Answer: the number of scores in the sample that are independent
8. degrees of freedom formula
Answer: df= n-1
9. As sample size increases, degrees of freedom and the variability in
sample means .
Answer: increases, decreases
10. one sample t-test
Questions and Guide Answers
100% Verified Graded A+
1. Using the z-test requires that we know...
Answer: standard deviation
2. When the standard deviation is unknown, we estimate it using...
Answer: the sample
standard deviation (s)
3. When we use s instead of σ, the distribution of the sample means is no
longer .
Answer: normal
4. Instead of the normal distribution, the distribution of sample means when σ
, is estimated using s follows a...
Answer: t distribution (aka student distribution)
5. The t distribution is...
Answer: symmetrical with most scores centered around the mean
6. The shape of the t distribution changes depending on the...
Answer: degrees of freedom
7. degrees of freedom
Answer: the number of scores in the sample that are independent
8. degrees of freedom formula
Answer: df= n-1
9. As sample size increases, degrees of freedom and the variability in
sample means .
Answer: increases, decreases
10. one sample t-test
