NEW
Font size
Worksheetst distribution
Total questions: 20
Worksheet time: 9mins
What is the t-score associated with 90% confidence and a sample size of 15?
A. 1.341
B. 1.345
C. 1.753
D. 1.761
What is the degrees of freedom equal to?
A. n
B. n + 1
C. n - 1
D. 1 - n
A 90% confidence interval for the mean speed driven by cars on East Main St. is given by (21, 45). What was the sample mean of this study?
A. 12
B. 33
C. 42
D. None of these.
What is the other term for t-distribution?
A. Student’s T-Distribution
B. Probability Distribution
C. Percentile Distribution
D. Z-Distribution
Identify the t-value whose number of samples n = 9 and has an (𝛼) equal to 0.05.
A. 0.261
B. 1.860
C. 1.833
D. 3.355
Find the t-value for a 99% confidence interval with a sample of 23 people.
A. 1.714
B. 2.064
C. 1.711
D. None of these.
T-distribution is a probability distribution used to estimate parameters EXCEPT when________.
A. The population standard deviation is known
B. The sample size is small
C. The population variance is unknown
D. The sample size is small and the population variance is unknown
This refers to the measure of position with data divided into 100 parts.
Percentiles
Deciles
Quartiles
Median
What is the right-tailed area if the confidence interval is 75%?
0.05
0.10
0.005
0.25
What will be the degree of freedom of the data whose sample size is 18?
17
18
19
20
Identify the t-value whose number of samples n = 9 and has an area (𝛼) equal to 0.05
0.261
1.833
1.860
3.355
Identify the t-value whose number of samples n = 2 and has an area (𝛼) equal to 0.40
0.289
0.325
0.277
0.816
Identify the t-value whose number of samples n = 11 and has an area (𝛼) equal to 0.25
0.700
0.697
1.372
0.260
What is the degree of freedom if the sample size is 20?
21
19
20
18
What is the right-tailed area if the confidence interval is 60%?
0.040
0.40
0.004
0.0004
It is used with small samples taken from population that is approximately normal.
z-distribution
t-distribution
population variance
sample mean
