MAT 124 Y01 Fall 2021
Name ______________________
Quiz 2 (3.3, 3.4, 6.1, 6.2 D and CI, 4.1) Grade is out of 38 points.
Directions
: Show all necessary work on paper, to be scanned and uploaded to the dropbox within the time limit. You may use StatKey but do not need Minitab. Use the formulas on the Reference Sheet to help you.
1) Given the original sample: 17, 10, 15, 21, 13, 18.
Circle the sample(s) below that constitute a possible bootstrap sample from the original sample.
a) 10, 12, 17, 18, 20, 21
b) 10, 15, 17
c) 10, 13, 15, 17, 18, 21
d) 18, 13, 21, 17, 15, 13, 10
e) 13, 10, 21, 10, 18, 17
[3 pts]
2) State the null and alternative hypotheses for the statistical test described.
Testing to see if there is evidence that a proportion is greater than 0.3.
H
0
:
[2 pts]
H
a
:
[2 pts]
3) Determine if each of the following have a sample statistic whose distribution is approximately normal. State a reason (or show some math) to support your answer.
(Remember for proportions, np ≥ 10 and n(1-p) ≥ 10, and for means n ≥ 30).
A: 163 out of 314 text messages sent by Prof. Congdon’s online Statistics students had no punctuation. B: The number of states visited by a group of 8 students are: 12, 6, 19, 5, 4, 5, 10, 49
