Question of Chapter: Data Description
1. The smallest value is possible to the non-outlier values for the data is
shown in the next boxplot,
0.5
1.5
2.5
4
2. The difference between a x̄ and a μ is due to ___________
Sampling error
Sampling distribution
standard error of the mean
no answer
3. If the data values are evenly distributed on both sides of the mean,
then the distribution is _____________ skewed.
Negatively
Symmetric
no answer
Positively
4. The mean of the waiting time in an emergency room is 80.9
minutes with a standard deviation of 11 minutes for people who are
admitted for additional treatment. The mean of the waiting time for
patients who are discharged after receiving treatment is 113.2
minutes with a standard deviation of 19.6 minutes. Which waiting
time are more variable?
The waiting time for patients who are discharged after receiving
treatment are more varibale
The two waiting time have same varibale
we cannot determine
The waiting time in an emergency room are more varibale
5. _______________ is an extremely high or an extremely low data
value when compared with the rest of the data values.
A z score
Percentiles
An outlier
There is no answer
6. Using the grades X1, X2, X3, X4, X5, X6, X7 , where X1 < X2 < X3 <
X4 < X5 < X6 < X7
to find the percentile rank of a grade of X6
74.57th
81.57th
78.57th
80.57th
7. Given this boxplot
The median is _____
8
9
7
10
8. The value corresponding to the 25th percentile is _____
7
4
6
5
9. The average score on a state CDL license exam is 75 with a standard
deviation of 4. Find the corresponding z score for score 67.
-2
-5
-4
-1
10. Which has a better relative position: a score of 70 on an english
test with a mean of 52 and a standard deviation of 10 or a score of 35
on an arabic test with a mean of 26 and standard deviation of 5 ?
A score of english test is better than a score of arabic test
A score of arabic test is better than a score of english test
The two scores are the same
We can not determine
11. 9, 32, 13, 38, 19, 41
The Q2 =
51
32
25.5
19
12. 20, 32, 45, 11, 6, 36
The Q1 =
20
11
32
6
13.
37, 3, 43, 17, 21, 27
The Q3 =
43
37
27
21
14. 7, 22, 17, 44, 33, 38
The IQR =
22
21
24
19