STAT200 Week 2 HW
Lane et al. Book
7. For the data from the 1977 Stat. and Biom. 200 class for eye color, construct:
a. pie graph
b. horizontal bar graph
c. vertical bar graph
d. a frequency table with the relative frequency of each eye color
Eye Color
Number of Students
Brown
11
Blue
10
Green
4
Gray
1
26
9. Which of the box plots on the graph has a large positive skew? Which has a large negative skew?
6. You recorded the time in seconds it took for 8 participants to solve a puzzle. These times
Appear below. However, when the data was entered into the statistical program, the score that
Was supposed to be 22.1 was entered as 21.2. You had calculated the following measures of
central tendency: the mean, the median, and the Mean trimmed 25%. Which of these measures
of central tendency will change when you correct the recording error?
Time (seconds)
15.2
18.8
19.3
19.7
20.2
21.8
22.1
29.4
8. You know the minimum, the maximum, and the 25th, 50th, and 75th percentiles of a
distribution. Which of the following measures of central tendency or variability can you
determine? Mean, median, mode, trimean, geometric mean, range, interquartile range, variance,
standard deviation
30.(AT) What is the mean number of correct responses of the participants after taking the placebo (0 mg/kg)?
31.(AT) What are the standard deviation and the interquartile range of the d0 condition?
Illowsky et al. Book
78. Twenty-five randomly selected students were asked the number of movies they watched the previous week. The results
are as follows.
a. Construct a histogram of the data.
b. Complete the columns of the chart.
Use the following information to answer the next two exercises: Suppose one hundred eleven people who shopped in a special t-shirt store were asked the number of t-shirts they own costing more than $19 each.
80. If the data were collected by asking the first 111 people who entered the store, then the type of sampling is:
a. cluster
b. simple random
c. stratified
d. convenience
Given the following box plot:
88. Given the following box plots, answer the questions.
Figure 2.45
a. In complete sentences, explain why each statement is false.
i. Data 1 has more data values above two than Data 2 has above two.
ii. The data sets cannot have the same mode.
iii. For Data 1, there are more data values below four than there are above four.
b. For which group,
STAT200 Week 2 HW
Lane et al. Book Chapter 2&3 Q...
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