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WorksheetsProb & Stats - HW Quiz #2 (1.6 - 1.8)
Total questions: 15
Worksheet time: 1hrs 1mins
2, 57, 38, 42, 6
6, 12, 16, 11, 8, 4, 1, 11, 4
18, 19, 17, 14, 20, 20, 15, 21
What is the shape of this bar graph?
Skew right
Skew left
Symmetrical
uniform
What is the shape of the box plot?
skewed left
skewed right
symmetrical
Given the dot plot's shape, which measure of center should be used?
Mean
Median
Standard Deviation
IQR
TRUE OR FALSE:
Median is not resistant to skew (it is easily "pulled" by an outlier).
TRUE
FALSE
Which is the correct box plot for this data?
What is the IQR of the following Data Set:
32, 35, 35, 36, 39, 40, 44, 48, 49
Q1: 35
Q2: 39
Q3: 46
IQR: 46 - 35 = 11
Q1: 35
Q2: 39
Q3: 44
IQR: 44 - 35 = 9
Q1: 35
Q2: 39
Q3: 48
IQR: 48 - 35 = 13
Q1: 35
Q2: 39
Q3: 46
IQR: 39 - 35 = 4
When using IQR to find outliers, which formula will identify the lower limit?
Q3 - 1.5(IQR)
Q1 + 1.5(IQR)
Q1 - 1.5(IQR)
Q3 + 1.5(IQR)
A realtor wants to give a customer an idea of housing prices in a neighborhood. All the houses are priced within $20,000 of one another, except one house that is much larger and more expensive than the rest. Which measure(s) of central tendency will be most affected by the one expensive house?
Median only
Use the 1.5 IQR rule to determine if there are any outliers for the following numbers:
84, 88, 72, 74, 98, 38, 125
Yes, but only 38 is an outlier.
Yes, both 38 and 125 are outliers.
Yes, but only 125 is an outlier.
There are no outliers.
What percentage of the data is between 90 and 140?
25 %
50%
75%
100%
What percentage of the data is between 40 and 90?
25 %
50%
75%
100%
The box-and-whisker plots below show the scores earned by 6th and 7th graders on a year-end reading test.
Which statement is best supported by the box-and-whisker plots?
The range of the 7th grade scores is greater than the range of the 6th grade scores.
The median of the 6th grade scores is greater than the median of the 7th grade scores.
The mean of the 7th grade scores is less than the mean of the 6th grade scores.
The number of 6th graders who took the test is greater than the number of 7th graders who took the test.
