A shot-put player records the following scores, 16.8 m, 16.9 m, 17.1 m, 17.2 m, 17.8 m, 17.9 m, 18.2 m, 18.3 m, 18.3 m, 18.5 m. Find the 10% trimmed mean.
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1%
16
9%
16.71
4%
17
86%
17.71
When constructing a comparative bar graph we use the ............. rather than the ............
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15%
frequency , relative frequency
83%
relative frequency , frequency
2%
None
The mean, median, or mode by itself is usually a sufficient measure to reveal the shape of the distribution of a data set.
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38%
T
62%
F
is the simplest measure of dispersion to calculate
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13%
Mean
1%
Median
79%
Range
7%
Mode
The greater the amount of variability in the sample, the larger the magnitudes (ignoring the signs) of the deviations.
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92%
T
8%
F
is the most-used measure of dispersion.
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14%
DEVIATION
54%
standard deviation
32%
both
In general, a Large value of the standard deviation for a data set indicates that the values of that data set are spread over a relatively smaller range around the mean.
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44%
T
56%
F
A particular deviation is positive if the corresponding x value is greater than x bar and negative if the x value is less than x bar
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86%
T
14%
F
The standard deviation of the widths (in cm) of a group of 25 leaves is 0.9 cm. What is the variance of their widths?
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12%
5
14%
0.3
68%
0.81
7%
8.1
The heights of a group of 6 people are 150 cm, 1 55 cm, 160 cm, 165 cm, 170 cm, and 175 cm. Find the standard deviation of their heights.
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10%
8.78
69%
8.53
8%
7.96
13%
9.12
Find the standard deviation of the following data (rounded off to two decimal places). 5,3,4,7
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70%
1.48
7%
3.21
9%
4.12
14%
2.45
If the standard deviation of a, b and c is t, then what will be the standard deviation of a + 6, b+6 and c+ 6 ?
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41%
t
32%
t+6
12%
a+b+c
14%
6t
empirical rule applies only to a specific type of distribution called a bell - shaped distribution .
Anonymous Quiz
95%
T
5%
F