1.Excel’s __________ function can be used to compute the sample variance.
A) VAR.S
2.A mean computed in such a way that each data value is given a weight reflecting its importance is referred to as
A) A weighted mean
3.refer to picture: The median is
A) 6
4.The 50th percentile is
A) the median
5.Excel’s __________ function can be used to compute the sample standard deviation.
A) STDEV.S
6.The __________ denotes the number of standard deviations xi is from the mean xbar.
A) z-score
7.Excel’s __________ function can be used to compute the sample covariance.
A) COVARIANCE.S
8.μ is an example of a
A) Population parameter
9.The empirical rule states that, for data having a bell-shaped distribution, the percentage of data values being within two standard deviations of the mean is approximately
A) 95
10.The symbol σ 2 is used to represent the
A) variance of the population
11.Which of the following symbols represents the standard deviation of the population?
A) σ
12.The symbol σ is used to represent the
A) standard deviation of the population
13.refer to the picture: the mean is?
A) 7
14.A(n) __________ is an unusually small or unusually large data value.
A) outlier
15.Excel provides functions for computing the
A) Excel provides functions for all of these.
16.If a data set has an even number of observations, the median
A) is the average value of the two middle items when all items are arranged in ascending order
17.refer to the picture: what is the mode?
A) 5
18.The empirical rule states that, for data having a bell-shaped distribution, the percentage of data values being within one standard deviation of the mean is approximately
A) 68
19.The 75th percentile is also the
A) third quartile
20.The median of a sample will always equal the
A) the 50th percentile
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