Reference no: EM132858114
1.) For a data set with an odd number of observations that have been sorted from smallest to largest values, where is the median located?
nn/2(n + 1)/2n + ½
2.) Which one of the following is referred to as the population mean?
µ
s
σ
χ
3.) The distribution of a sample of the outside diameters of PVC pipes approximates a symmetrical, bell-shaped distribution. The arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. About 68% of the outside diameters lie between what two amounts?
13.5 and 14.5 inches
13.0 and 15.0 inches
13.9 and 14.1 inches
13.8 and 14.2 inches
4.) On a finance exam, 15 accounting majors had an average grade of 90. On the same exam, 7 marketing majors averaged 85, and 10 finance majors averaged 93. What is the weighted mean for all 32 students taking the exam?
89.84
89.33
89.48
10.67
5.) The sample variance of hourly wages was 10. What is the sample standard deviation?
$1.96
$4.67
$3.16
$10.00
6.) A disadvantage of using an arithmetic mean to summarize a set of data is that __________.
The arithmetic mean sometimes has two values
It can be used for interval and ratio data
It is always different from the median
It can be biased by one or two extremely small or large values