(b) The expected value of a randons variable can only be poeltive (e) In a frequ

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(b) The expected value of a randons variable can only be poeltive (e) In a frequency distribution, the class width is the distance betwees the lower and upper limits of a class (d) About one quarter of a data set falls below Qs (e) s may be different from median in an ordered dats set. (f) The mode and range are both measures of varistion. (g) For the same sample statistics, the 90% level of confidence would produce the wider confidence interval than the 95% level of confidence. (h) In a hypothesis test, you assume the alternative hypothesis is true. () A large P-value in a test will favor rejection of the null hypothesis. (i) In most applications, continuous random variables represent counted data, while discrete random variables represent measured data

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a) True

The interval between values is not interpretable in an ordinal measure. In interval measurement the distance between attributes does have meaning. For example, when we measure temperature (in Fahrenheit), the distance from 30-40 is same as distance from 70-80. The interval between values is interpretable.

b) False

It can be negative too

c) True

The class width is the difference between the upper or lower class limits of consecutive classes. All classes should have the same class width.

d) True

One of the three points that divide a range of data or population into four equal parts. The first quartile (also called the lower quartile) is the number below which lies the 25 percent of the bottom data.

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