STA301 Midterm MCQs by VU Topper RM

Which of the following method of skewness is a pure number/unitless?

1. Fisher
2. Bowleys
3. Sheppred

D.Pearson

In a linear regression, the degree of scatter of the observed values about the regression line is measured by:

A. Standard error of estimate

B. Median C. Mean D. Mean deviation

The first moment about mean is:

A. 0

B. 1 C. 2 D. All of the above

If a distribution has positive skewness, in what order (highest to lowest) will the averages be?

1. median, mode, mean
2. mean, median, mode
3. mean, mode, median

Correct answer: mean, median, mode

D.mode, median, mean

If we calculate the probability of an event and it turns out to be -.7, we know that:

A. we made a mistake

B. the event is probably going to happen C. . the probability of it not happening is .3 D.the event is probably not going to happen The number of ways in which four books can be arranged on a shelf are:

Relationships among the averages

A. HM<=GM<=AM

B. GM<=HM<=AM C. None of the above D. HM>=GM>=AM

Statistics branches include A. Industry Statistics B. Mathematical Statistics C. Applied Statistics

D. Both Applied and Mathematical

In a frequency distribution the categories must A. Be of the same size B. Mathematical Statistics C. Have at least 5 observations

D. Be mutually exclusive

If the relative frequencies are used, the cumulative frequency polygon rises ________________________

A. From the value 0 at left to the value 1 at right

B. From the value 1 at left toh the value 0 at right C. From the value 0 at right to the value 1 at left D. None of these

According to the property of parameter, it is A. Continuous

B. Constant

C. Discrete D. Variable

Data arrangement in order of magnitude is called: A. Grouped data

B. Arrayed data

C. Frequency distribution D. Raw data

From the following table, what is the Upper limit of the 3 class? Class Frequency 30.0 - 32.9 2 33.0 - 35.9 436.0 - 38.9 14 39.0 - 41.9

Q842. 0 - 44.9 2

1. 42.0
2. 33.0
3. 38.9
4. 35.9

Correct answer: 38.9

Which one of the following is equal to mean in a symmetrical distribution:

A. 50th Percentile

B. 5th Decile C. All of these D. 2nd Quartile

Temperature, in Fahrenheit, is an example of a variable measured on the following scale: A. Ordinal B. Nominal

C. Interval

D. Ratio

If in a set of discrete values, 50 percent values are greater than 25, then