75 Questions | Total Attempts: 113  Settings  Quiz

• 1.
Which of the following is true with regard to samples?
• A.

For a sample to be random it must be obtained in such a way that each possible same of the same size has an equal probability of being selected from the population.

• B.

Characteristics of random samples drawn from a given population will vary from sample to sample.

• C.

The results obtained from large random samples tend to vary less than those from smaller samples.

• D.

All of the above

• E.

A and b

• 2.
The position of Minium's median is the same as that of the classical median
• A.

Always

• B.

Never

• C.

Only when working from the frequency distribution

• D.

• 3.
The sum of the deviations from the mean is always zero
• A.

True

• B.

False

• C.

-

• 4.
Which of the following statememts is true regarding the mean
• A.

The mean is sensitive to the presence or absence of extreme scores

• B.

The mean is responsive to the exact position of each score in the distribution

• C.

The mean may be thought of as the balance point of the distribution

• D.

All of the above

• E.

A and c

• 5.
Which of the following graphical diplays is used for graphing the comulative frequecy distibution of a population?
• A.

Ogive

• B.

Frequency polygon

• C.

Frequency curve

• D.

All

• E.

A and c

• 6.
Comparing the following which is always the largest
• A.

The standard deviation

• B.

Interquartile range

• C.

The semi interquartile range

• D.

Range

• E.

• 7.
In a postivily skewed distribution the second quartile is closer to the first quartile than it is to the third
• A.

True

• B.

False

• C.

-

• 8.
Which of the following scales of measurement has an absolute zero point
• A.

Ordinal

• B.

Nominal

• C.

Ratio

• D.

Interval

• E.

None

• 9.
The average of the squared devations from the mean is known as
• A.

Range

• B.

Variance

• C.

Standard deviation

• D.

Absolute devation

• E.

None

• 10.
A parameter is a descriptive index of a ----; while a statistic is a descriptive index of a -----.
• A.

Sample,population

• B.

Population,sample

• C.

Frequency distribition, sample

• D.

Population,frequency distribution

• 11.
The --- of a particular score is defined as the percentage of individual scores or cases in the distribution at or below that score or value
• A.

Percentile rank

• B.

Range

• C.

Projectile

• D.

All

• E.

None

• 12.
When the shape of the distibution determined by the relative positiooning of the measures of central tendency differs from that provided by the relative positioning of the quartiles, which one is the most accurate?
• A.

The relative positioning of the quartiles

• B.

The relative positioning of the measures of central tendency

• C.

Both

• D.

• 13.
Which of the following statements is true regarding the frequency distribution
• A.

The class intervals are mutually exclusive

• B.

All class intervals of a frequency distribution should be the same width

• C.

There should be no fewer than 5 classes

• D.

All of the above

• E.

A and c

• 14.
A distubution is positively skewed when
• A.

There is only one mode

• B.

The mean minus the median results in a positive number

• C.

The median minus the mean is a positive number

• D.

A and b

• E.

A and c

• 15.
When an actual statistic deiffers froma weighted statistic, which one is more accurate?
• A.

Actual statistic

• B.

Weighted statistic

• C.

A and b

• D.

• 16.
The middle 50 % of the observation falls
• A.

Within 3 standard deviations of the mean of a normal distubition

• B.

Within one standard devaion of the mean of a normal distribution

• C.

Within 2 standard deviations of the mean of a normal distribution

• D.

Within the interquartile range

• E.

None

• 17.
Chebyshev's theorem is used in conjunction with which of the following
• A.

Normal distributions

• B.

Positively skewed distributions only

• C.

Neg skewed distributions only

• D.

Any non normal distribution

• E.

• 18.
Which of the following is similar to the histogram except that the space appears between the rectangles, thus properly suggesting the essential discontinuity of the several categories
• A.

Bar diagram

• B.

Frequency polygon

• C.

Pie chart

• D.

Frequency curve

• E.

None

• 19.
It is acceptable to override sturges rule and create aother class
• A.

Always

• B.

Never

• C.

Only when after applying struges rule our date exceeds the upper class limit of the last class

• 20.
The class width is equal to the difference between the upper and lower limits of any class
• A.

True

• B.

False

• 21.
Which of the following scales of measurement is to be used when the observations are ranked
• A.

Ordinal

• B.

Nominal

• C.

Ratio

• D.

Interval

• E.

None

• 22.
Which of the following statisics is most affected by outliers
• A.

Mean

• B.

Median

• C.

Mode

• D.

All

• E.

None

• 23.
Which of the following is true according to king, rosopa, and minium
• A.

Both the histogram and the frequency polygon are used for graphing quantitative date on an interval or ratio scale

• B.

A histogram is often used when graphing an ungrouped frequency distribution of a discrete variable

• C.

A polygon is often preferred for grouped frequency distributions

• D.

All

• E.

A and b

• 24.
Which of the following statements is true about the standard deviation
• A.

The standard deviation is responsive to the exact postion of every score in the distribution

• B.

The standard deviation is the best choice among measures of variability when the distribution is severely skewed

• C.

Both a and b

• D.

Neither

• 25.
Which of the following is true about an ogive
• A.

It is used to graphically display the cumulative frequency distributive

• B.

It is used to graphically display the relative frequency distribution

• C.

It is a graph that always has a negative slope

• D.

All

• E.

A and b

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