Describing Research Methods MCQ

The ______ is the most appropriate measure of central tendency for a nominal variable.

Answer

Correct Answer: Mode

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The distribution that is most likely to be normal is a ______ one.

Answer

Correct Answer: Mesokurtic

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Which of the following is most appropriate for graphing nominal data?

Answer

Correct Answer: Bar graph

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If you reported that participants in your study were aged between 18 and 64, you would be reporting the ______.

Answer

Correct Answer: Observed minimum and maximum

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If you wanted to know what proportion of your sample consisted of left-handed people, you would be wondering about the ______.

Answer

Correct Answer: Percentage

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The point in a distribution at which 50% of the scores are below and 50% of the scores are above is known as the ______.

Answer

Correct Answer: Median

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If you wanted to summarize the weight of your participants, and you found that weight was normally distributed in your sample, at minimum you should ______.

Answer

Correct Answer: Report the mean and standard deviation for weight

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Which of the following is not a characteristic of a normal distribution?

Answer

Correct Answer: It is shaped like an upside-down bell or U shape.

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When an interval or ratio variable is skewed, what is the appropriate measure of central tendency to report?

Answer

Correct Answer: Median

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When scores cluster at one end of the distribution, it is said to be ______.

Answer

Correct Answer: Skewed

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A standardized score based on the ________ of the distribution.

Answer

Correct Answer: Standard deviation

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The average of the squared difference between the ______ and scores in a distribution, or the stan-dard deviation squared is called variance

Answer

Correct Answer: Mean

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The degree to which scores differ from each other in the sample is called variability

Answer

Correct Answer: True

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A non-normal distribution in which all scores or ratings have the same frequency is called

Answer

Correct Answer: Uniform distribution

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A single number that summarizes the degree to which scores differ from the ______ is called standard deviation

Answer

Correct Answer: Mean

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A number that indicates the degree of skewness in a distribution is called

Answer

Correct Answer: Skewness statistic

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A non-normal distribution that is asymmetrical, with scores clustering on one side of the distribution and a long tail on the other side is known as

Answer

Correct Answer: Skewed distribution

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The _______ between the observed maximum and minimum scores.

Answer

Correct Answer: Distance

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Possible minimum and maximum scores is the lowest and highest scores possible for the measurement instrument.

Answer

Correct Answer: True

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One or a few ________ skew the dis-tribution in the positive direction, but most of the scores cluster on the negative end of the scale.

Answer

Correct Answer: Positive scores

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A normal distribution that is rela-tively spread out and flat.

Answer

Correct Answer: Platykurtic curve

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The percentage of the distribution that scored below a specific score is known as

Answer

Correct Answer: Percentile

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The proportion of a score within the sample is known as

Answer

Correct Answer: Percentage

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Responses or observations that deviate greatly from the rest of the ____ is called outliers

Answer

Correct Answer: Data

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The lowest and highest scores on a measure that are obtained in the sample is called observed minimum and maximum scores

Answer

Correct Answer: True

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The process of categorizing and numbering information for quantitative analyses is called numerical coding

Answer

Correct Answer: True

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Symmetrical distribution in which scores cluster around the middle and then taper off at the ends is called normal distribution

Answer

Correct Answer: True

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Negative skew is one or a few _________ skew the distribution in the negative direction, but most of the scores cluster on the positive end of the scale

Answer

Correct Answer: Negative scores

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The most frequent score in a distribution is called mode

Answer

Correct Answer: Mode

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A normal distribution with a moder-ate or middle peak

Answer

Correct Answer: Mesokurtic curve

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The score that cuts a distribution in half

Answer

Correct Answer: Median

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The arithmetic average is known as

Answer

Correct Answer: Mean

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Leptokurtic curve is a normal distribution with most of the scores in the middle and a sharp peak

Answer

Correct Answer: True

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The degree of the peak of a normal distribution is called kurtosis

Answer

Correct Answer: True

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_______ is used to graph used to display interval or ratio data in which the frequency of scores is depicted on the y-axis and the interval ratings or ratio scores are depicted on the x-axis. Adjacent bars represent the frequency of each rat-ing or score.

Answer

Correct Answer: Histogram

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Frequency polygon is graph used to display interval or ratio data in which the frequency of scores is depicted on the y-axis and the scores are depicted on the x-axis. Points represent the frequency of each score. The points are con-nected with ______ that begin and end on the x-axis.

Answer

Correct Answer: Straight lines

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A count of how many times a score appears in the sample is called

Answer

Correct Answer: Frequency

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A type of _______ analysis used to summarize the characteristics of a sample.

Answer

Correct Answer: Qualitative

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The proportion of a score that falls within a specified interval is known as

Answer

Correct Answer: Cumulative percentage

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The process of categorizing information is known as

Answer

Correct Answer: Coding

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A ______ score that summarizes the center of the distribution is called central tendency

Answer

Correct Answer: Single

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A non-normal distribution that has _____ peaks is called bimodal distribution

Answer

Correct Answer: Two

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Graph used to display nominal or ordinal data in which the frequency of scores is depicted on the y-axis and the categories for nominal data or ranks for ordinal data are depicted on the x-axis. Nonadjacent bars repre-sent the frequency of each category or rank is called.

Answer

Correct Answer: Bar Graph

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