WKST

Using the same numbers as in Question 8, the mode would be ______________.

42

The range IS an appropriate measure to use for distributions with outliers (T/F)?

F

The interquartile range refers to the range of the middle ______________% of the scores.

50

If the 10 scores in a sample were 26, 37, 28, 29, 37, 35, 24, 27, 28, and 31, the standard deviation would be ________________ .

4.64

The approximate 95% rule says that approximately 95% of the scores in a normal distribution lie within _________ standard deviation units of the mean.

2

Using the same numbers as in Question 8, the median would be ____________.

27.5

If the 20 scores on a quiz were: 12, 18, 42, 38, 48, 42, 35, 29, 40, 21, 17, 42, 32, 22, 20, 26, 13, 26, 22, and 36, The mean score would be _______________. (Make sure to round off to 2 decimal places)

29.05

Using the same numbers as in Question 8, the range would be _____________.

36

Using Question 28, according to the 99.7% rule, 99.7% of the scores lie between ______________ and __________________. Round off to 2 decimal places! 50.23 and 95.32

51.56 and 98.90

Suppose a normal distribution of scores has a mean of 75.23 and a standard deviation of 7.89. According to the approximate 95% rule, approximately 95% of the scores lie between _________________ and ________________. Round to 2 decimal places!

59.45 and 91.09

Using Question 27, according to the precise 95% rule, 95% of the scores lie between ___________ and _______________. Round off to 2 decimal places! 59.63 and 90.89

59.77 and 90.69

Suppose a normal distribution of scores has a mean of 26 and a standard deviation of 4. In this distribution, about _________% of the scores fall between 22 and 30.

68

If the 10 scores in a population were 16, 22, 46, 36, 19, 22, 34, 21, 39, and 35, the standard deviation would be ______________ .

9.64

In a bar graph, the columns (or bars) DO touch each other (T/F)?

F

The mode is the BEST measure to use for scores that are normally distributed and measured on an interval or ratio scale of measurement (T/F)?

F

On the horizontal axis of a frequency polygon, you begin with one score or score interval lower than the lowest obtained and end with one score or score interval higher than the highest obtained (T/F)?

T

The median is an appropriate measure to use for scores that are skewed and measured on the interval or ratio scale of measurement (T/F)?

T

The median is considered to be insensitive to extreme scores (T/F)?

T

The median is often called the middle score in a distribution (T/F)? True

T

The standard deviation was designed to describe the variability of the scores in a normal distribution (not skewed) (T/F)? True

T

Variability refers to how much the scores vary from one another (T/F)? True

T

Women's heights naturally fall into a normal, bell-shaped distribution (T/F).

T

Kevin asked participants what language they spoke at home. What kind of figure (graph) should Kevin create to display his data?

bar

What kind of figure (graph) shows the frequencies (or percentages) of a QUALITATIVE variable?

bar

The standard deviation is a measure of how much scores vary from the ____________ of the scores.

mean

Please list the measures of central tendency: _______________, _________________, & ________________.

mean, median, and mode

I administered a basic skills psychology quiz to psychology professors at 3 Ivy League schools. What kind of SKEW can we expect to find?

negative

Hermione collected data about the favorite colors of her co-workers. Can she create a histogram using her data?

no