Statstest01&02

outlier

An _____ refers to any extreme scores in a data set.

mode/median

The _____ should be used when working with categorical or nominal data.

population parameter

The letter N would be used to represent (a):

mean, sample statisitc

The letter X with a bar over it is used to represent (a):

the name of category

The mode will always consist of the following:

mean

This consists of the middle point of a set of values:

a data point

This is another word for a single observation:

weighted mean

This is calculated by multiplying values by the frequency of their occurrence, adding the total of all the products, and then dividing by the total number of occurrences:

average

This is the value that best represents an entire group of scores.

mode

This measure of central tendency can be considered the least precise:

mean

This measure of central tendency can be considered the most precise:

decreasing your mean

Your current exam mean is 93.2. If you receive a 87 on the next exam, this will have the effect of:

having no effect on your mean

Your current exam mean is 95. If you receive a 95 on the next exam, this will have the effect of:

increasing your mean

Your current exam mean is 97.2. If you receive a 99 on the next exam, this will have the effect of:

bimodal

_____ refers to a distribution of scores that has two different modes, or two scores that occur most frequently.

mean

When the distribution of scores is free of outliers (i.e. extreme scores), the _____ tends to be the most precise measure of central tendency.

mean

When there are extreme scores in a distribution, calculating the _____ as the measure of central tendency would result in skewed results.

Median

When there are extreme scores in a distribution, the _____ provides a more accurate measure of the average

Average the two middle scores

When there is an even number of scores, how is the Median calculated?

median

Which measure of central tendency is also known as the midpoint for a set of scores?

mean

Which measure of central tendency is most influenced by outliers?

Percentile points

Which of the following are used to define the percentage of case equal to and below a certain point in a distribution of scores?

midpoint in a set of scores

Which of the following defines the Median?

variance, standard deviation

Which of the following is not a measure of central tendency?

23 professors and 23 researchers

Which of the following represents a bimodal distribution?

23, 37, 42, 51, 147

Which of the following sets of data illustrates skew?

n

Which of the following symbols represents sample size?

X

Which of the following symbols represents the individual score?

Francis Galton

Who is credited with the development of the correlation?

Q1

With regard to percentile points, what is the 25th percentile also known as?

Q2

With regard to percentile points, what is the median also known as?

about average

A test score in the 47th percentile would be considered:

very high

A test score in the 97th percentile would be considered:

Very low

A test score in the third percentile would be considered:

Arithmetic mean

For which of the following is the sum of the deviations from the mean always equal to zero?

skew

If a distribution is "significantly distorted" what is this called?

1,105

If you know M = 4 and the sum of scores is 4,420, what is n?

4

If you know M = 5 and the sum of scores is 20, what is n?

median

If you were to calculate the average of individual income and you found many extreme scores, which measure of central tendency should be used?

mean

If you were to calculate the average of individual income and you found no outliers, which measure of central tendency should you use?

mode

When describing a set of nominal data, a researcher should use which of the following measures of central tendency?

population parameter

What are Greek letters used to represent?

sample statistics

What are Roman letters used to represent?

population size

What does the large N represent?

sample size

What does the small n represent?

mean/median

What does the symbol M represent?

Significantly distort

What does the term "skew" mean?

the sum of values

What does the Ʃ symbol represent?

minimal impact

What impact do extreme scores have on the median?

Arithmetic average

What is another term for the mean?

average

What is another way of describing "measures of central tendency"?

Q3

What is the 75th percentile also known as?

39.29

What is the Mean value for the following scores: 10, 35, 40, 60, 55, 25, 50?

1.82

What is the Mean value of the following scores: 1.11, 1.17, 1.15, 2.02, 2.07, 3.11, 2.14?

149.5

What is the Mean value of the following scores: 117, 132, 147, 156, 196?

19.83

What is the Mean value of the following scores: 12, 25, 15, 27, 32, 8?

$11.50

What is the Median for the following amounts: $10.50, $10.75, $10.75, $11.50, $11.75, $12.75, $13.00?

$45,440

What is the Median for the following amounts: $13,400, $17,560, $45,440, $68,550, $96,400?

2.95

What is the Median of the following set of scores: 1.3, 2.3, 2.9, 3.0, 3.3, 4.7?

27.5

What is the Median of the following set of scores: 23, 17, 15, 32, 38, 47?

sum of the scores divided by the number of scores

What is the formula for computing the mean?

ƩX / n

What is the formula for computing the mean?

independents

What is the mode of the following data: 47 Republicans, 49 Democrats, and 52 Independents?

bowls of spaghetti

What is the mode of the following data: 52 bowls of spaghetti, 37 bowls of cereal, 14 sandwiches, and 17 personal pizzas?

males

What is the mode of the following data: 57 males and 43 females?

mean

What is the most common average computed?

sigma

What is the name of the letter Ʃ?

X with a bar over it

What is the symbol used to represent the mean?

an average

What should be used to determine central tendency?

med or man

What symbols are used to represent the median?

mean

What value is most often used to represent an entire group of scores?

mean

What would be your preferred measure of central tendency if you had the following data: $31,550, $33,750, $34,700, $37,550, $39,275?

median

What would be your preferred measure of central tendency if you had the following data: $32,400, $42,500, $47,250, $49,570, $145,850?

mode

What would be your preferred measure of central tendency if you had the following data: 23 Americans, 57 Mexicans, and 14 Canadians?

mode

What would be your preferred measure of central tendency if you had the following data: 57 males and 23 females?