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1) Identify each of the following as examples of nominal, ordinal, interval, or ratio scales of measurement.

1. A poll of registered voters in Florida asking wich candidate they support

2. The lenght of time required for a wound to heal when using they support

3. The number of telephone calls at a switchboard for five minute period

4. The distance first-year college football players can kick a ball

5. Mental health diagnoses present in an elderly population

6. The rankings of employees on their job performance

2) Two undred raffle tickets are sold. Your friend has five people in her family who each bought two raffle tickets. What is the probability that someone from her family will win the raffle?

3) A psychologist measures units of change for a memory test after students are given an opportunity to sleep only four hours. The following change units were obtained: 7, -12, 4, -7, 3, -10. Find the a) mean, b) median, c) standard deviation, e) range, and f) variance.

4) Suppose you want to figure out what to do with your degree in psychology. You ask some fellow students from your psychology program who recently graduated to find out what they are doing with their degree and how much it pays. What type of sampling is this? What are the limitations of this sampling approach?

5) Variables in which the values are categories are known as:

Interval variables

Normal variables

Ordinal variables

Ratio variables

6) Before the researchcher can conduct a statistical test, the research question must be traslated into:

A testable hypothesis

Additional observations

Mathematical symbols

Numbers

7) The hypothesis stating that there are no differences, effects, or relationships is:

The alternative hipothesis

The baseline hypothesis

The null hypothesis

The reasonable hypothesis

8) A group of students made the following scores on a 10-item quiz in psychology statistica: (5, 6, 7, 7, 7, 8, 8, 9, 9, 10, 10) what is the mean score?

6.6

7.2

7.8

8.7

9) A group of students made the following scores on a 10-item quiz in psychological statistics: (5, 6, 7, 7, 7, 8, 8, 9, 9, 10, 10) what is the median score?

6

7

8

9

10) A group of students made the following scores on a 10-item quiz in psychological statistic: (5, 6, 7, 7, 7, 8, 8, 9, 9, 10, 10) What is the mode?

11) A group of sutedents made the following scores on a 10-item quiz in psychological statistics ( 5, 6, 7, 7, 7, 8, 8, 9, 9, 10, 10) What is the range of score?

12) A group of students made the following scores on a 10-item quiz in psychological statistics: (5, 6, 7, 7, 7, 8, 8, 9, 9, 10, 10) What is the variance, treating these scores as a sample?

1.53

1.60

2.33

2.56

13)The standard normal distribution has all the following properties EXCEPT:

The mean, mode, and median are all equal

The total area under the curve equal 1

The curve is specified by two parameters, the mean and the standard deviation

The curve extend to + and - 3 standard deviations from the mean

14) According to the Empirical Rule, approximately % of the data in a normal distribution will fall within #1 standard deviation of the mean:

34

68

95

99.7

15) In statistical computations, the number of values that are free to vary is known as:

Degree of freedom

freedom factor

Variability index

Variation quotient

16) Which of the following reflects a Type I error?

Rejecting the null hypothesis

Rejecting the null hypothesis when in reality the null hypothesis is false

Accepting the null hypothesis when in reality the null hypothesis is true

Accepting the null hypothesis when the null hypothesis is false

17) Which type of sampling is used when the experimenter asks 5 area doctors to refer pregnant women to this astudy and accepts all women who offer to be in this study?

Purposive sampmling

Convenience sampling

Stratified sampling

18) In our statistical equations, n refers to:

mean

Standard deviation

Normal distribution

number of subjects

19) Which of the followingis true regarding alpha?

It is also known as the level of significance

value is set by the researcher

Value is equal to the probability of a type I error

All of the above are true

20) Macy proposes that boys who play sports are viewed as more attractive than boys who do not play sports. What is her null hypothesis?

Boys who plays spors are not viewed as more attractive than boys who do not play sports

Playing sports will influence how attractively boys are viewed

Boys who play sports are more attractive than girls who play sports

There can be no null hypothesis

21) You calculate a t of 2.38 and note that the tablet value for .01 is 3.22 and for .05 is 2.19. You would conclude that the null hypothesis can be:

Accepted at the .05 level

Rejected at the .05 level

None of the above

22) A researcher is studying political conservatism among 11 engineering students and 11 humanities students. The number of degrees of freedom for t test is:

22

20

11

10

23) A test for dependent groups should be used instead of a test for independent samples:

If each participant is measured twice

Whenever there are equal numbers of subjects in each group

Whenever there are only two groups

All of the above

24) In a normal distribution, what percent of the population falls within one and two standard deviations of the mean?

34%

68%

95%

25) Which of the following is more affected by extreme scores?

Mode

Mean

None of the above

26) On a histogram, what does the vertical (y) axis refer to?

Individual scores

Frequences

Means

Deviation scores

27) Which statistic refers to the average amount by which the scores in the sample deviate from the mean?

Standard deviation

Median

Mode

28) Assume a normal distribution for N = 300. How many cases would one sxpect to find between + 1 and -1 standard deviations around the mean?

102

285

150

204

29) A z score of zero tells us that the score is at the of the distribution.

Mean

Very top

Very botton

None of the above since z cannot be zero

30) In a unit normal curve, what goes on the x axis?

Frequencies

Observed scores

z scores

Area

31) Which of the following is a measure of variability?

Mean

Interval

All of the above

32) The only measure of central tendency can be found for nominal data is the:

Mean

Median

Mode

Midrange

33) If the probability of event A is 0.05 and the probability of event B is 0.35 and the probability of A and B occurring together is 0.25, then the probability of A or B is:

0.8

1.0

0.1575

0.55

34) A researcher knows that the average distance commuting students live from campus was previously 8.2 miles. Because of the rising prices of the gasoline, the research wants to test the claim that commuting students now live closer to campus. What is the correct alternative hypothesis?

The new mean distance is 8.2 miles.

The new mean distance is less than or equal to 8.2 miles.

The new mean distance is less than 8.2 miles.

The new mean distance is greater than or equal to 8.2 miles.

1. A poll of registered voters in Florida asking wich candidate they support

2. The lenght of time required for a wound to heal when using they support

3. The number of telephone calls at a switchboard for five minute period

4. The distance first-year college football players can kick a ball

5. Mental health diagnoses present in an elderly population

6. The rankings of employees on their job performance

2) Two undred raffle tickets are sold. Your friend has five people in her family who each bought two raffle tickets. What is the probability that someone from her family will win the raffle?

3) A psychologist measures units of change for a memory test after students are given an opportunity to sleep only four hours. The following change units were obtained: 7, -12, 4, -7, 3, -10. Find the a) mean, b) median, c) standard deviation, e) range, and f) variance.

4) Suppose you want to figure out what to do with your degree in psychology. You ask some fellow students from your psychology program who recently graduated to find out what they are doing with their degree and how much it pays. What type of sampling is this? What are the limitations of this sampling approach?

5) Variables in which the values are categories are known as:

Interval variables

Normal variables

Ordinal variables

Ratio variables

6) Before the researchcher can conduct a statistical test, the research question must be traslated into:

A testable hypothesis

Additional observations

Mathematical symbols

Numbers

7) The hypothesis stating that there are no differences, effects, or relationships is:

The alternative hipothesis

The baseline hypothesis

The null hypothesis

The reasonable hypothesis

8) A group of students made the following scores on a 10-item quiz in psychology statistica: (5, 6, 7, 7, 7, 8, 8, 9, 9, 10, 10) what is the mean score?

6.6

7.2

7.8

8.7

9) A group of students made the following scores on a 10-item quiz in psychological statistics: (5, 6, 7, 7, 7, 8, 8, 9, 9, 10, 10) what is the median score?

6

7

8

9

10) A group of students made the following scores on a 10-item quiz in psychological statistic: (5, 6, 7, 7, 7, 8, 8, 9, 9, 10, 10) What is the mode?

11) A group of sutedents made the following scores on a 10-item quiz in psychological statistics ( 5, 6, 7, 7, 7, 8, 8, 9, 9, 10, 10) What is the range of score?

12) A group of students made the following scores on a 10-item quiz in psychological statistics: (5, 6, 7, 7, 7, 8, 8, 9, 9, 10, 10) What is the variance, treating these scores as a sample?

1.53

1.60

2.33

2.56

13)The standard normal distribution has all the following properties EXCEPT:

The mean, mode, and median are all equal

The total area under the curve equal 1

The curve is specified by two parameters, the mean and the standard deviation

The curve extend to + and - 3 standard deviations from the mean

14) According to the Empirical Rule, approximately % of the data in a normal distribution will fall within #1 standard deviation of the mean:

34

68

95

99.7

15) In statistical computations, the number of values that are free to vary is known as:

Degree of freedom

freedom factor

Variability index

Variation quotient

16) Which of the following reflects a Type I error?

Rejecting the null hypothesis

Rejecting the null hypothesis when in reality the null hypothesis is false

Accepting the null hypothesis when in reality the null hypothesis is true

Accepting the null hypothesis when the null hypothesis is false

17) Which type of sampling is used when the experimenter asks 5 area doctors to refer pregnant women to this astudy and accepts all women who offer to be in this study?

Purposive sampmling

Convenience sampling

Stratified sampling

18) In our statistical equations, n refers to:

mean

Standard deviation

Normal distribution

number of subjects

19) Which of the followingis true regarding alpha?

It is also known as the level of significance

value is set by the researcher

Value is equal to the probability of a type I error

All of the above are true

20) Macy proposes that boys who play sports are viewed as more attractive than boys who do not play sports. What is her null hypothesis?

Boys who plays spors are not viewed as more attractive than boys who do not play sports

Playing sports will influence how attractively boys are viewed

Boys who play sports are more attractive than girls who play sports

There can be no null hypothesis

21) You calculate a t of 2.38 and note that the tablet value for .01 is 3.22 and for .05 is 2.19. You would conclude that the null hypothesis can be:

Accepted at the .05 level

Rejected at the .05 level

None of the above

22) A researcher is studying political conservatism among 11 engineering students and 11 humanities students. The number of degrees of freedom for t test is:

22

20

11

10

23) A test for dependent groups should be used instead of a test for independent samples:

If each participant is measured twice

Whenever there are equal numbers of subjects in each group

Whenever there are only two groups

All of the above

24) In a normal distribution, what percent of the population falls within one and two standard deviations of the mean?

34%

68%

95%

25) Which of the following is more affected by extreme scores?

Mode

Mean

None of the above

26) On a histogram, what does the vertical (y) axis refer to?

Individual scores

Frequences

Means

Deviation scores

27) Which statistic refers to the average amount by which the scores in the sample deviate from the mean?

Standard deviation

Median

Mode

28) Assume a normal distribution for N = 300. How many cases would one sxpect to find between + 1 and -1 standard deviations around the mean?

102

285

150

204

29) A z score of zero tells us that the score is at the of the distribution.

Mean

Very top

Very botton

None of the above since z cannot be zero

30) In a unit normal curve, what goes on the x axis?

Frequencies

Observed scores

z scores

Area

31) Which of the following is a measure of variability?

Mean

Interval

All of the above

32) The only measure of central tendency can be found for nominal data is the:

Mean

Median

Mode

Midrange

33) If the probability of event A is 0.05 and the probability of event B is 0.35 and the probability of A and B occurring together is 0.25, then the probability of A or B is:

0.8

1.0

0.1575

0.55

34) A researcher knows that the average distance commuting students live from campus was previously 8.2 miles. Because of the rising prices of the gasoline, the research wants to test the claim that commuting students now live closer to campus. What is the correct alternative hypothesis?

The new mean distance is 8.2 miles.

The new mean distance is less than or equal to 8.2 miles.

The new mean distance is less than 8.2 miles.

The new mean distance is greater than or equal to 8.2 miles.

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