Psych Stats Questions Exam One

Consider a normal distribution of scores (a distribution with a normal curve). In this distribution: μ= 50 σ = 10 For this distribution, ___% of the scores in this distribution fall between the raw scores of 40 and 52.

42.06%

Consider a normal distribution of scores (a distribution with a normal curve). In this distribution: μ= 50 σ = 10 For this distribution, ___% of the scores in this distribution fall below the raw score of 52.

57.93%

Consider a normal distribution of scores (a distribution with a normal curve). In this distribution: μ= 80 σ = 12 For this distribution, ___% of the scores in this distribution fall below the raw score of 62.

6.68%

Consider a normal distribution of scores (a distribution with a normal curve). In this distribution: μ= 50 σ = 10 For this distribution, 87.90% of the scores in this distribution fall below the raw score of ____.

61.7

Consider a normal distribution of scores (a distribution with a normal curve). In this distribution: μ= 80 σ = 12 For this distribution, ___% of the scores in this distribution fall below the raw score of 86.

69.15%

Consider a normal distribution of scores (a distribution with a normal curve). In this distribution: μ= 80 σ = 12 For this distribution, ___% of the scores in this distribution fall above the raw score of 68.

84.13%

Consider a normal distribution of scores (a distribution with a normal curve). In this distribution: μ= 80 σ = 12 For this distribution, ___% of the scores in this distribution fall below the raw score of 92.

84.13%

I want to know if consuming fish oil really makes you smarter. How smart you are is:

Dependent variable

Blondes have more fun. Blonde is:

Discrete variable * Nominal= discrete

120 students came to my party. I sampled 5 of them to ask how many cookies they ate. Here are my results: Cookies 1 3 3 2 1 What is the median for this data?

Median= 2

I asked my students how many headaches they had experienced in the last week. Below is the data: Participant Headaches 1 1 2 2 3 5 4 3 5 0 6 0 7 3 8 2 9 0 10 0 11 2 12 1 What is the N for this data?

N=12

I hypothesize that being from Nebraska causes you to be happy. Being from Nebraska is:

Nominal

I hypothesize that eating cheese causes you to become obese. Eating cheese is:

Nominal

Bar charts are used for:

Nominal data

If I measure fun on a scale of 1-10 I will get ____ data

Ordinal data * ordinal data=continuous

I want to know how many web-enabled devices students have with them. I sampled 5 students. Here is their data: Number of devices 4 3 5 5 2 What is the SS for this data?

SS= 0.0

120 students came to my party. I sampled 5 of them to ask how many cookies they ate. Here are my results: Cookies 1 3 3 2 1 What is the sum of squares for this data?

SS= 4

120 students came to my party. I sampled 5 of them to ask how many cookies they ate. Here are my results: Cookies 1 3 3 2 1 What is the variance for this data? Remember, this is a sample.

Variance= 1

I want to know how many web-enabled devices students have with them. I sampled 5 students. Here is their data: Number of devices 4 3 5 5 2 What is the variance for this data?

Variance= 1.7

I asked my students how many headaches they had experienced in the last week. Below is the data: Participant Headaches 1 1 2 2 3 5 4 3 5 0 6 0 7 3 8 2 9 0 10 0 11 2 12 1 What is X6 ?

X6= 0

I asked my class what they had for breakfast. 10 students had cereal, 5 students had eggs, and 3 students had no breakfast. How many variables are represented here? a. 1 b. 2 c. 3 d. 10

a. 1

In a normal curve, what percentage of scores are between μ-1σ and μ+1σ? a. 68.26% b. 84.13% c. 34.13% d. 47.72%

a. 68.26%

I asked my class what they had for breakfast. 10 students had cereal, 5 students had eggs, and 3 students had no breakfast. If I were to graph this data, what would I create? a. Bar Graph b. Scatterplot c. Histogram d. None of these

a. Bar Graph

I asked my class what they had for breakfast. 10 students had cereal, 5 students had eggs, and 3 students had no breakfast. What kind of data do I have? a. Categorical b. Continuous

a. Categorical

I wanted to know how much time my students spend watching Netflix. Here is the data: Participant Hours of Netflix 1 2 2 3.5 3 1.5 4 4 5 6.4 6 3 7 4.5 If I graph this I will create a: a. Histogram b. Bar chart c. none of these d. Scatter plot

a. Histogram

I asked my class what they had for breakfast. 10 students had cereal, 5 students had eggs, and 3 students had no breakfast. What kind of data do I have? a. Nominal b. Ordinal c. Interval d. Ratio

a. Nominal

I assign people from the USA the number 2. People from Mexico are assigned the number 3. People from Canada are assigned the number 1. This data is: a. Nominal b. Interval c. Ratio d. Ordinal

a. Nominal

I measure everyone's height. The data I get is: a. Ratio b. Ordinal c. Nominal d. Interval

a. Ration

For one section of this class, I calculate the average grade on an exam. I want to use this data to determine what the grade distribution will be for all of the sections of the class. The grade distribution for all of the sections of the class is calculated using a(n): a. Inferential statistic b. True experiment c. Descriptive Statistic d. Parameter

a. inferential statistic

What is ∑ (x-μ)? a. We cannot tell based on the provided information b. 0 c. σ d. SSpop

b. 0

I wanted to know how much time my students spend watching Netflix. Here is the data: Participant Hours of Netflix 1 2 2 3.5 3 1.5 4 4 5 6.4 6 3 7 4.5 What kind of data do I have? a. Categorical b. Continuous

b. Continuous

I wanted to know how much time my students spend watching Netflix. Here is the data: Participant Hours of Netflix 1 2 2 3.5 3 1.5 4 4 5 6.4 6 3 7 4.5 6.4 would be an appropriate bin on the X axis if I graphed this data. a. True b. False

b. False

I asked my class what they had for breakfast. 10 students had cereal, 5 students had eggs, and 3 students had no breakfast. If I graph this data, what would be my Y axis? a. Abscissa b. Frequency c. Breakfast d. Ratio

b. Frequency

I wanted to know how much time my students spend watching Netflix. Here is the data: Participant Hours of Netflix 1 2 2 3.5 3 1.5 4 4 5 6.4 6 3 7 4.5 What will be the Y axis of my graph? a. Netflix b. Frequency c. Hours d. Participant

b. Frequency

Rating how much you love doing homework on a scale from 1-10 gives you ____ data. a. Ratio b. Ordinal c. Nominal d. Interval

b. Ordinal

For one section of this class, I calculate the average grade on an exam. The average grade is a(n): a. independent variable b. descriptive statistic c. inferential statistic d. dependent variable

b. descriptive statistic

120 students came to my party. I sampled 5 of them to ask how many cookies they ate. Here are my results: Cookies 1 3 3 2 1 What symbol represents the mean for this data? a. σ b. x̅ c. SS d. μ

b. x̅

I asked my class what they had for breakfast. 10 students had cereal, 5 students had eggs, and 3 students had no breakfast. What is the frequency of cereal? a. There is no frequency represented here b. 5 c. 10 d. 3

c. 10

I look at the thermometer. I see that it is 10o Celsius. This data is: a. Ordinal b. Nominal c. Interval d. Ratio

c. Interval

If I have a hypothesis that wearing glasses causes you to become smarter, then wearing glasses is the: a. descriptive statistic b. inferential statistic c. independent variable d. dependent variable

c. independent variable

How many variables are represented on a scatterplot? a. 1 b. 3 c. None d. 2

d. 2

If I measure what is your major, I will get _____ data. a. Ratio b. Interval c. Ordinal d. Nominal

d. Nominal

If I have a hypothesis that wearing glasses causes you to become smarter, then I must test this hypothesis with: a. correlational study or experiment b. an observational study c. correlational study d. a true experiment

d. True experiment

For one section of this class, I calculate the average grade on an exam. I want to use this data to determine what the grade distribution will be for all of the sections of the class. The section that I measured is the: a. Statistic b. population c. parameter d. sample

d. sample

I want to know how many web-enabled devices students have with them. I sampled 5 students. Here is their data: Number of devices 4 3 5 5 2 What is the mode for this data?

mode= 5

I want to know how many web-enabled devices students have with them. I sampled 5 students. Here is their data: Number of devices 4 3 5 5 2 What is the s for this data?

s= 1.3

120 students came to my party. I sampled 5 of them to ask how many cookies they ate. Here are my results: Cookies 1 3 3 2 1 What is the standard deviation for this data? Remember, this is a sample.

sd= 1

120 students came to my party. I sampled 5 of them to ask how many cookies they ate. Here are my results: Cookies 1 3 3 2 1 Calculate the mean for this data.

x̅ = 2

Participant Score X1 4 X2 3 X3 5 X4 5 X5 2 The data above is from a sample. For the data above, what is the z score for X5?

z= -1.38

Participant Score X1 4 X2 3 X3 5 X4 5 X5 2 The data above is from a sample. For the data above, what is the z score for X1?

z= 0.15

I asked my students how many headaches they had experienced in the last week. Below is the data: Participant Headaches 1 1 2 2 3 5 4 3 5 0 6 0 7 3 8 2 9 0 10 0 11 2 12 1 Calculate Σ X

Σ X= 19

I asked my students how many headaches they had experienced in the last week. Below is the data: Participant Headaches 1 1 2 2 3 5 4 3 5 0 6 0 7 3 8 2 9 0 10 0 11 2 12 1 What is Σ X^2?

Σ X^2= 57

I asked my students how many headaches they had experienced in the last week. Below is the data: Participant Headaches 1 1 2 2 3 5 4 3 5 0 6 0 7 3 8 2 9 0 10 0 11 2 12 1 Calculate (Σ X)^2

(Σ X)^2= 361

I want to know how many web-enabled devices students have with them. I sampled 5 students. Here is their data: Number of devices 4 3 5 5 2 What is the (∑ X)^2 for this data?

(∑ X)^2= 0.0