Question 1

Find and $S_{X}^{2}$ $S_{X}^{2}$
$S_{X}$ $S_{X}$ for the following data set.8, 7, 2, 4, 4, 8, 2, 4, 6, 5, 7, 3, 9, 4, 5, 4, 7

Accepted Answer

The answer of Find and $S_{X}^{2}$ $S_{X}^{2}$
$S_{X}$ $S_{X}$ for the...

Question 2

The term variability is most opposite to

Accepted Answer

A) central tendency. 
B) consistency. 
C) association. 
D) homoscedasticity. 
A) central tendency. 
B) consistency. 
C) association. 
D) homoscedasticity.

Question 3

June has obtained a sample of 150 people from their school records about their career aptitude.She has calculated $\Sigma X^{2}$ = 867 and $\left(\sum X\right)^{2}$ = 38,427.Calculate the sample standard deviation for these data.

Accepted Answer

The answer of June has obtained a sample of 150...

Question 4

The greater the variability, the more spread out the scores are around the

Accepted Answer

A) median. 
B) mean. 
C) range 
D) standard deviation. 
A) median. 
B) mean. 
C) range 
D) standard deviation.

Question 5

If you see the notation $(\Sigma X)^{2}$ , you should

Accepted Answer

A) sum all the Xs, then square the sum. 
B) square all the Xs, then sum the squares. 
C) sum the Xs, then divide by 2. 
D) divide all the Xs by 2. 
A) sum all the Xs, then square the sum. 
B) square all the Xs, then sum the squares. 
C) sum the Xs, then divide by 2. 
D) divide all the Xs by 2.

Question 6

Suppose you scored an 80 on a measure where the mean is 65 and the standard deviation is 5.How many standard deviations from the mean is your score?

Accepted Answer

Your score is +3 sta

Question 7

Find for the scores in the following frequency distribution. $S_{X}^{2}$

Accepted Answer

The answer of Find for the scores in the following...

Question 8

Mr.Johnson has collected data from 100 people assessing their attitudes toward a recent referendum.He has calculated $\Sigma X^{2}$ = 470 and $(\Sigma X)$ = 150.Calculate the estimated population standard deviation for his data.

Accepted Answer

The answer of Mr.Johnson has collected data from 100 people...

Question 9

If the sample standard deviation $\left(S_{X}\right)$ for a set of data with N = 6 is found to be 3.17, then what is the sample variance $S_{X}^{2}$ ?

Accepted Answer

The answer of If the sample standard deviation $\left(S_{X}\right)$ for...

Question 10

Which of the following is not viewed as a measure of variability?

Accepted Answer

A) The mean 
B) The range 
C) Variance 
D) Standard deviation 
A) The mean 
B) The range 
C) Variance 
D) Standard deviation

Question 11

Frankie has data from a sample of 45 people analyzing their knowledge about cholesterol.He has calculated = 600 and $\Sigma X^{2}$
 $(\Sigma X)$ = 90.Calculate the sample standard deviation for these data.

Accepted Answer

The answer of Frankie has data from a sample of...

Question 12

If you see the notation $\sum X^{2}$ , you should

Accepted Answer

A) sum all the Xs, then square the sum. 
B) sum the Xs, then divide by 2. 
C) square all the Xs, then sum the squares. 
D) divide all the Xs by 2. 
A) sum all the Xs, then square the sum. 
B) sum the Xs, then divide by 2. 
C) square all the Xs, then sum the squares. 
D) divide all the Xs by 2.

Question 13

To determine the range, we simply

Accepted Answer

A) subtract the highest score minus the lowest score. 
B) subtract the lowest score minus the highest score. 
C) need to know the lowest and highest scores. 
D) average the lowest and highest scores. 
A) subtract the highest score minus the lowest score. 
B) subtract the lowest score minus the highest score. 
C) need to know the lowest and highest scores. 
D) average the lowest and highest scores.

Question 14

A cognitive psychologist found the mean recall of information increased consistently as the extent to which the participants elaborated on the material none, minimal, extensive) changed.Also, the standard deviation for each condition was small.What does this suggest about the relationship between the amount of elaboration and recall?

Accepted Answer

A) A strong relationship exists. 
B) A weak relationship exists. 
C) No relationship exists. 
D) A moderate relationship exists. 
A) A strong relationship exists. 
B) A weak relationship exists. 
C) No relationship exists. 
D) A moderate relationship exists.

Question 15

Suppose you have the following scores: 4, 3, 5, 5, and 2.What is the squared sum of X?

Accepted Answer

Suppose you have the following scores: 4

Question 16

A group of 10 students participated in a study of nutritional awareness.What is the sample standard deviation $\left(S_{X}\right)$  
  of their scores?
20, 19, 22, 20, 15, 18, 15, 21, 19, 20

Accepted Answer

Question 17

As with measures of centrality, the selection of a measure of variability should be based on

Accepted Answer

A) the mean and the variance. 
B) measurement scale and the shape of the distribution. 
C) population variance and standard deviation. 
D) the range of the scores and their frequency. 
A) the mean and the variance. 
B) measurement scale and the shape of the distribution. 
C) population variance and standard deviation. 
D) the range of the scores and their frequency.

Question 18

Suppose the sample variance and N both equal 10.What is the sample standard deviation?

Accepted Answer

To find the sample standard de

Question 19

The variance can never be

Accepted Answer

A) greater than the standard deviation. 
B) zero. 
C) a negative number. 
D) greater than the mean. 
A) greater than the standard deviation. 
B) zero. 
C) a negative number. 
D) greater than the mean.

Question 20

If a sample has a small standard deviation, we can say the scores in the sample are

Accepted Answer

A) variable. 
B) small. 
C) extreme. 
D) consistent. 
A) variable. 
B) small. 
C) extreme. 
D) consistent.

Find and $S_{X}^{2}$ $S_{X}^{2}$ $S_{X}$ $S_{X}$ for the following data set.8, 7, 2, 4, 4, 8, 2, 4, 6, 5, 7, 3, 9, 4, 5, 4, 7

The term variability is most opposite to

June has obtained a sample of 150 people from their school records about their career aptitude.She has calculated $\Sigma X^{2}$ = 867 and $\left(\sum X\right)^{2}$ = 38,427.Calculate the sample standard deviation for these data.

The greater the variability, the more spread out the scores are around the

If you see the notation $(\Sigma X)^{2}$ , you should

Suppose you scored an 80 on a measure where the mean is 65 and the standard deviation is 5.How many standard deviations from the mean is your score?

Find for the scores in the following frequency distribution. $S_{X}^{2}$ $Find for the scores in the following frequency distribution. S_{X}^{2}$

Mr.Johnson has collected data from 100 people assessing their attitudes toward a recent referendum.He has calculated $\Sigma X^{2}$ = 470 and $(\Sigma X)$ = 150.Calculate the estimated population standard deviation for his data.

If the sample standard deviation $\left(S_{X}\right)$ for a set of data with N = 6 is found to be 3.17, then what is the sample variance $S_{X}^{2}$ ?

Which of the following is not viewed as a measure of variability?

Frankie has data from a sample of 45 people analyzing their knowledge about cholesterol.He has calculated = 600 and $\Sigma X^{2}$ $(\Sigma X)$ = 90.Calculate the sample standard deviation for these data.

If you see the notation $\sum X^{2}$ , you should

To determine the range, we simply

Suppose you have the following scores: 4, 3, 5, 5, and 2.What is the squared sum of X?

A group of 10 students participated in a study of nutritional awareness.What is the sample standard deviation $\left(S_{X}\right)$ of their scores? 20, 19, 22, 20, 15, 18, 15, 21, 19, 20

As with measures of centrality, the selection of a measure of variability should be based on

Suppose the sample variance and N both equal 10.What is the sample standard deviation?

The variance can never be

If a sample has a small standard deviation, we can say the scores in the sample are

Introduction to Statistics and Research

Creating and Using Frequency Distributions

Summarizing Scores With Measures of Central Tendency

Describing Data With Z-Scores and the Normal Curve

Using Probability to Make Decisions About Data

Overview of Statistical Hypothesis Testing: the Z-Test

Hypothesis Testing Using the One-Sample T-Test

Hypothesis Testing Using the Two-Sample T-Test

Describing Relationships Using Correlation and Regression

Hypothesis Testing Using the One-Way Analysis of Variance

Understanding the Two-Way Analysis of Variance

Chi Square and Nonparametric Procedures

Filters

Exam 4: Summarizing Scores With Measures of Variability

Find and SX2S_{X}^{2}SX2​ SX2S_{X}^{2}SX2​ SXS_{X}SX​ SXS_{X}SX​ for the following data set.8, 7, 2, 4, 4, 8, 2, 4, 6, 5, 7, 3, 9, 4, 5, 4, 7

The term variability is most opposite to

June has obtained a sample of 150 people from their school records about their career aptitude.She has calculated ΣX2\Sigma X^{2}ΣX2 = 867 and (∑X)2\left(\sum X\right)^{2}(∑X)2 = 38,427.Calculate the sample standard deviation for these data.

The greater the variability, the more spread out the scores are around the

If you see the notation (ΣX)2(\Sigma X)^{2}(ΣX)2 , you should

Suppose you scored an 80 on a measure where the mean is 65 and the standard deviation is 5.How many standard deviations from the mean is your score?

Find for the scores in the following frequency distribution. SX2S_{X}^{2}SX2​

Mr.Johnson has collected data from 100 people assessing their attitudes toward a recent referendum.He has calculated ΣX2\Sigma X^{2}ΣX2 = 470 and (ΣX)(\Sigma X)(ΣX) = 150.Calculate the estimated population standard deviation for his data.

If the sample standard deviation (SX)\left(S_{X}\right)(SX​) for a set of data with N = 6 is found to be 3.17, then what is the sample variance SX2S_{X}^{2}SX2​ ?

Which of the following is not viewed as a measure of variability?

Frankie has data from a sample of 45 people analyzing their knowledge about cholesterol.He has calculated = 600 and ΣX2\Sigma X^{2}ΣX2 (ΣX)(\Sigma X)(ΣX) = 90.Calculate the sample standard deviation for these data.

If you see the notation ∑X2\sum X^{2}∑X2 , you should

To determine the range, we simply

Suppose you have the following scores: 4, 3, 5, 5, and 2.What is the squared sum of X?

A group of 10 students participated in a study of nutritional awareness.What is the sample standard deviation (SX)\left(S_{X}\right)(SX​) of their scores? 20, 19, 22, 20, 15, 18, 15, 21, 19, 20

As with measures of centrality, the selection of a measure of variability should be based on

Suppose the sample variance and N both equal 10.What is the sample standard deviation?

The variance can never be

If a sample has a small standard deviation, we can say the scores in the sample are

Introduction to Statistics and Research

Creating and Using Frequency Distributions

Summarizing Scores With Measures of Central Tendency

Describing Data With Z-Scores and the Normal Curve

Using Probability to Make Decisions About Data

Overview of Statistical Hypothesis Testing: the Z-Test

Hypothesis Testing Using the One-Sample T-Test

Hypothesis Testing Using the Two-Sample T-Test

Describing Relationships Using Correlation and Regression

Hypothesis Testing Using the One-Way Analysis of Variance

Understanding the Two-Way Analysis of Variance

Chi Square and Nonparametric Procedures

Filters

Find and $S_{X}^{2}$ $S_{X}^{2}$ $S_{X}$ $S_{X}$ for the following data set.8, 7, 2, 4, 4, 8, 2, 4, 6, 5, 7, 3, 9, 4, 5, 4, 7

June has obtained a sample of 150 people from their school records about their career aptitude.She has calculated $\Sigma X^{2}$ = 867 and $\left(\sum X\right)^{2}$ = 38,427.Calculate the sample standard deviation for these data.

If you see the notation $(\Sigma X)^{2}$ , you should

Find for the scores in the following frequency distribution. $S_{X}^{2}$ $Find for the scores in the following frequency distribution. S_{X}^{2}$

Mr.Johnson has collected data from 100 people assessing their attitudes toward a recent referendum.He has calculated $\Sigma X^{2}$ = 470 and $(\Sigma X)$ = 150.Calculate the estimated population standard deviation for his data.

If the sample standard deviation $\left(S_{X}\right)$ for a set of data with N = 6 is found to be 3.17, then what is the sample variance $S_{X}^{2}$ ?

Frankie has data from a sample of 45 people analyzing their knowledge about cholesterol.He has calculated = 600 and $\Sigma X^{2}$ $(\Sigma X)$ = 90.Calculate the sample standard deviation for these data.

If you see the notation $\sum X^{2}$ , you should

A group of 10 students participated in a study of nutritional awareness.What is the sample standard deviation $\left(S_{X}\right)$ of their scores? 20, 19, 22, 20, 15, 18, 15, 21, 19, 20