Exam 4: Summarizing Scores With Measures of Variability

Suppose you scored 95 on a measure where the mean was 110 and the standard deviation was 15.Assuming a normal distribution, what percentage of scores should fall between your score and the mean?

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Question 41

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 would be the estimated population standard deviation $\left(s_{X}\right)$ ?

(Short Answer)

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Question 42

If we know the sample variance, can we use that information to find the sample standard deviation?

(Multiple Choice)

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Question 43

When we are considering measures of variability, we are effectively considering

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Question 44

A group of 10 students participated in a study of nutritional awareness.What is the sample variance $\left(S_{X}^{2}\right)$ of their scores? 20, 19, 22, 20, 15, 18, 15, 21, 19, 20

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Question 45

In general, the larger the value of the standard deviation,

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Question 46

A doctor wants to know how well elderly patients remember to take their medicine.The doctor measures the percentage of times during the week patients remembered to take their medicine.For a sample of 10 patients, the sample mean percentage was 75 and the sample variance was 15.If the doctor could test his/her entire patient population, what would he/she expect the population variance to be?

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Question 47

Suppose you have a set of normally distribution data where the mean is 120 and the standard deviation is 15.What score is located at -3 $S_{X}$ ?

(Multiple Choice)

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Question 48

What is the range of the following data? 15, 9, 17, 12, 15, 19, 18, 15, 16, 10, 13

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Question 49

Which of the following sets of data appears to show the greatest amount of variability?

(Multiple Choice)

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Question 50

For the following data set, find the estimated population variance and the estimated population standard deviation.Score f 20 2 19 5 18 8 17 5 16 4 15 1

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Question 51

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

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Question 52

Ms.Gonzalez has recorded the test scores for each of her 25 students.She has calculated $\Sigma X^{2}$ = 320 and $\left(\sum X\right)^{2}$ = 5,000.Calculate the estimated population standard deviation for her data.

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Question 53

A program evaluator for a large school district wants to know how much intelligence varies in the elementary schools.She selects one classroom at each grade level in each elementary school and administers an intelligence test to the children in those classrooms.In order to find out which school has the most consistent intelligence level, which of the following should she calculate for each school?

(Multiple Choice)

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Question 54

A psychology professor wanted to describe the adolescents in her state in terms of the personality characteristic of introversion/ extroversion.She selects a sample and measures their scores on a test of introversion/extroversion.The measure of variability she should calculate is

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Question 55

What is the range of the following data?

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Question 56

In a normal distribution, approximately what percentage of scores is not between -1 $S_{X}$ and 1 $S_{X}$ ?

(Multiple Choice)

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Question 57

What is the estimated population standard deviation $\left(s_{X}\right)$ of the following data? $What is the estimated population standard deviation \left(s_{X}\right) of the following data?$

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Question 58

Showing 41 - 58 of 58

Suppose you scored 95 on a measure where the mean was 110 and the standard deviation was 15.Assuming a normal distribution, what percentage of scores should fall between your score and the mean?

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 would be the estimated population standard deviation $\left(s_{X}\right)$ ?

If we know the sample variance, can we use that information to find the sample standard deviation?

When we are considering measures of variability, we are effectively considering

A group of 10 students participated in a study of nutritional awareness.What is the sample variance $\left(S_{X}^{2}\right)$ of their scores? 20, 19, 22, 20, 15, 18, 15, 21, 19, 20

In general, the larger the value of the standard deviation,

Suppose you have a set of normally distribution data where the mean is 120 and the standard deviation is 15.What score is located at -3 $S_{X}$ ?

What is the range of the following data? 15, 9, 17, 12, 15, 19, 18, 15, 16, 10, 13

Which of the following sets of data appears to show the greatest amount of variability?

For the following data set, find the estimated population variance and the estimated population standard deviation.Score f 20 2 19 5 18 8 17 5 16 4 15 1

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

Ms.Gonzalez has recorded the test scores for each of her 25 students.She has calculated $\Sigma X^{2}$ = 320 and $\left(\sum X\right)^{2}$ = 5,000.Calculate the estimated population standard deviation for her data.

A psychology professor wanted to describe the adolescents in her state in terms of the personality characteristic of introversion/ extroversion.She selects a sample and measures their scores on a test of introversion/extroversion.The measure of variability she should calculate is

What is the range of the following data?

In a normal distribution, approximately what percentage of scores is not between -1 $S_{X}$ and 1 $S_{X}$ ?

What is the estimated population standard deviation $\left(s_{X}\right)$ of the following data? $What is the estimated population standard deviation \left(s_{X}\right) of the following data?$

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

Suppose you scored 95 on a measure where the mean was 110 and the standard deviation was 15.Assuming a normal distribution, what percentage of scores should fall between your score and the mean?

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 would be the estimated population standard deviation (sX)\left(s_{X}\right)(sX​) ?

If we know the sample variance, can we use that information to find the sample standard deviation?

When we are considering measures of variability, we are effectively considering

A group of 10 students participated in a study of nutritional awareness.What is the sample variance (SX2)\left(S_{X}^{2}\right)(SX2​) of their scores? 20, 19, 22, 20, 15, 18, 15, 21, 19, 20

In general, the larger the value of the standard deviation,

Suppose you have a set of normally distribution data where the mean is 120 and the standard deviation is 15.What score is located at -3 SXS_{X}SX​ ?

What is the range of the following data? 15, 9, 17, 12, 15, 19, 18, 15, 16, 10, 13

Which of the following sets of data appears to show the greatest amount of variability?

For the following data set, find the estimated population variance and the estimated population standard deviation.Score f 20 2 19 5 18 8 17 5 16 4 15 1

Find 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

Ms.Gonzalez has recorded the test scores for each of her 25 students.She has calculated ΣX2\Sigma X^{2}ΣX2 = 320 and (∑X)2\left(\sum X\right)^{2}(∑X)2 = 5,000.Calculate the estimated population standard deviation for her data.

A psychology professor wanted to describe the adolescents in her state in terms of the personality characteristic of introversion/ extroversion.She selects a sample and measures their scores on a test of introversion/extroversion.The measure of variability she should calculate is

What is the range of the following data?

In a normal distribution, approximately what percentage of scores is not between -1 SXS_{X}SX​ and 1 SXS_{X}SX​ ?

What is the estimated population standard deviation (sX)\left(s_{X}\right)(sX​) of the following data?

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

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 would be the estimated population standard deviation $\left(s_{X}\right)$ ?

A group of 10 students participated in a study of nutritional awareness.What is the sample variance $\left(S_{X}^{2}\right)$ of their scores? 20, 19, 22, 20, 15, 18, 15, 21, 19, 20

Suppose you have a set of normally distribution data where the mean is 120 and the standard deviation is 15.What score is located at -3 $S_{X}$ ?

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

Ms.Gonzalez has recorded the test scores for each of her 25 students.She has calculated $\Sigma X^{2}$ = 320 and $\left(\sum X\right)^{2}$ = 5,000.Calculate the estimated population standard deviation for her data.

In a normal distribution, approximately what percentage of scores is not between -1 $S_{X}$ and 1 $S_{X}$ ?

What is the estimated population standard deviation $\left(s_{X}\right)$ of the following data? $What is the estimated population standard deviation \left(s_{X}\right) of the following data?$