Question 1

Meg is using a procedure to choose her sample so that each member of the population for her study has an equal chance of being included in her sample.Meg is using a procedure known as _______.

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The answer of Meg is using a procedure to choose...

Question 2

Explain the purpose of inferential statistics and how samples and populations are utilized to fulfill this purpose;and explain how a sample is chosen,and why it is chosen in this manner.

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The answer of Explain the purpose of inferential statistics and...

Question 3

Three hundred students at Meridian Community College are surveyed regarding their views on the new cafeteria menus.In this study,all 4,000 students at Meridian Community College would be considered the _______.

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The answer of Three hundred students at Meridian Community College...

Question 4

Define a z-score,and explain how it is calculated in the following example: Abby had a score of 75 on a test with a mean of 70 and a standard deviation of 5.What is her z-score?

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The answer of Define a z-score,and explain how it is...

Question 5

In your study to determine the best method to teach current events to freshmen college students at your college,what would constitute your population and sample,and how would your sample be chosen and why? After obtaining your results,if you find that the new method produced higher scores than the old method of instruction,how will you determine if this difference was a "real difference" or occurred by chance?

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The answer of In your study to determine the best...

Question 6

Describe a normal curve,and explain the relationship of the standard deviation to this curve.

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The answer of Describe a normal curve,and explain the relationship...

Question 7

Juanita has determined the relationship between her vocabulary screening test and her students' reading scores to be .60.The percent of variance in reading scores that is accounted for by knowing the students' scores on the screening test would be _______ percent.

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The answer of Juanita has determined the relationship between her...

Question 8

If a correlation is +1.00,then the relationship that exists would be referred to as a(n) _______ positive relationship.

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The answer of If a correlation is +1.00,then the relationship...

Question 9

You handle the payroll at a small company whose president boasts that the average salary at his company is
$54,000.What is the statistical reason for this distorted view of the company's average pay? Then,using the salaries listed below for everyone that works at this company determine the mean,median,mode,and range of salaries for this small company.
Salaries: $200,000 (president's salary);$100,000 (vice­president's salary)
Other eight employees earn $30,000 each.

Accepted Answer

The answer of You handle the payroll at a small...

Question 10

You have found a correlation coefficient of +.70 between the number of days students attend class and their grade point averages.Describe what this correlation means both in its strength and direction;determine the percent of variance and explain what it means;and explain why this correlation does not prove causation between class attendance and grade point average.

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The answer of You have found a correlation coefficient of...

Question 11

To decide which applicants have the best chance for academic success,most colleges have formulas that use _______ correlations.

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The answer of To decide which applicants have the best...

Question 12

Explain what is meant by a correlation between two variables,how one would know if a correlation coefficient were weak or strong,and what constitutes a perfect relationship;describe what is meant by positive,negative,and zero correlations and give an example of each.

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The answer of Explain what is meant by a correlation...

Question 13

In psychology,an experimental result would be considered significant if it had a probability of _______ or less.

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The answer of In psychology,an experimental result would be considered...

Question 14

Describe a frequency distribution,what it is used for,how it is constructed,and two ways that it can be shown graphically.

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The answer of Describe a frequency distribution,what it is used...

Question 15

An estimate of how often experimental results could have occurred by chance alone are provided by using tests of
__________.

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The answer of An estimate of how often experimental results...

Question 16

Describe the function of the measures of variability;name and define two of these measures.

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The answer of Describe the function of the measures of...

Question 17

A researcher studies the effect of a new therapy on a small group of hyperactive children in the hopes of generalizing these findings for use with all hyperactive children.This researcher is using _______ statistics.

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The answer of A researcher studies the effect of a...

Question 18

For his study,Guy has chosen the most commonly used correlation coefficient,which is the _______.

Accepted Answer

The answer of For his study,Guy has chosen the most...

Question 19

To conclude that a cause-and-effect relationship exists,we must use a(n) _______.

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The answer of To conclude that a cause-and-effect relationship exists,we...

Quiz 81: Understanding Descriptive and Inferential Statistics for Psychological Research