### Weather Station, Mental Process And Behavior, Sympathetic Nervous System Quiz

The key terms in these Statistic chapters include Correlation, Weather Station, Sample, Mental Process And Behavior, Sympathetic Nervous System, Population, Pearson Correlation, Spearman Correlation, Regression Equation. Mental Process And Behavior Quiz – STATS

The database that contains brief summaries of psychology articles and information on where to find the original publication is ____.

**PsycINFO**

A RATIONAL explanation is based on ____.

**Logical deductions**

An empirical explanation is based on ____.

**Evidence of the senses**

The following X and Y scores from a research study produced SS X = 2 and SP = 8. What is the regression equation for predicting Y?

X Y

1 2

2 3

3 10

**Y = 4X – 3**

Which of the following best describes the Pearson correlation for these data?

X Y

2 5

5 1

3 4

4 2

**Negative**

What correlation is obtained when the Pearson correlation is computed for data that have been converted to ranks?

**The Spearman correlation**

A researcher conducts a hypothesis test to examine the hypothesis that stress is positively associated with greater impulsive decision-making. Which statement below is consistent with the null hypothesis for this hypothesis test?

**ρ ≤ 0**

What is indicated by a Pearson correlation of r = +1.00 between X and Y?

**Each time X increases, there is a perfectly predictable increase in Y**

A linear regression equation is computed for a sample of n = 13 pairs of X and Y scores. For the analysis of regression testing the significance of the equation, what are the df values for the F-ratio?

**df = 1, 11**

A set of n = 10 pairs of scores has Σ X = 20, Σ Y = 30, and Σ XY = 74. What is the value of SP for these data?

**SP = 14**

A sample of n = 4 scores, has Σ X = 4, and Σ X 2 = 32. What is the value of SS for this sample?

**28**

Which of the following is true for most distributions?

**Around 70% of the scores will be located within one standard deviation of the mean.**

The database that contains brief summaries of psychology articles and information on where to find the original publication is ____.

**PsycINFO**

A RATIONAL explanation is based on ____.

**Logical deductions**

An empirical explanation is based on ____.

**Evidence of the senses**

The following X and Y scores from a research study produced SS X = 2 and SP = 8. What is the regression equation for predicting Y?

X Y

1 2

2 3

3 10

**Y = 4X – 3**

Which of the following best describes the Pearson correlation for these data?

X Y

2 5

5 1

3 4

4 2

**Negative**

What correlation is obtained when the Pearson correlation is computed for data that have been converted to ranks?

**The Spearman correlation**

A sample of n = 20 scores has a mean of M = 32 and a standard deviation of s = 6. In this sample, what is the z-score corresponding to X = 28?

**z = -.67**

For a population with µ = 65 and σ = 4, what is the X value corresponding to z = -2.25?

**X = 56**

One item on a questionnaire asks students how many times per day in a typical week they make a call on their cell phones. The responses for a sample of n = 12 students are summarized in the frequency distribution. What is the best measure of central tendency for these data?

X f

5+ 5

4 4

3 1

2 0

1 2

0 0

**The median**

Which statement below is correct regarding a grouped frequency distribution table?

**The ∑x cannot be determined.**

Which term is used to describe the shape of a frequency distribution graph in which most scores pile up on the left-hand side of the graph and taper off to the right?

**Positively skewed**

What scale of measurement is being used when a researcher measures the amount of car accidents that participants have been involved in during their lifetime?

**Ratio**

This dude and his cousin go to an amusement park. The dude goes to get some corndogs or whatever, and his cousin goes to ride a big-ass roller coaster that has a height restriction. The ride attendant measures the cousin’s height and says he’s tall enough to ride. Dude gets back with the snacks and his cousin says how great the roller coaster was. The dude’s like, “awesome, I should be able to ride it too because I’m taller than my cousin.” How did the dude reach this conclusion?

**Rational Method**

What’s a potential problem with secondary sources?

**Typically do not contain detailed information about any specific study**

A refutable hypothesis must ____.

**Allow for the possibility that the observations will not support the hypothesis**

Which of the following statements is true?

**Primary sources contain descriptions of research by those who conducted it**

A population is normally distributed with a mean of µ = 145 and σ = 20. Which is the percentile rank for X = 136?

**32.64%**

A Spearman correlation coefficient should be computed to assess the correlation between variables when both variables are measured using a(n) _____ scale of measurement.

**Ordinal**

The results from a research study indicate that adolescents who watch more violent content on television also tend to engage in more violent behavior than their peers. The correlation between amount of television violence consumed and amount of violent behavior is an example of a _____ correlation.

**Positive**

Consider that a researcher is examining the relationship between amounts of physical activity and weight among adults. The researcher goes to a local athletics club to sample individuals who frequently exercise to examine the correlation between physical activity and weight. What is the most prominent concern regarding this research study that may obscure the true nature of the relationship between physical activity and weight among the population of adults?

**Restriction of range**

A population distribution has σ = 6. What position in this distribution is identified by a z-score of z = +2.33?

**14 points above the mean**

Last week Sarah had exams in her math and Spanish classes. On the math exam, the mean was µ = 40 with σ = 5, and Sarah had a score of X = 45. On the Spanish exam, the mean was µ = 60 with σ = 8, and Sarah had a score of X = 68. For which class should Sarah expect the better grade relative to her peers in each class?

**The grades should be the same because the two exam scores are in the same location.**

The database that contains brief summaries of psychology articles and information on where to find the original publication is ____.

**PsycINFO**

A RATIONAL explanation is based on ____.

**Logical deductions**

An empirical explanation is based on ____.

**Evidence of the senses**

The following X and Y scores from a research study produced SS X = 2 and SP = 8. What is the regression equation for predicting Y?

X Y

1 2

2 3

3 10

**Y = 4X – 3**

Which of the following best describes the Pearson correlation for these data?

X Y

2 5

5 1

3 4

4 2

**Negative**

What correlation is obtained when the Pearson correlation is computed for data that have been converted to ranks?

**The Spearman correlation**

This dude and his cousin go to an amusement park. The dude goes to get some corndogs or whatever, and his cousin goes to ride a big-ass roller coaster that has a height restriction. The ride attendant measures the cousin’s height and says he’s tall enough to ride. Dude gets back with the snacks and his cousin says how great the roller coaster was. The dude’s like, “awesome, I should be able to ride it too because I’m taller than my cousin.” How did the dude reach this conclusion?

**Rational Method**

What’s a potential problem with secondary sources?

**Typically do not contain detailed information about any specific study**

A refutable hypothesis must ____.

**Allow for the possibility that the observations will not support the hypothesis**

Which of the following statements is true?

**Primary sources contain descriptions of research by those who conducted it**

A population is normally distributed with a mean of µ = 145 and σ = 20. Which is the percentile rank for X = 136?

**32.64%**