Question 1

What graphic display is used to show equal variances?

Accepted Answer

Residual Plot

Answer

Scatterplot

Answer

Normal Probability Plot

Answer

Dot Plot

Question 2

What goes on the x-axis of a residual plot?

Accepted Answer

Explanatory Variable Label

Answer

Residual

Answer

X

Question 3

Categorical or Quantitative: zip codes

Accepted Answer

Categorical

Answer

Quantitative

Question 4

How do you describe the variable being used in a Linear Regression Hypothesis Test? (Step 1)

Accepted Answer

β = True slope of (x data label) and (y data label)

Answer

ρ = True slope of (two variables' labels) have a correlation.

Answer

β = True slope of (two variables' labels) have a correlation.

Answer

ρ = True slope of (x data label) and (y data label)

Question 5

What variable is of interest in the Linear Regression Hypothesis Test?

Accepted Answer

β

Answer

α

Answer

ρ

Answer

δ

Question 6

How do you correctly interpret a confidence interval for the true slope?

Accepted Answer

We are 95% confident that the true slope for (x & y labels) is within __ and __.

Answer

In the long run, 95% of confidence intervals would be between _ & _ in repeated sampling.

Answer

We are 95% confident that (x and y labels) are between __&__.

Answer

95% of confidence intervals would fall between __&__ with repeated sampling.

Question 7

Best graphic for: TV shows frequently watched

Accepted Answer

Bar graph

Answer

Scatterplot

Answer

Histogram

Question 8

How do you correctly interpret the y-intercept of a regression equation: y = ax+b?

Accepted Answer

When the x label is equivalent to 0, the y label is equivalent to "b".

Answer

When the x label is equivalent to 0, the y label is equivalent to "a".

Answer

When the y label is equivalent to 0, the x label is equivalent to "b".

Question 9

How do you correctly interpret the coefficient of determination?

Accepted Answer

If the $r^2$ value is .9, 90% of the variance in y label is because of variance of x label.

Answer

You can have a negative or positive $r^2$ value.

Answer

If the$r^2$ is 0, there is a strong correlation between x and y labels.

Question 10

What graphic display is used to show normality of residuals?

Accepted Answer

Normal Probability Plot

Answer

Dot Plot

Answer

Scatterplot

Answer

Residual Plot

Question 11

Categorical or Quantitative: jean size

Accepted Answer

Quantitative

Answer

Categorical

Question 12

Best graphic for: Jean size vs TV hours watched

Accepted Answer

Scatterplot

Answer

Histogram

Answer

Bar graph

Question 13

How do you BEST correctly interpret the "equal variances" condition in the Linear Regression T Test?

Accepted Answer

Residual plot shows equal variance. The linear model is best.

Answer

The residual plot show normality and linearity

Answer

The scatterplot shows equal variance.

Answer

The residual plot shows equal variance.

Question 14

What variable is the coefficient of determination?

Accepted Answer

$r^2$

Answer

r

Answer

$r_2$

Answer

2r

Question 15

How do you correctly interpret the slope of a regression line?

Accepted Answer

For every 1 unit the x variable increases, the y variable increases (slope value).

Answer

When x equals y they both increase by the same amount.

Answer

For every 1 unit the y variable increases, the x variable increases (slope value).

Question 16

What causes rejection of the the Ho?

Accepted Answer

P ≤ α

Answer

P ≥ α

Question 17

What graphic display is used to show the distribution of univariate quantitative data?

Accepted Answer

Dot Plot

Answer

Normal Probability Plot

Answer

Residual Plot

Answer

Scatterplot

Question 18

What causes the conclusion of "fail to reject the the $H_o$"?

Accepted Answer

P ≥ α

Answer

P ≤ α

Question 19

Best graphic for: TV hours watched (rounded up to whole numbers)

Accepted Answer

Histogram

Answer

Bar graph

Answer

Scatterplot

Question 20

What causes the conclusion of "fail to reject the the $H_o$"?

Accepted Answer

P ≥ α

Answer

P ≤ α

Question 21

Where did Miss. Evans not go to high school?

Accepted Answer

Plano West Senior High School

Answer

Empire High School

Answer

Plano Senior High School

Answer

Jasper High School

Question 22

What causes rejection of the the $H_o$?

Accepted Answer

P ≤ α

Answer

P ≥ α

Question 23

What graphic display is used to show linearity?

Accepted Answer

Scatterplot

Answer

Dot Plot

Answer

Residual Plot

Answer

Normal Probability Plot

Question 24

How do you properly interpret P-value and α?

Accepted Answer

Since P-value = 0 < α = .05, we reject $H_o$.

Answer

Since P-value = 0 > α = .05, we reject $H_o$.

Answer

Since P-value = 0 < α = .05, we fail to reject $H_o$.

Question 25

How do you correctly interpret the correlation coefficient?

Accepted Answer

If r = .99, there is a strong, positive, linear relationship between x and y labels.

Answer

If r = -.9, there is a moderate, negative, linear relationship between x and y labels.

Answer

If r = .5, there is a strong, positive, linear relationship between x and y labels.

Question 26

How do you correctly interpret the confidence level?

Accepted Answer

The percent of confidence intervals that will include the true population parameter with repeated sampling. OR The method used to get the confidence interval will have the true population parameter __% of the time with repeated sampling.

Answer

In the long run, __% of the confidence levels will equal the __% of the true population parameter falling within the interval. OR  __% of the population distribution is contained in the confidence interval.

Question 27

How do you determine if the scatterplot shows linearity? (if you are ever unsure)

Accepted Answer

If hard to see if scatterplot is linear, you can look at r.

Answer

If the r = 0, there is a linear relationship.

Answer

If hard to see if scatterplot is linear, you can look at  $r^2$

Question 28

How do you interpret the linearity condition for the Linear Regression Hypothesis Test?

Accepted Answer

Scatterplot shows linearity.

Answer

Normal probability plot shows linearity.

Answer

Residual plot shows linearity.

Question 29

How do you interpret the normal condition for the Linear Regression Hypothesis Test?

Accepted Answer

Normal probability plot of residuals shows linearity.

Answer

Residual plot shows equal variance; linear is the best model.

Answer

Scatterplot shows linearity.

Question 30

What are all the conditions needed for the Linear Regression Hypothesis Test? (this is tricky)

Accepted Answer

Linear, Independent, Normal, Equal Variances, Random

Answer

Linear, Independent, Normel, Equal Variances, Random

Answer

Linear, Inependent, Normal, Equal Variances, Random

Answer

Liner, Independent, Normal, Equal Variances, Random

Related quizzes

Related quizzes