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WorksheetsAP Statistics Review
Total questions: 15
Worksheet time: 15mins
Of the following dotplots, which represents the set of data that has the greatest standard deviation?
Gina's doctor told her that the standardized score (z- score) for her systolic blood pressure, as compared to the blood pressure of other women her age, is 1.50. Which of the following is the best interpretation of this standardized score?
Gina's systolic blood pressure is 150.
Gina's systolic blood pressure is 1.50 standard deviations above the average systolic blood pressure of women her age.
Gina's systolic blood pressure is 1.50 above the average systolic blood pressure of women her age.
Gina's systolic blood pressure is 1.50 times the average systolic blood pressure for women her age.
Only 1.5% of women Gina's age have a higher systolic blood pressure than she does.
Which of the graphs would have a correlation coefficient of r = 0.69 ?
Which of the following is the regression equation for this data?
Price^ = 87.3180 - 19.4(Area)
Price^ = -19.4 + 0.1297(Area)
Area^ = -19.4 + 0.1297(Price)
Price^ = 0.1297 - 19.4(Area)
Estimate the correlation coefficient.
r = -0.8
r = -0.5
r = 0.5
r = 0.8
The ___________________ measures the percent of the variability in the response variable that is accounted for by the least-squares regression line.
correlation r
x2
coefficient of relaxation
You are analyzing a scatter plot that has a negative correlation. What is true of the of the x and y values?
As x increases, y decreases
As x increases, y increases
As x decreases, y decreases
In order to estimate the proportion of students that text while driving, a school administrator selects a simple random sample of students from a list of all students at the school who have parking permits. The students are called to the office, one at a time. The administrator asks each student, “Do you text while driving, even though you are not supposed to?” Based on the survey, the administrator estimates that only 2% of students with parking passes text while driving. What potential bias is present in the design of this survey and what is the likely direction of the bias?
The sample proportion is likely an underestimate of the population proportion due to response bias.
The sample proportion is likely an underestimate of the population proportion due to undercoverage.
The sample proportion is likely an underestimate of the population proportion due to nonresponse.
The sample proportion is likely an overestimate of the population proportion due to response bias.
The sample proportion is likely an overestimate of the population proportion due to undercoverage.
Given the following VENN Diagram answer the following.
P( A | B )
2
2/3
3/2
.8
Students recorded the amount of minutes they spend watching TV. Using the box plot shown above, what is the median?
72
120
60
78
Which is TRUE?
I. Random scatter in the residual plot indicates a linear model.
II. If two variables are very strongly associated, then the correlation between them will be near 1 or -1.
III. Changing the units of measurement for x or y changes the correlation coefficient.
I only
II only
I and II only
I, II and III
Which is the best CONTEXTUAL description of the y - intercept for the linear regression equation of the rats: Weight = 100 + 40(Time)?
The y-intercept is 100, which means the rat is predicted to weigh 100 grams at birth.
The y-intercept is 100, which is where the graph crosses the y-axis.
100 is where the data starts on the y-axis.
The y-intercept is 100, which means at a weight of 0, the rat will take 100 seconds.
“Least-squares” in the term “least-squares regression line” refers to...
Minimizing the sum of the squares of all values of the explanatory variable.
Minimizing the sum of the squares of all values of the response variable.
Minimizing the products of each value of the response variable and the predicted value based on the regression equation.
Minimizing the sum of the squares of the residuals.
Suppose a straight line is fit to data having response variable y and explanatory variable x. Predicting values of y for values of x outside the range of the observed data is called...
extrapolation
causation
correlation
interpolation
Compute the probability of selecting either an Ace or a heart in a deck of 52 cards.
30.77%
32.69%
7.69%
25%
