NEW
Font size
WorksheetsAP Stat First Semester Review
Total questions: 15
Worksheet time: 2hrs 38mins
A company wanted to determine the child care costs of its employees. A sample of 25 employees were interviewed and their child care expenses for the previous year were determined. Later, the company discovered that the highest expense in the sample was mistakenly recorded as 5 times the actual amount. However, after correcting the error, the correct amount was still greater than or equal to any other expense in the sample. Which of the following sample statistics must have remained the same after the correction was made?
variance
mean
mode
range
median
A company determines the mean and standard deviation of the employees' salaries in one year. What is the best description of the standard deviation?
Approximately the median distance between the individual salaries of employees and the mean of every employee's salary.
The amount of money separating the highest salary from the lowest salary when considering the middle 50% of the distribution.
The amount of money separating the highest salary from the lowest salary when considering all employees.
The distance between the salary of an employee and the mean salary of all the employees.
Approximately the mean distance between the individual salaries of employees and the mean of all employees' salaries.
The equation of the LSRL for the points on a scatterplot is ŷ = 5.3-0.23x. What is the residual for the point (5, 4)?
-0.15
0.15
1
0.62
0.85
The heights of adult women are approximately normally distributed about a mean of 65 inches with a standard deviation of 2 inches. If Bella is at the 87th percentile in height for adult women, then her height, in inches, is closest to
63
67
66
72
70
Andrea'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 1.75. Which of the following is the best interpretation of this standardized score?
Andrea's systolic blood pressure is 175.
Andrea's systolic blood pressure is 1.75 standard deviations above the average systolic blood pressure of women her age.
Andrea's systolic blood pressure is 1.75 above the average systolic blood pressure of women her age
Only 1.75% of women Andrea's age have a higher systolic blood pressure than she does.
Andrea's systolic blood pressure is 1.75 times the average systolic blood pressure of women her age.
At a college the scores on the Spanish final exam are approximately normally distributed, with a mean of 75 and a standard deviation of 12. The scores on the Humanities final are also approximately normally distributed, with a mean of 80 and a standard deviation of 8. A student scored 81 on the Spanish final and 84 on the Humanities final. Relative to the students in each respective class, in which subject did this student do better?
The student did better in Spanish.
The student did better in Humanities.
There is no basis for comparison, since the subjects are different from each other and are in different departments.
The student did equally well in each course.
There is not enough information for comparison.
A manufacturer makes light bulbs and claims that their reliability is 93 percent. Reliability is defined to be the proportion of non-defective items that are produced over the long term. If the company's claim is correct, what is the expected number of non-defective light bulbs in a random sample of 2,000 bulbs?
1350
1860
93
140
2000
What can be used to show a cause-and-effect relationship between two variables?
A controlled experiment
A census
An observational study
A cross-sectional study
A sample survey
The boxplots summarize two data sets, 1 and 2. Which of the following must be true?
I. Class #2 contains more data than Class #1.
II. The box of Class #2 contains more data than the box of Class #1.
III. The data in Class #1 has a smaller range than the data in Class #2.
I only
I and III only
I and II only
I, II, and III
III only
In this study, the response variable is...
