AP Statistics

What shape is a normal distribution curve?

• Half curve

• Round curve

• Bell curve

• Square curve

The scores on a university examination are Normally distributed with a mean of 62 and a standard deviation of 11. If the bottom 5% of students will fail the course, what is the lowest mark that a student can have and still be awarded a passing grade?

• 40

• 43

• 44

• 57

• 62

The stem-and-leaf diagram below gives the distribution of the ages in years of 20 participants at a family reunion. Which of the following statements about the distribution is correct?

• The distribution of ages is skewed left.

• The median age was 45 years old.

• The oldest person in attendance was 98.

• 20% of the attendees are younger than 10 years old.

Of the following dotplots, which represents the set of data that has the greatest standard deviation?

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• 
• 
• 
• 

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.

The ___________________ measures the percent of the variability in the response variable that is accounted for by the least-squares regression line.

• correlation r

• 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

Tags

CCSS.HSF-LE.A.1B

An independent research company wants to go door to door to survey people in the city of Fontana. The company decides to number all blocks within the city limit, randomly choose 1 block and survey all households on that block. This is an example of:

• Simple Random Sample

• Stratified Random Sample

• Cluster Random Sample

• Systematic Random Sampling

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