Test Prep Test Prep Certifications SBAC Questions & Answers

• Question 31:

  Ashley's class is doing experiments with probability. They have a box with 3 green balls, 2 blue balls, and 5 red balls.

  Ashley takes a ball from the box, keeps the ball, and passes the box to Manuel.

  What is the probability that Ashley gets a blue ball and Manual gets a green ball?

  A. 0.05

  B. .066

  C. 0.053

  D. 0.06

  Correct Answer: B

• Question 32:

  

  Students in a business class are studying the performance of XYZ Widgets over the past 6 years. This is a scatterplot of yearly sales and a linear model trend line of the data. Several students are predicting the performance of the company in year 7. Which of these is not a reasonable interpretation of the attached model?

  A. They are showing steady growth after the problem year and so they should make about 150 million dollars.

  B. The result 3 years ago is unusual for this company. Except for that year, they have been making about 140 million dollars each year and so that is what they will make next year.

  C. The trend is slightly negative, so they will make about 138 million dollars.

  D. Next year they will make 180 million dollars. They already had a really bad year and so they are due for a really good year.

  Correct Answer: D

• Question 33:

  

  Students in a business class are studying the performance of XYZ Widgets over the past 6 years. This is a scatterplot of yearly sales and a linear model trend line of the data. Which of these best represents the line between the point at label D and the trend line in the attached graphic?

  A. interquartile range

  B. inercept

  C. residual

  D. standard deviation

  Correct Answer: C

• Question 34:

  Sarah took 8 tests in her history class. Her highest score was 94 and her lowest score was 82.

  On the 9th test of the semester, she got a 96.

  Using this information, how did her mean score change when the last test was included?

  A. It was unchanged

  B. It cannot be determined from the given information

  C. It increased.

  D. It decreased.

  Correct Answer: C

• Question 35:

  James is training for the cross-country team. As part of his training he does a set of pushups for a minute every day. Over the past 3 days, he did 43, 40, and 45 pushups in these one-minute sessions.

  On the 4th day, what is the minimum number of pushups he must do in order to increase his average?

  A. 43

  B. 46

  C. 45

  D. 42

  Correct Answer: A

• Question 36:

  

  Students in a business class are studying the performance of XYZ Widgets over the past 6 years. This is a scatterplot of yearly sales and a linear model trend line of the data. Referring to the attached graph and information, which of these best describes the point on the line near label A?

  A. intercept

  B. slope

  C. correlation coefficient

  D. residual

  Correct Answer: A

• Question 37:

  A drug company is evaluating a new method to measure levels of sugar in blood samples. The test is run hundreds of times on samples where the true level of sugar is already known. No test will be perfectly accurate all of the time, but it is

  important that the result of any test be as close to the correct value as possible.

  Which of these statistical measures will be most helpful in determining if the testing method in the attached description meets this condition?

  1.

  the mode of the test results

  2.

  the mean of the test results

  3.

  the minimum and maximum values of the test results

  4.

  the standard deviation of the test results

  A. 3 and 4

  B. 1 and 2

  C. 3 only

  D. 2 only

  Correct Answer: A

• Question 38:

  Rachel is going to buy a coffee-maker for her apartment. After some research she found 5 different coffee-makers for these prices:

  $62.99 $77.99 $43.99 $17.99 $66.99

  Her aunt advised her that spending about the median amount will be a good deal, while spending about the mean amount will just be average. After looking at the prices, she decided that average will be good enough.

  Read the attached description of a purchase decision process. How much did Rachel save by spending closer to the mean than spending closer to the median?

  A. $10.80

  B. $8.20

  C. $0 because it was the same unit

  D. $19

  Correct Answer: D

• Question 39:

  Victoria kept track of her weekly calorie intake, weight, and height. She summarized her results in the table shown here.

  

  Which of these conclusions can be made from the data in the attached passage?

  1.

  If you gain weight you will get taller.

  2.

  No conclusions can be made from this data.

  3.

  The more you eat the taller you get.

  4.

  The more you eat the heavier you get.

  A. 4

  B. 3 and 4

  C. 2

  D. 1 and 3

  Correct Answer: A

• Question 40:

  Victoria kept track of her weekly calorie intake, weight, and height. She summarized her results in the table shown here.

  

  Rafael is convinced that eating helps you grow taller and is puzzled by these results. Which of these statements could you use to help him understand these results?

  1.

  Victoria measured her height with a bad ruler.

  2.

  Five weeks might be too short a time to see an increase in height

  3.

  Victoria ate the wrong foods to stimulate growth.

  4.

  The results show correlation and not causation.

  A. 1 and 3

  B. 2 and 4

  C. 1

  D. 4

  Correct Answer: B