Math 1 U10 Interim Review

Mr Cruz and his class are studying the effects of the introduction of natural fertilizers to the growth of some house plants. The following values are the measured height of 10 selected plants from his class in feet.

3, 3, 2, 2, 2.5, 3.5, 4, 1.5, 2.5, 2

Which box and whisker plot correctly represents the data?

• 
• 

Cheska will make a box-and-whisker plot using the data that she collected from her class. She asked them about the number of hours they spend on social media on a typical day. Ten of the responses are as follow:

8, 4, 5, 6, 6, 7, 7, 8, 10, 2

The minimum is 2, the maximum is 10. Determine the other values needed to create the box-and-whisker plot.

• 4

• 5

• 6

• 6.5

• 8

Ms Janet created box plots for the data she gathered comparing the scores of selected students from her first period and second period Math classes. The scores obtained by the chosen students are summarized below.

PERIOD 1 - 60, 55, 45, 80, 70, 70, 90

PERIOD 2 - 80, 80, 75, 70, 65, 70, 85

She constructed the box-and-whisker plots shown based on the data. What error did Ms Janet make in the construction of her box-and-whisker plot?

• The minimum value for the Period 1 box plot is incorrect.

• The maximum value for the Period 1 box plot is incorrect.

• The median for the Period 1 box plot is incorrect.

• The median for the Period 2 box plot is incorrect.

The ages of the respondents in a survey were considered and a box plot was made out of it. However, there were mistakes in its construction. Which part of the box plot are ACTUALLY correct based the given data?

• the median

• the lower quartile

• the middle 50% range

• the minimum and maximum values

The mean, median, and standard deviation of four data sets are shown. Which statements about data sets is correct?

• Data A is positively skewed.

• Data C is positively skewed.

• Data B and D are both positively skewed.

• Data C and D are both positively skewed.

A toy manufacturer collected data on the weight of the toys they create. The toys have a mean weight of 2.5 pounds with a standard deviation of 0.6 pound. One of the toy's parts may be removed and doing so would take off 0.5 pound it from each item. What would happen to the mean weight and standard deviation of the toys if the said part will be removed?

• The mean would be 2.0 pounds and the standard deviation will be 0.1 pound.

• The mean would be 2.0 pounds and the standard deviation will still be 0.6 pound.

• The mean would still be 2.5 pounds and the standard deviation will be 0.1 pound.

• There will be no changes in the mean and standard deviation.

Jenna wants to compare the scores from the last set of this year's 5 winning volleyball matches and last year's. The table shows this information.

What is the difference of the median score this year and the median score from last year?

• 5
• 1
• 0

• 2

The box-and-whisker plot describes the original and retake scores for a Science test from Mr Carlson's first period class. Which of the following conclusions is NOT CORRECT?

• The median score in the original test is 15 points lower than the retake.

• The range of scores in the original is the same as the range of scores in the retake.

• The percentage of students who scored from 40 to 65 in the original is the same as the students who scored from 50 to 75 in the retake.

• On average, the students scored higher in the retest.

Mr Campbell gave his students a pre-test before starting the year and the same examination as the post-test at the end of the year. Determine the increase in points the average score of the students.

• 13

• 14

• 15

• 16

Data collected comparing the average speed of five student athletes before and after training. What is the difference between the upper quartile values for the speed?

• 1

• 0.75

• 0.5

• 0.25