Inference

Mr. Nash, the school principal is gathering data about students and homework completion.  To get valid results, which survey method should he use?

• Post a link to his survey questions on the school website.
• Survey the first 40 students who walk into the cafeteria on Tuesday.
• Ask each homeroom teacher to select 4 students to answer his survey
• Have the computer randomly generate a list of students to answer his survey

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Suppose 10 out of 15 students surveyed said that they were going to attend the football game.  How many of the 3500 students in the school would you expect to attend the football game?

• 17500
• 5250
• 2333
• 1050

Tags

CCSS.7.RP.A.3

Katie and Danielle recorded their resting heart rates each morning for ten days. The double dot plot shows their heart rates in beats per minute. Which of the following statements is NOT true?

• Danielle's heart rate is more consistent.
• Katie's heart rate is more consistent.
• Katie's heart rate ranged from 57 to 75.
• Danielle's heart rate has a smaller range.

Tags

CCSS.7.SP.B.4

The manager of a computer store analyzed software sales by category for the past month. The results are shown below. If the manager plans to order 400 software packages for the upcoming month, how many of them should be home productivity?

• 16
• 100
• 325
• 75

Julia’s grades on her first five science quizzes are 80, 96, 81, 98, and 88.  What grade on the sixth quiz will give her average of exactly 90?

• 90
• 89
• 95
• 97

Tags

CCSS.7.NS.A.3

Use the box and whiskers plot to determine which statement is not true.

• The median of the men’s ages is greater than the median of the women’s ages.
• The interquartile range of the men’s ages is greater than the interquartile range of the women’s ages.
• The youngest member of the club is a woman
• The range of the men’s ages is greater than the range of the women’s ages

The box-and-whisker plots show the points scored in each Super Bowl by the AFC and NFC. About how many points greater is the interquartile range for the NFC than the AFC?

• about 20
• about 25
• about 35
• about 10

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

The data set below has random samples of airline tickets. Based on the data, which measure of central tendency will provide the most accurate representation of airline tickets?

• mean
• median
• mode

Antwan worked for 10 weeks at a summer job.  For each of the first 9 weeks, his mean earning was $250 per week.  In the last week, he earned $500 because he received a bonus.  How did the bonus affect his mean salary?

• increased by $25
• increased by  $250
• decreased by $250
• decreased by $25

Which measure of central tendency is not the same for both sets of data?

• mode
• median
• mean

Tags

CCSS.6.SP.B.5D

CCSS.HSS.ID.A.2