Data & Statistics Unit Study Guide

I CAN COMPARE TWO POPULATIONS BASED ON RANDOM SAMPLES. 1. A random sample from the 6th and 7th grade student population was taken to determine which clubs were the most popular. YEARBOOK | STUDENT COUNCIL | JUMP ROPE 6TH GRADE: 10 | 24 | 6 7TH GRADE: 18 | 20 | 2 a. If there are 280 6th graders and 200 7th graders, then how many more 7th graders are involved in the yearbook?

• 4 more 7th graders

• 8 more 7th graders

• 10 more 7th graders

• 12 more 7th graders

What percent of 6th graders are involved in the yearbook club?

• 10%

• 20%

• 30%

• 40%

I CAN COMPARE TWO POPULATIONS BASED ON RANDOM SAMPLES. 1. A random sample from the 6th and 7th grade student population was taken to determine which clubs were the most popular. YEARBOOK | STUDENT COUNCIL | JUMP ROPE 6TH GRADE: 10 | 24 | 6 7TH GRADE: 18 | 20 | 2 c. The school decides to drop any club with less than 5% of the population enrolled. Should any clubs be dropped?

• Yes, Jump Rope should be dropped.

• No, all clubs have more than 5% enrollment.

• Yes, Yearbook should be dropped.

• Yes, Student Council should be dropped.

I CAN USE DATA FROM A RANDOM SAMPLE TO MAKE INFERENCES. 2. An internet company randomly selected 50 of its customers and asked them how many hours per week they use the internet. Of those surveyed, 28 use the internet more than 15 hours per week. Based on the data, if the company has 800 subscribers, how many use more than 15 hours per week?

• 448

• 450

• 452

• 454

By how many percentage points is Candidate A leading?

• 5 percentage points

• 10 percentage points

• 15 percentage points

• 20 percentage points

The following data set represents the number of minutes 20 students spent reading at home. NUMBER OF MINUTES: 20, 25, 30, 35, 40, 45 FREQUENCY: 3, 4, 7, 1, 3, 2 Mean: _______ Median: _______

• Mean: 30 Median: 30

• Mean: 32 Median: 30

• Mean: 35 Median: 35

• Mean: 28 Median: 28

The following data set represents the number of drinks made at a smoothie shop each day. 94, 72, 110, 88, 79, 84, 113, 92, 108, 115 Mean: _______ Median: _______

• Mean: 95.5 Median: 91

• Mean: 90 Median: 92

• Mean: 100 Median: 100

• Mean: 85 Median: 85

The following data set represents the number of dolphins seen from a cruise ship each day for the past 5 days. 12, 15, 13, 22, 18 NUMBER OF DOLPHINS: 12, 15, 13, 22, 18 DISTANCE FROM MEAN: TOTAL DEVIATION: a. Mean: _______ MAD: _______

• Mean: 16 MAD: 3.2

• Mean: 16 MAD: 4.2

• Mean: 15 MAD: 3.2

• Mean: 15 MAD: 4.2

6b. The MAD represents what in the context of the situation?

• Mean Absolute Deviation

• Maximum Allowable Deviation

• Minimum Average Deviation

• Median Absolute Deviation

Q1: _______ Q3: _______ IQR: _______