Statistics and Probability

Which of the following are examples of QUALITATIVE data?

• How many boys are at your school?

• What is your favorite ice cream flavor?

• What color shirt are people wearing today?

• How many students are excited about the football game?

Which of the following are exampled of QUANTITATIVE data?

• How many boys are at your school?

• What is your favorite ice cream flavor?

• What color shirt are people wearing?

• How many students are excited about the football game?

Which of the following are statistical questions?

• How many cars does your family have?

• How long does it take to do your homework each night?

• Did you watch TV last night?

• What is the average height of students in your grade?

Which of the following are NOT statistical questions?

• How many cars does your family have?

• How long does it take you to do your homework each night?

• Did you watch TV last night?

• What is the average height of the students in your grade?

Which of the following situations has HIGH variability?

• How much do people spend on their food at a restaurant?

• How many cell phones do you use?

• What grade did each student earn on the last math test?

• How many bathrooms are in your home?

Which of the following situations has LOW variability?

• How much do people spend on their food at a restaurant?

• How many cell phones do you use?

• What grade did each student earn on the last math test?

• How many bathrooms are in your home?

Janet has 30 classmates in her classroom.  18 of those classmates are girls.  If there are a total of 500 students in her school, approximately how many students are girls?

• 18/30

• 250

• 300

• 1/2

John swims 2.5 miles and sees a total of 12 fish. If John swims for a total of 8 miles approximately how many fish will John see?

• around 36

• 38.4, so 38, because we don't count partial fish. Ew.

• 20

• None. John is hallucinating in a kiddie pool on the patio where there are no fish, and he'd have to swim in circles for hours to cover 8 miles worth of distance. But, hey, as long as he's happy, right?

There's a prize for guessing the number of marbles in a large jar, and you really want that prize. It's a big jar--it holds 2,500 cubic inches worth of marbles. You lean really close to the glass and you're pretty sure there are about 27 marbles in an area of about 2 cubic inches. About how many marbles are in the jar?

• 25,000

• 67,500

• 27,000

• 33,750

Which of the following is the BEST example of sampling? (The school has 2,000 total students enrolled).

• To find out how many students in the school prefer cookies to cake, they interviewed all 12 members of the cooking club--10 girls and 2 boys who all love desserts.

• To find the average of the hours each student spends playing video games each week, they interviewed both the chess club and the sewing club, because putting the two clubs together gave them 20 people, 10 girls and 10 boys.

• To find out how students like eating breakfast at school each day, they watch the breakfast line every day for a five-day week and interview students as they are leaving the line. It ended up being 85 students in total.

• To find out how many hours students spend online every day, they sent out a post on the school's Facebook page and those who want to can self-report. In the first day, over 800 people responded.