Statistics Flashcards
Compare the median
Paula’s Median: 6
Emma’s Median: 4
Which of the following methods could produce a random sample?
A. Select names from a hat.
B. Select the oldest students.
C. Select the top-scoring students.
D. Select the first people who volunteer.
A. Select names from a hat.
A student wants to research the number of students in his middle school who ride the school bus. Which of the following is the best method to obtain an unbiased sample?
A) Asking all of the students in the library on Thursday if they ride the school bus
B) Asking a random sample of 100 students during lunchtime if they ride the school bus
C) Asking a random sample of 50 students from his grade if they ride the school bus
D) Asking all of the students in the gymnastics team if they ride the school bus
B) Asking a random sample of 100 students during lunchtime if they ride the school bus
A manager samples the receipts of every tenth person who goes through the line at a local craft store. Out of 40 people, 28 used a coupon. If 500 people visit this store on a given day, how many people would you expect to use a coupon?
350 people
The math department at Greenview Middle School purchased new calculators last year. In Mrs. Wamble’s math classroom, these calculators are constantly breaking. She randomly selected 10 calculators and found that 3 of them were broken. If the department purchased 240 calculators, how many would you expect to be broken?
72 calculators
Calculate the measures of center (mean, median and mode)
Mean: 12
Median: 12
Mode: 12
Calculate the measures of center (mean, median and mode)
Mean: 11
Median: 11
Mode: 11
B
Which statement is correct?
A
D
D
