Question 5

According to the NPD Group, 80% of the basketball shoes purchased in 2018 by Canadian men are never worn on a basketball court. A random sample of 15 men who purchased basketball shoes in 2018 was selected. Use the Binomial table to answer the following questions.

Round all final answers to 4 decimal places and express answers in decimal form (i.e. 0.0003 instead of 0.0300%)

(a)What is the probability that no more than 10 of them do not wear the basketball shoes on the basketball court?

(b)What is the probability that exactly 10 of them do not wear the basketball shoes on the basketball court?

(c)What is the probability that at least 11 of them do not wear the basketball shoes on the basketball court?

Question 8

In a pre-election poll in the riding ofQuatre Brasin Quebec where 67% of the voters are French-speaking and 33% are English-speaking, 66 voters were randomly selected from the list of English-speaking voters and 134 were randomly selected from the list of French-speaking voters. Then, all 200 chosen voters were surveyed. This type of sampling is called

• systematic sampling
• convenience sampling
• random sampling
• cluster sampling
• stratified sampling
• None of the above.