Question 1
The histogram shows suicide rates per 100,000 residents of Country X and the number of states that had these rates. Use this histogram to solve the problem.
(i) Find the median suicide rate per 100,000 residents for Country X by state.
(iii) Find the third quartile by determining the median of the upper half of the data.
◦ (i) median = 18;
(ii) third quartile = 22.5
◦ (i) median = 19;
(ii) third quartile = 22
◦ (i) median = 19.5;
(ii) third quartile = 20.5
◦ (i) median = 18;
(ii) third quartile = 21
Question 2
A survey was conducted of 371 teenagers. Thirty-five percent of the teenagers said they occasionally smoked cigarettes. a. Find the margin of error for this survey. b. Write a statement about the percentage of teenagers who occasionally smoke cigarettes.
◦ a. ± 5.2% b. There is a 95% probability that the true population percentage lies between 29.8% and 40.2%.
◦ a. ± 5.2% b. There is a 95% probability that the true population percentage lies between 24.8% and 35.2%.
◦ a. ± 5.2% b. There is a 99% probability that the true population percentage lies between 29.8% and 40.2%.
◦ a. ± 19.261% b. There is a 95% probability that the true population percentage lies between 29.8% and 40.2%.
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