The study described in the previous exercise also measured the fasting plasma glucose of 16 diabetics who were given individual instruction on diabetes control. Here are the data: Make a back-to-back...

1. The study described in the previous exercise also measured the fasting plasma glucose of 16 diabetics who were given individual instruction on diabetes control. Here are the data:

Make a back-to-back stemplot or side-by-side boxplot to compare the class and individual instruction groups. How do the distribution shapes and success in achieving the glucose control goal compare?

1. Burning fuels in power plants or motor vehicles emit carbon dioxide (CO₂), which contributes to global warming. Table 1.6 displays CO₂
   emissions per person from countries with population at least 20 million.

(a)
(2 points)Why do you think we choose to measure emissions per person rather than total CO₂
emissions per country?
ANSWER:

(b)
(4 points) Display the data of Table 1.6 in a graph. Describe the shape, center, and spread of the distribution. Which countries are outliers?
ANSWER:
4. Too much cholesterol in the blood increases the risk of heart disease. Young women are generally less afflicted with high cholesterol than other groups. The cholesterol levels for women aged 20 to 34 follow an approximately normal distribution with mean 185 milligrams per deciliter (mg/dl) and standard deviation 39 mg/dl.

(a)
(2 points) Cholesterol levels above 240 mg/dl demand medical attention. What percent of young women have levels above 240 mg/dl?
ANSWER:
Levels above 200 mg/dl are considered borderline high. What percent of young women have blood cholesterol between 200 and 240 mg/dl?
ANSWER:



1.140(5 points)
The quartiles of any distribution are the values with cumulative proportions 0.25 and 0.75.

(a)
(1 point)What are the quartiles of the standard normal distribution?
Using your numerical values from
(a), write an equation that gives the quartiles of the
N
(m,
s) distributions in terms of
mands.
The length of human pregnancies from conception to birth varies according to a distribution that is approximately normal with mean 266 days and standard deviation 16 days. Apply your result from
(b): what are the quartiles of the distribution of lengths of human pregnancies?