Determine whether the following is a statistic or a parameter:

1.The International Dairy Foods Association (IDFA) randomly samples 50 male teenagers and finds a mean of 1081 milligrams of calcium/day.

2.A sample of Medtronics rechargeable implanted spine simulator batteries lasted an average of seven years.

3.An education official wants to estimate the proportion of adults aged 18 or older who had read at least one book during the previous year.

Multiple Choice, True/False

4.The mean is a better measure of location when there are no outliers.

a.True

b.False

5.All the following are ways in which we can quantify disease EXCEPT:

a.Ratios

b.Proportions

c.Prevalence

d.Percentiles

6.Prevalence is defined as the

a.Proportion of healthy people becoming sick over time.

b.Proportion of sick people over time.

c.Proportion of sick people at a specific time

d.Proportion of healthy who become sick at a specific time

7.The complement of the event "It's going to rain" is "it might not rain".

a.True

b.False

8.A sample of 5 body weights (lbs) is given: 116, 168, 124, 132, 110. The sample variance is:

a.520

b.20.4

c.22.8

d.416

9.The 50^th percentile is also known as the 1^st quartile.

a.True

b.False

A study is conducted to find a relationship between heavy alcohol use during the first trimester of pregnancy and miscarriage. 100 women who suffered miscarriage are enrolled along with 60 women who delivered full-term. Each participant's use of alcohol during pregnancy is found via survey. The data are shown here.

Miscarriage

Delivered Full-Term

Heavy Alcohol Use

83

24

No Heavy Alcohol Use

17

36

10.What is the incidence of miscarriage in this study?

a.0.625

b.0.375

c.0.669

d.0.331