1Compose a Word document that answers the following question

1-Compose a Word document that answers the following questions:

Hair color, gender and birthplace are all examples of (____) variables.

A Geiger counter measures the number of particles emitted by a radioactive element in counts per minute. Radioactive emissions are an example of (______) variables.

When researchers study sudden infant death syndrome (SIDS), what do they usually specify as the variable of interest?


                    Table 1

Age at Death

Sample Size

6

10

10

20

12

34

18

8

2-Using the data in Table 1, answer the following questions:

   * What is the relative frequency of SIDS at age 6 months?

   * What is the proportion of SIDS death for infants less than or equal to 10 months old?

Solution

1-Compose a Word document that answers the following questions:

1.

Hair color, gender and birthplace are all examples of qualitative variables.

A Geiger counter measures the number of particles emitted by a radioactive element in counts per minute. Radioactive emissions are an example of quantitative variables.

When researchers study sudden infant death syndrome (SIDS), what do they usually specify as the variable of interest? Age of Infant

2.

Total sample size is 72.

So relative frequency of SIDS at age 6 months is 10/72=0.1389

There are total 10+20=30 infants less than or equal to 10 months so proprotion of SIDS death for infants less than or equal to 10 months old is 30/72=0.417