# Question

In 1991, researchers conducted a study on brain size as measured by pixels in a magnetic resonance imagery (MRI) scan. The numbers are in hundreds of thousands of pixels. The data table provides the sizes of the brains and the gender.

a. Is the format of the data set stacked or unstacked?

b. Explain the coding. What do 1 and 0 represent?

c. If you answered “stacked” in part a, then unstack the data into two columns labeled Male and Female. If you answered “unstacked,” then stack the data into one column; choose an appropriate name for the stacked variable.

Brain Male

9.4 .......... 1

9.5 .......... 0

9.5 .......... 1

9.5 .......... 1

9.5 .......... 0

9.7 .......... 1

9.9 .......... 0

a. Is the format of the data set stacked or unstacked?

b. Explain the coding. What do 1 and 0 represent?

c. If you answered “stacked” in part a, then unstack the data into two columns labeled Male and Female. If you answered “unstacked,” then stack the data into one column; choose an appropriate name for the stacked variable.

Brain Male

9.4 .......... 1

9.5 .......... 0

9.5 .......... 1

9.5 .......... 1

9.5 .......... 0

9.7 .......... 1

9.9 .......... 0

## Answer to relevant Questions

The accompanying table gives ages for some of the students in two statistics classes. One class met at noon and the other at 5 p.m. a. Is the format for the data set stacked or unstacked? b. If you answered “stacked,” ...a. A statistics class is made up of 15 men and 23 women. What percentage of the class is male? b. A different class has 234 students, and 64.1% of them are men. How many men are in the class? c. A different class is made up ...The accompanying table gives the population of the six U.S. states with the largest populations in 2008 and the area of these states. a. Determine and report the rankings of the population density by dividing each ...Some people believe that wearing copper bracelets is a good treatment for arthritis of the hand. To test this belief, suppose you recruit 100 people and supply them all with copper bracelets. After the patients wear the ...Describe the design of a controlled experiment to determine whether the use of vitamin D supplements reduces the chance of broken bones in women with osteoporosis (weak bones). Assume you have 200 women with osteoporosis to ...Post your question

0