# Homework1 083114 Essay

Submitted By Isabellamcandrews555
Words: 622
Pages: 3

Psychology 2101
Homework 1

due 09/16/14
(at the beginning of class)

Name: _______________

"Most people would sooner die than think; in fact, they do so."
––Bertrand Russell
(where appropriate)! Partial credit may save you. Please write neatly. Total = 30 points.
1.

Let's say you collect sample data from N = 11 individuals. Here they are:

Subject
(subnum)
1
2
3
4
5
6
7
8
9
10
11

Political
Conservatism
(consv)

Newspaper
(news)

1
1
2
2
3
3
3
3
4
4
5

yes no yes yes no yes no no yes no no

Use the consv data to make a frequency table (this is a 1-5 Likert scale, where 1 =
"very liberal" and 5 = "very conservative"). Include columns for political conservatism, frequency, cumulative frequency, relative frequency, and cumulative relative frequency. Confirm that the final cumulative frequency = N and that the final cumulative relative frequency = 1.0 [4]
2.

By hand, draw a frequency plot for consv. Use it to determine the probability that a randomly selected individual will be a "2" on the scale. [3]

3.

Which one of the following does not belong, and why? [2] n ∑x

i

x

µ

i =1

n

µˆ

4.

Imagine an intelligence test that has been normed to have a population mean of
100. If it is known that σ = 15 , what is the probability that a randomly selected individual will have a score less than +79.4? [2]

5.

For the following, indicate whether the scale is nominal, ordinal, interval, or ratio.

Psychology 2101
Homework 1

due 09/16/14
(at the beginning of class)

Name: _______________

(a) Air pressure in a tire