Question 1
The table below contains the opinions of a sample of 200 people (broken down by gender) about the latest congressional plan to fund abortion clinics.
For Neutral Against Totals
Female 38 54 12 104
Male 12 36 48 96
Totals 50 90 60 200

Find the probability that a randomly selected
a)person would be male
b)person would be for the funding
c)person would both female and neutral for funding
d)female would be against the funding
e)supporter of funding would be female

Question 2
A survey of 200 students showed the following:

130 were business majors
140 lived in the city
40 neither lived in the city or were business majors

b) Find the probability that a randomly selected student will be both a city resident and a business major.

c)Is a business major more likely to be a city resident than a nonbusiness major? Why, or why not?

Solution Preview

1) The table below contains the opinions of a sample of 200 people (broken down by gender) about the latest congressional plan to fund abortion clinics.
For Neutral Against Totals
Female 38 54 12 104
Male 12 36 48 96
Totals 50 90 60 200

Find the probability that a randomly selected
a) person would be male
b) person would be for the funding
c) person would both female and neutral for funding
d) female would be against the funding
e) supporter of funding would be female

Solution:

a) There are 200 people, out of that 96 are male.

The ...

Solution Summary

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Let us consider the following data for two raters X and Y, two categories A and B and object 1 through 16 (n=16):
(see attached file for data)
(a) Construct the 2x2 contingencytable for the two raters and two categories.
(b) Find the point estimate of the agreement between the two raters.
(c) Construct the 95% confide

Given the following contingencytable:
C D Total
A 10 30 40
B 20 40 60
Total 30 70 100
Find the probability of A and C.
a) 33.3%
b) 10%
c) 25%
Find the probability of A or C
a) 60%
b) 70%
c) 10%
Find the probability of B given C
a) 20%
b) 30%
c) 66.67%

1. When we calculate chi-square tests in hypothesis testing we use contingencytables.
a. Set up a simple contingencytable for me.
b. Highlight a cell in your table.

Develop a hypothetical contingencytable of data using a grid of 3 rows and four columns (label the rows and columns as you see fit. For example, the rows might be age, and the columns might be income level). Insert hypothetical values for each cell in the table.
Create four probability questions using the table that you a

a) Why do you use the chi-square statistic?
b) What type of data is used with chi square analysis?
c) What are the hypotheses in a chi-square test for independence?
d) How do we calculate the expected frequencies for each cell of a contingencytable?
e) How do we calculate the degrees of freedom for an r x c contingency

A=0.05 level has been specified. df=(r-1)(k-1)
r=# of rows in the contingencytable
k=# of colums in the contingencytable
In testing the independence of two variables, described in the contingencytable, determine the critical value of the chi-square

Use the following contingencytable:
Event A Event B
Event C 9 6
Event D 4 21
Event E 7 3
Determine the following probabilities:
a) P (A and C)
b) P (A and D)
c) P B and E)
d) P (A and B)

Each year, ratings are compiled concerning the performance of new cars during the first 90 days of use. Suppose that the cars have been categorized according to whether the car needs warranty-related repair (yes or no) and the country in which the company manufacturing the car is based (United States or not United States). Based

Contingency Plan Evaluation
Using a search engine of your choice, research and locate two contingency plans and use the information you find to fill out the evaluation table below.
Contingency Plan and Source Plan A: Plan B:
- Provide a brief overview of the community the contingency plan serves.
- Describe

Calculating relative frequencies in a contingencytable
A sample of 303 students at a particular university was taken. The students were classified according to their major and their gender. The results are given in the contingencytable below.
Major
Biology Business Engineering Mathematics Computer Science
Gender Female