Question

The accompanying data shows the weekly purchases of printers at a particular electronic store. Using

alpha α equals=0.050 perform a chi-square test to determine if the number of printers sold per week follows a normal probability distribution. Note that

x bar equals=10.91 and s equals=4.34.

Data: 7,14,12,16,13,14,4,7,3,2,16,5,15,14,10,11,18,11,13,6,9,9,11,10,16,9,8,15,6,19,11,3,9,13,6,14,10,13,13,12,10,11,6,17,19

What is the P- Score Test Statistic, and Critical Value

Answer #1

Using the accompanying data below, perform a chi-square test
using
α=0.025
to determine if the proportion of "Yes" observations differs
between Populations A and B.
Observed frequencies:
Population
Yes
No
A
22
24
B
18
16
Expected frequencies:
Population
Yes
No
A
23
23
B
17
17
What are the null and alternative hypotheses?
A.
H0:
pA≠pB
H1:
pA=pB
B.
H0:
pA=pB
H1:
pA<pB
C.
H0:
pA=pB
H1:
pA>pB
D.
H0:
pA=pB
H1:
pA≠pBYour answer is correct.
What is the...

Use the GSS dataset to answer the questions below. All analysis
must be completed using your own GSS data set. Failure to use your
own GSS data set will result in a zero for the question. As above,
you will need to read and interpret the question to determine which
statistical test is appropriate, as well as whether it is a
one-tailed or two-tailed test. Similar to the questions above, you
must: 1. State the null and research hypotheses 2....

Suppose a student organization at a university collected data
for a study involving class sizes from different departments. The
following table shows the average class size from a random sample
of classes in the business school vs. the average class size from a
random sample of classes in the engineering school. Data for the
sample sizes and standard deviations are also shown. Use this data
to complete parts a through c.
Business
Engineering
Sample mean
39.9
30.9
Sample standard deviation...

First National Bank and City National Bank are competing for
customers who would like to open IRAs (individual retirement
accounts). Thirty-two weeks were randomly selected for First
National Bank and another (different) 32 weeks were randomly
selected for City National. The total amount deposited into IRAs is
noted for each week. A summary of data (deposits are recorded in
thousands of dollars) from the survey is as follows: First
National: x-bar = 4.1, sigma = 1.2 City National: x-bar =...

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