This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A potential investor collected attendance data over a period of 49 days at the North Mall and South ... (Read 70 times)

casperchen82

  • Hero Member
  • *****
  • Posts: 540
on: Aug 1, 2018
A potential investor collected attendance data over a period of 49 days at the North Mall and South Mall theaters in order to determine the difference between the average daily attendances. The North Mall Theater averaged 720 patrons per day with a variance of 100, while the South Mall Theater averaged 700 patrons per day with a variance of 96 . Develop an interval estimate for the difference between the average daily attendances at the two theaters. Use a confidence coefficient of .95.

Question 2

The reliability of two types of machines used in the same manufacturing process is to be tested. The first machine failed to operate correctly in 90 out of 300 trials, while the second type failed to operate correctly in 50 out of 250 trials.
 a. Give a point estimate for the difference between the population proportions of these machines.
  b. Calculate the pooled estimate of the population proportion.
  c. Carry out a hypothesis test to check whether there is a statistically significant difference in the reliability for the two types of machines using a .10 level of significance.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jgranad15

  • Sr. Member
  • ****
  • Posts: 345
Reply #1 on: Aug 1, 2018
Answer to Question 1

16.03 to 23.97

Answer to Question 2

a . .10
b. .2545
c. test statistic z = 2.68, p-value = .0074, reject H0


casperchen82

  • Member
  • Posts: 540
Reply 2 on: Aug 1, 2018
:D TYSM

lkanara2

  • Member
  • Posts: 329
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Did you know?

Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

Did you know?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Did you know?

Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

CycleBeads help women use the Standard Days Method. CycleBeads help women use the Standard Days Method.
The phosphorus cycle. Numbers are 1012 g P or fluxes as 1012 g P per year (data from Schlesinger 199 The phosphorus cycle. Numbers are 1012 g P or fluxes as 1012 g P per year (data from Schlesinger 199
Leopard with kill in tree in South Africa Leopard with kill in tree in South Africa
Richmond, Virginia, lies in ruins in April 1865 at the time of Lincoln’s visit—and a few days before Richmond, Virginia, lies in ruins in April 1865 at the time of Lincoln’s visit—and a few days before
A sod house in North Dakota, 1896. Individual “bricks” of sod were hewn from the ground and stacked A sod house in North Dakota, 1896. Individual “bricks” of sod were hewn from the ground and stacked
The voltage-gated channel cycles during an action potential The voltage-gated channel cycles during an action potential
Video: Genetic distance between human groups

For a complete list of videos, visit our video library