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

Author Question: A researcher is interested in whether students who attend private elementary schools do any better ... (Read 127 times)

mia

  • Hero Member
  • *****
  • Posts: 564
on: Jun 19, 2018
A researcher is interested in whether students who attend private elementary schools do any better on a standard test of intelligence than the general population of elementary school children. A random sample of 75 students at a private elementary school is tested and has a mean intelligence test score of 103.5 . The average for the general population of elementary school children is 100 (s = 15).
 
  What will be an ideal response?

Question 2

A snack food company is developing a new flavor for crackers and asks customers to text their preference between two possibilities. What kind of sampling is being used?
 
  a. quota
 b. non-quota
 c. probability
 d. nonprobability


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

chem1s3

  • Sr. Member
  • ****
  • Posts: 320
Reply #1 on: Jun 19, 2018
Answer to Question 1

a) Is this a one- or a two-tailed test?
This is a two-tailed test.

b) What are H0 and Ha for this study?
H0: mprivate school children = mchildren in general population; Ha: mprivate school children  mchildren in general population

c) Compute zobt.
zobt = 2.02

d) What is zcv?
1.96

e) Should H0 be rejected? What should the researcher conclude?
Yes, H0 should be rejected. The research should conclude that children in private schools do
score higher on a general test of intelligence in comparison to children in the general
population.

f) Calculate the 95 confidence interval for the population mean, based on the sample mean.
74.1-132.9

Answer to Question 2

d


mia

  • Member
  • Posts: 564
Reply 2 on: Jun 19, 2018
Wow, this really help

helenmarkerine

  • Member
  • Posts: 324
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Did you know?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Did you know?

Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

Did you know?

The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

Did you know?

Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

Many former slaves understood that illiteracy was an implement of bondage. The Freedmen’s Bureau bui Many former slaves understood that illiteracy was an implement of bondage. The Freedmen’s Bureau bui
Angry jeers from whites rain down on Elizabeth Eckford, one of the first African American students ... Angry jeers from whites rain down on Elizabeth Eckford, one of the first African American students ...
On average, students in Roman Catholic schools score higher on national tests than students in ... On average, students in Roman Catholic schools score higher on national tests than students in ...
Private Practice Massage Therapy Business Plan Cont Private Practice Massage Therapy Business Plan Cont
The percentage of Canadian students in Grades 7 through 12 who used drugs The percentage of Canadian students in Grades 7 through 12 who used drugs
An example of continuous variation: biology students organized according to height. An example of continuous variation: biology students organized according to height.
Video: Carpal Tunnel Syndrome

For a complete list of videos, visit our video library