🏷️ LIMITED TIME OFFER: GET 20% OFF GRADE+ YEARLY SUBSCRIPTION →
Log in
Statistics
2
answers
0
watching
217
views

Suppose scores on an IQ test are normally distributed and suppose 20 people are randomly selected and tested. The standard deviation of the population is 15. What is the 90% confidence interval for the average test score in the sample group will be 110?

 

Watch
2
answers
0
watching
217
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share
Karol E.
Karol E.Lv8
6 Mar 2021
Already have an account? Log in
Share

Related textbook solutions

Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208

Related questions

Some IQ tests are standardized to a Normal model, with a mean of 100 and a standard deviation of 15.

  1. In what interval would you expect the central 95% of IQ scores to be found?
  2. About what % of people should have IQ scores above 115
  3. About what % of people should have IQ scores between 70 and 85?
  4. about what % of people should have IQ scores above 130?
  5. draw a model for these IQ scores. Clearly label it, showing what the 68-95-99.7 Rule predicts.

Some IQ tests are standardized to a Normal model, with a mean of 100 and a standard deviation of 15.

  1. In what interval would you expect the central 95% of IQ scores to be found?
  2. About what % of people should have IQ scores above 115
  3. About what % of people should have IQ scores between 70 and 85?
  4. about what % of people should have IQ scores above 130?
  5. draw a model for these IQ scores. Clearly label it, showing what the 68-95-99.7 Rule predicts.

 

A grading scale is set up for 1000 students test scores. It is assumed that the scores are normally distributed with a mean score of 75 and a standard deviation of 15. What is the probability a student will have a score between 45 and 75

Weekly leaderboard

Home
Homework Help 3,900,000
Statistics 10,000
Start filling in the gaps now
Log in