View the step-by-step solution to:

Suppose it is known that the IQ scores of a certain population of adults are approximately normally distributed with a standard deviation () of 15.

















Suppose it is known that the IQ scores of a certain population of adults are approximately normally distributed with a standard deviation (σ) of 15. A simple random sample of 25 adults drawn from this population had a mean IQ (x ̅) score of 105. On the basis of these data can we conclude that the mean IQ score for the population is not 100? Let the probability of committing a type I error be 0.05. The values in the following tables are critical values for two sided hypothesis testing.


Level of significance (α) Critical Value
0.10 1.645
0.05 1.960
0.025 2.326
0.01 2.575

question 1. Formulate the null and alternative hypotheses
question 2 What test statistics is appropriate for this
hypothesis testing?
question 3 Compute your test statistic
question 4. What is your conclusion based on the test you
performed in step iii above?



Sign up to view the entire interaction

Top Answer

Dear Student Please find... View the full answer

Statistics and Probability-8196291.doc

8196291 Suppose it is known that the IQ scores of a certain population of
adults are approximately normally distributed with a standard
deviation (σ) of 15. A simple random sample of 25 adults...

Sign up to view the full answer

Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.

-

Educational Resources
  • -

    Study Documents

    Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

    Browse Documents
  • -

    Question & Answers

    Get one-on-one homework help from our expert tutors—available online 24/7. Ask your own questions or browse existing Q&A threads. Satisfaction guaranteed!

    Ask a Question
Ask a homework question - tutors are online