Question Details

(solution) This is for a statistics class and I have to show work.


This is for a statistics class and I have to show work.  


Problem Solving Assignment - Week 5

 

Chapter 8 - Exercises: 2, 4, 8

 

2. The producers of a new toothpaste claim that it prevents more cavities than other brands of

 

toothpaste. A random sample of 60 people used the new toothpaste for 6 months. The mean

 

number of cavities at their next checkup is 1.5. In the general population, the mean number of

 

cavities at a 6-month checkup is 1.73 (? = 1.12). a. Is this a one- or two-tailed test?

 

b. What are H0 and Ha for this study?

 

c. Compute zobt.

 

d. What is zcv?

 

e. Should H0 be rejected? What should the researcher conclude?

 

f. Determine the 95% confidence interval for the population mean, based on the sample mean. 4. Henry performed a two-tailed test for an experiment in which N = 24. He could not find his

 

table of t critical values, but he remembered the tcv at df = 13. He decided to compare his tobt with

 

this tcv. Is he more likely to make a Type I or a Type II error in this situation? 8. A researcher believes that the percentage of people who exercise in California is greater than

 

the national exercise rate. The national rate is 20%. The researcher gathers a random sample of

 

120 individuals who live in California and finds that the number who exercise regularly is 31 out

 

of 120. a. What is ?2obt?

 

b. What is df for this test?

 

c. What is ?2cv?

 

d. What conclusion should be drawn from these results?

 


Solution details:

Pay using PayPal (No PayPal account Required) or your credit card . All your purchases are securely protected by .
SiteLock

About this Question

STATUS

Answered

QUALITY

Approved

DATE ANSWERED

Sep 13, 2020

EXPERT

Tutor

ANSWER RATING

GET INSTANT HELP/h4>

We have top-notch tutors who can do your essay/homework for you at a reasonable cost and then you can simply use that essay as a template to build your own arguments.

You can also use these solutions:

  • As a reference for in-depth understanding of the subject.
  • As a source of ideas / reasoning for your own research (if properly referenced)
  • For editing and paraphrasing (check your institution's definition of plagiarism and recommended paraphrase).
This we believe is a better way of understanding a problem and makes use of the efficiency of time of the student.

NEW ASSIGNMENT HELP?

Order New Solution. Quick Turnaround

Click on the button below in order to Order for a New, Original and High-Quality Essay Solutions. New orders are original solutions and precise to your writing instruction requirements. Place a New Order using the button below.

WE GUARANTEE, THAT YOUR PAPER WILL BE WRITTEN FROM SCRATCH AND WITHIN A DEADLINE.

Order Now