Expert answer:Statistics module 4 homework help

Answer & Explanation:need this as fast as possibleg310_mod04_homework.docx
g310_mod04_homework.docx

Unformatted Attachment Preview

Name:______________________________________
Module 4 Homework Assignment
1. Determine whether the samples are independent or dependent.
The effectiveness of a new headache medicine is tested by measuring the amount of time before the
headache is cured for patients who use the medicine and another group of patients who use a placebo
drug. Explain.
Solution:
Instructor Comments:
2. Determine whether the samples are independent or dependent.
The effectiveness of a headache medicine is tested by measuring the intensity of a headache in patients
before and after drug treatment. The data consist of before and after intensities for each patient.
Explain.
Solution:
Instructor Comments:
3. In a random sample of 500 people aged 20-24, 22% were smokers. In a random sample of 450 people
aged 25-29, 14% were smokers. Test the claim that the proportion of smokers in the two age groups is
the same. Use a significance level of 0.01. Show all steps of the hypothesis test and all calculations.
Solution:
Instructor Comments:
4. A researcher wishes to determine whether people with high blood pressure can reduce their blood
pressure by following a particular diet. Use the sample data below to construct a 99% confidence
interval for µ1 – µ2 where µ 1 and µ2 represent the mean for the treatment group and the control group
respectively. Show all steps of the hypothesis test and all calculations. Use the following t-distribution
table – http://www.itl.nist.gov/div898/handbook/eda/section3/eda3672.htm
Treatment Group
n1 = 85
x1 = 189.1
s1 = 38.7
Control Group
n2 = 75
x2 = = 203.7
s2 = 39.2
Solution:
Instructor Comments:
For questions 5 – 9 below, use the traditional method of hypothesis testing to test the given claim about
the means of two populations. Assume that two dependent samples have been randomly selected from
normally distributed populations.
Five students took a math test before and after tutoring. Their scores were as follows.
Student
A
B
C
D
Before
71
66
67
77
After
75
75
65
80
E
75
87
Using a 0.01 level of significance, test the claim that the tutoring has an effect on the math scores.
5. State the null and alternative hypotheses.
Solution:
Instructor Comments:
6. Find d, d , and sd,
Solution:
Instructor Comments:
7. Find the value of the test statistic, t.
Solution:
Instructor Comments:
8. Find the critical value(s) and state the decision about the null hypothesis.
Solution:
Instructor Comments:
9. State the conclusion in non-technical terms.
Solution:
Instructor Comments:
…
Purchase answer to see full
attachment

How it works

1. Paste your instructions in the instructions box. You can also attach an instructions file
2. Select the writer category, deadline, education level and review the instructions 
3. Make a payment for the order to be assignment to a writer
4.  Download the paper after the writer uploads it 

Will the writer plagiarize my essay?

You will get a plagiarism-free paper and you can get an originality report upon request.

Is this service safe?

All the personal information is confidential and we have 100% safe payment methods. We also guarantee good grades