Refer to Data Set 4 in Appendix B and assume that the samples are simple random samples obtained from normally distributed populations.
a. Construct a 95% confidence interval estimate of the mean amount of nicotine in cigarettes that are king size, nonfiltered, nonmenthol, and non-light.
b. Cons...

Discuss the strengths and weaknesses of correlational and regression studies; discuss concepts such as positive and negative correlations, correlation coefficients, confounding, and causality.

1) Write a paper (750-1,000 words) regarding the use of the Spearman rank correlation coefficient by Messina, et al. in "The Relationship between Patient Satisfaction and Inpatient Admissions Across Teaching and Nonteaching Hospitals," listed in the module readings.
2) Comment on what variables wer...

[1] The data in DJIA.xls represent the closing values of the Dow Jones Industrial Average (DJIA) from 1979 through 2008.
a) Plot the time series.
b) Find a three-years moving average to the data and plot the results.
c) Using a smoothing coefficient of W= 0.30, exponentially smooth the series and...

MM570 Applied Statistics for Psychology
Unit 6 Project: Descriptive Statistics
Review Sheet
Place all answers, work, and graphs in this document.
Use alpha = .05 for all hypothesis testing questions.
** Please use non-directional two-tailed tests for these questions (not one-tailed tests).
...

See the attached files.
1. Using regression analysis, (i.e. do not use the forecast function in Excel) forecast the average annual consumption of natural gas for each group in 2014. That is, how much natural gas is consumed during an average month? How confident would you be in concluding the ...

Assume the financing gurus of a weekend investment television program predicted a 50% chance of XYZ stock gaining in January and a 50% chance of gaining in February. Your financial advisor sees this and tells you there is a 100% chance XYZ stock will gain over the 2-month period. Would you continue ...

This is an analytic review that needs to be done using the data computed in minitab. The guidlines for the review and the problem have been uploaded as well
1) Use Minitab software to generate the output used in your analysis. The file
containing the problem data, <AIRFORCE.MTW
2) You are exp...

Stochastic Operations Research
Read: Sections 12.3 - 12.5, 13.1, 13.4-13.6 in "Winston, Operations Research: Application and Algorithms, 4th edition, 2004, Thompson, ISBN 0-534-38058-1."
Question 1
Diamond and Forrester (1979) applied Bayes' rule to the diagnosis of coronary artery disease....

I assume my scenario will have to include enough information to answer the questions below so I will need help with this one as well
Create and write your own scenario about a specific population. Then, answer the following questions about your scenario:
What are the mean, standard deviation,...

1. What percentage of the area under the normal curve lies
a. To the left of the mean?
b. Between μ - 2σ and μ + 2σ?
c. More than three standard deviations above the mean?
2. Over an entire summer, an amusement park gets an average of 21.7 people per day that have to go to the infirmar...

5. A continuous random variable has a probability density function: f(x) = Ax^2
for 0 (less than or equal to) x (less than or equal to) 3.
(a) What is the value of A?
(b) What is the cumulative probability function of random variable x?
(c) What is the expected value?
(d) What is the varia...

A student had exams in math and Spanish. On the math the mean was u=30 and o= 5 and the student had a score of x=45. On the Spanish exam the mean was u= 60 and o=8 and the student has a score of x=68 . For which class can the student expect the better grade?
What is the z score corresponding to t...

Please explain how I set up and solve this problem:
For each of the populations would a score of x= 50 be considered a central score (near the middle of the distribution) or an extreme score (far out of the tail of the distribution ) is this set up x-u/o?
u=45 o= 10
u=45 o= 2
u= 90 o= 20
u=...

Please help me calculate the ss, variance and standard deviation for this.
n=4 scores are 7, 4, 2, 1
(do i figure the mean here 1st? 3.5?)
ss____
variance____
standard deviation____
Also if a population has a mean of 80 and standard deviation of 20 would the score of x=70 be considered ext...

1. Identify the class width, class midpoints, and class boundaries for the given frequency distribution.
White Blood Cell Count for Males Frequency
4.0 - 5.9 8
6.0 - 7.9 ...

It is attached it is to show that if all Xi are normally distributed then
Y=a1X1+a2X2+...+anXn
Also is normally distributed
But please see the attachment as the question is a bit more specific than that as well. Thanks
File is uploaded in pdf and word

12. A college using a new method of teaching calculus wishes to evaluate the effectiveness of the method. A class of 24 first-year college students was randomly divided into two sections, one of which was taught using the new method and the other taught using the old method. Scores on the end-of-se...

Please help with this multi-part question on statistics:
The YUMM cereal company distributes Colored Sugar Cereal. Each box is supposed to contain 450 grams of cereal. They also sell cereal in a "2-pack," where each "2-pack" contains 2 boxes of cereal. The 2-packs are supposed to have a total weig...

Refere to attachment for better formula representation. Let (Y1, Y2,...Yn) be a random sample from a uniform probability density functions (p.d.f) given by:
f (y;theta) = (1-theta)^-1, theta<y<1
a. Find the mean of Y and shown that the variance of Y is (1-theta)^2/12
b. Show that theta = 2(sum ...

Let x1, x2,.....xn be a random sample from a Poisson distribution with parameter lamda, that is the p.d.f is
see attached
What is the maximum likelihood estimator of lamda? Is it fully efficient in small samples?

You have taken data from a production process in order to develop an Xbar control chart. You have 25 samples of data with 5 parts measured in each sample to get the Xbar and R (Range). Use this data shown in the table.
Sample 1 2 3 4 5 Xbar R
1 1.55 1.58 1.64 1.67 1.50 1.588 0.17
2 1.52 1.62 ...

(Please see the attached file for the complete problem description).
Please help with the following calculations. Provide the answers in Excel.
Please show all of your work so that I can understand and continue with my assignment.
Thank you.

In a randomly controlled trial conducted with children suffering from croup, 46 randomly selected children were treated with ow humidity while another group of randomly selected children were treated with high humidity. Using a Wesley Croup test score, the low humidity group had a mean score of 0.98...

Conduct a test of hypothesis for the claim that a greater proportion of women agree wth this statement than men. Use a 0.05 level of significance.
a) Correctly state the hypotheses and label the claim
b) Draw a diagram correctly showing the sampling distribution
c) Calculate the test statistic
d...

A Pew research study recently randomly selected two groups of people, men and women and asked them if they agree with the following statement: "It s morally wrong for a married person to have an affair" Among 386 women, and 347 agreed with the statement. Among 359 men surveyed, 305 agreed with the s...

Doctors identify "chronic tension-type headaches" as headaches that occur almost daily for at least six months. Can antidepressant medications or stress management training reduce the number and severity of these headaches? Are both together more effective than either one alone? The research design ...

In manufacturing tablets, the quantity of active ingredient that is required to lie within 5 mg of the mean is normally distributed and the required condition is considered to hold if sigma < 1.6. A sample of 35 tablets has a sample standard deviation s = 1.321
(a) Find a 95% confidence interval fo...

Calculate Z scores for the dependent and independent variable values in the two hypotheses below. This will require calculating the standard deviation and converting the scores to Z scores.
Hypothesis: 1
(population per 100,000
ROBBERY ARRESTS ...

Please use information provide on step 1 and 2 to resolve steps 3, 4, 5.
3) Define Phase Based on the problems identified on step two I need a Project Scope Statement and a SIPOC.
4) Repeatability and Reproducibility System Report showing what data must you collect? Who will collect the dat...