#### Nicotine confidence interval estimates

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...

#### Spearman rank correlation coefficient by Messina

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...

#### Regression Models

 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...

#### T-Test - Applied Statistics for Psychology

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). ...

#### EconomicSTATS and Forecast Function

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 ...

#### Financial Advisement: Regaining Stocks

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 ...

#### Air Force Training Program

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...

#### Sampling Distribution and Population Distribution

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,...

#### Probability distributions - normal distribution

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...

#### Computing Cumulative Function, Mean, and Variance

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...

#### Z scores for a math and spanish exam

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...

#### Z-Scores and Extreme Scores

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=...

#### Statistics: Moment Generating Function

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

#### spss

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...

#### Normally Distribututed Data

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...

#### Finding Mean and Standard Deviation for PDF Function

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 ...

#### Maximum Likelihood Estimator

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?

#### need assistance to figure this out

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 ...

#### Wind Turbine Power Calculations

(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.

#### Two Sample T-Test for Equal Means of Two Groups

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...

#### Test for Proportions

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...

#### confidence interval for the proportion difference

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...

#### Random Sampling - statistics

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 ...

#### Six Sigma Project

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...