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Hypothesis Testing

Hypothesis Testing - 3 hypothesis

I am having trouble defining the 3 hypothesis' which is the very first step of this case. I realize that I would be using t-distribution for the first hypothesis, but I'm not sure where to go and I believe it is because I don't follow the way the assignment is worded.

Two way Analysis of variance

I want to see two methods are the significantly same or not. Each methods has 5 variables are inside. so I would like to see each 5 variables from methods A and B are significantly the same and overall the two methods are significantly same or not. Could you set up the statistically methods(experimental design) (Null hypothesis

Research and statistical information

- A tissue manufacturer that has the fourth-largest market share plans to experiment with a 50 cents-off coupon during November and a "buy one, get one free" coupon during December. The experiment will take place at Target stores in St. Louis and Kansas City. Sales will be recorded by scanners from which mean tissue sales for ea

Hypothesis Testing, Confidence Interval for Mean and Proportion

See the attached file. 1- A snack food company produces bags of peanuts labeled as containing 4 ounces. A consumer reports organization wants to see if the weight is actually less than 4 ounces. They randomly choose 40 bags and their contents are weighed. They find the average weight is 3.5 ounces with a standard deviation

Z Test and ANOVA

1. An Ivy League college is concerned that out of state students may be receiving lower grades than the state residents students. Two independent random samples have been selected: 165 observations from population 1 (Out of state students) and 177 from population 2 (State students). The sample means obtained are X1(bar)=86 and X

Performing a 5-step hypothesis testing

Do students at various universities differ in how sociable they are? Twenty-five students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with other students. The result for University X was a mean of 5 hours and an estimated popula

Conducting a 5-Step Hypothesis Testing

Twenty students randomly assigned to an experimental group receive an instructional program; 30 in a control group do not. After 6 months, both groups are tested on their knowledge. The experimental group has a mean of 38 on the test (with an estimated population standard deviation of 3); the control group has a mean of 35 (with

Rocky University: How prevalent is Cheating?

Note: The attached Excel file provides the data required for this question. During the global recession of 2008 and 2009, there were many accusations of unethical behavior by Wall Street executives, financial managers, and other corporate officers. At that time, an article appeared that suggested that part of the reason for

Hypothesis Testing and its Interpretation

A company has been using the same advertising strategy for a number of years and over that time has had relatively constant monthly sales. The mean of these sales is £1.3m. 12 months ago it changed its strategy and over these 12 months the monthly sales have been £1.45m with a standard deviation of £0.3m. It now wants to test

Example of one sample t-test

A share tipping service claims that its selections give an average return of 10% if held for 12 months. An investor wants to investigate this claim and records the returns of the last 20 shares that have met the 12 month period. The sample mean return is 9% and the standard deviation is 2.5%. You can assume that the return from

Steps on conducting hypothesis testing

An internet company has redesigned its website to improve the online experience of its customers. To test whether the new design has improved its customers' experience it has asked people to comment on whether they prefer the new format or not. 180 people have passed comment and of those 102 people preferred the new design i

Hypothesis testing for means - t scores

I don't understand the formulas and rationales for the attached. I also don't have the correct version of excel to use the tool pack I need so I am doing everything manually. I am doing the work on my own but want to make sure it is somewhat correct prior to turning in. Any help would be appreciated. Thank you.

Death Penalty as Moral Acceptance

In 2010, 65% of adult Americans thought that the death penalty was morally acceptable. In a poll conducted by the Gallup Organization, a simple random sample of 1005 adult Americans resulted in 704 respondents stating that they believe the death penalty was morally acceptable when asked, "Do you believe the death penalty is mora

Solving various questions on hypothesis testing

______ 1. The variable about which the investigator wishes to make predictions or estimates is called the ____. a. dependent variable b. unit of association c. independent variable d. discrete variable ______ 2. In regression analysis, the quantity that g

T-test hypothesis

We have been working with one-sided and two-sided t tests but I do not know how to do this problem: The observed time that 20 individuals spend standing and walking per day is reported in the following table: Group n Mean Std. dev Group 1 (lean) 10 525.751

Calculating the cramer's and lambda using chi-square

Construct a cross tabulation to examine the relationships between the two nominal/ordinal level variables. Assume that you selected a random sample of two hundreds cases and collected data on these cases. Calculate Chi Square ans as appropriate, Lambda, gamma and Cramer's V. Briefly state conclusion about hypothesis relationship

Running and Interpreting Linear Regression

#1 - Using your workplace, present or prior, or an organization with which you are affiliated, identify a dependent variable and an independent variable of interest to you; gather a small data set for each of the variables; enter the data into Minitab; run the simple linear regression in Minitab, and interpret the regression out

Cross tabulation and analyzing relationships among variables

Do women and men have different opinions about affirmative action? Based on a sub sample of 2008 GSS, the output figure below shows respondent's sex (sex) and attitudes toward affirmative action (DISCAFF: Are whites hurt by affirmative action). Whites hurt by Affirmative action* respo

Application of hypothesis testing on gender discrimination

Using your workplace, present or prior, or an organization with which you are affiliated, identify a quantitative and a qualitative variable of interest to you. Set up the hypotheses for the population mean and/or proportion for the variables you have selected, run the hypothesis test, and interpret your output.

Analysis of Liberals & Conservatives with Hypothesis Test

From the 2008 GSS-the average educational attainment for liberals is 13.90 year Sy=3.27) and the average educational attainment for conservatives is 13.55 years (Sy=2.82). Data are base on 187 liberals and 227 conservatives responses. a. Test research hypotheses that there is a difference in level of education between liberals

Discussing a Paired T-Test for Two Depenedent Samples

Write ideas for a hypothesis that you might test to compare two or more samples in your example. Indicate which hypothesis test you would use and the samples you would select. To support your choice of test include a brief discussion of the level of measurement, the number of samples involved, and whether the samples are related

Statistical Analysis of Case of Baseball

Suppose a well-known baseball player states that, at this stage of his career, he is a "300 hitter" or better. That is, he claims that he gets a hit in at least 30% of his at-bats. Over the next month of the baseball season, this player has 105 at-bats and gets 33 hits. a. Identify the null and alternative hypotheses from the

Defining the hypothesis tests

1) a) Which variable in an experiment determines whether to use parametric or nonparametric procedures? b) In terms of the dependent variable, what are the two categories into which all nonparametric procedures can be grouped? 2) a) Why, if possible, should we design a study that meets the assumptions of a parametric proc

Calculating predictive values of positive tests

Please give details to solve the following question: Calculate the value based on this information. A new screening test for Lyme disease is developed for use in the general population. The sensitivity (ability to identify infected persons) is 60% and specificity (ability to identify non- infected persons) is 70%. 300 people

Hypothesis Testing and Population Analysis

I would like the response to the questions below in excel format, so that I can see the formulas used. 1. In a recent year, the FCC reported that the mean wait for repairs for AT&T customers was 25.3 hours. In an effort to improve this service, suppose that a new repair service process was developed. This new process when use

The solution gives detailed steps on performing a hypothesis testing (5 step procedure). All the formula and calcuations are shown and explained. An excel output is also included.

A consumer magazine randomly selected 100 new hybrid car dealers from across the country, and created a list of retail prices. They want to know if the price differs from $25,000. RQ: Is the average hybrid car dealer retail price different than $25,000 with a 95% confidence level? Use Alpha = .05 A. Choose the Hypothesis H1:

Six Sigma Tools for Testing Statistical Significance

"Suppose you want to know if a new design of a product is actually better than the current product. For example, your design team is working on increasing the speed of the KX Speed Drill. You have produced a small batch of the new design, the KX2, and you want to know if this speed is faster than the current speed of 17.5 revs p

Designing a Hypothesis Test

How do you design a test pilot and what would it look like once finished? The situation I have involves a local clinical practice for individuals who show signs of depression. The doctor has noticed that some of her clients do better when they participate in group interventions, and others make more progress when she sees them

Testing the Null Hypothesis and Interpreting the P-Value

Southside Hospital in Bay Shore, New York, commonly conducts stress tests to study the heart muscle after a person has a heart attack. Members of the diagnostic imaging department conducted a quality improvement project with the objective of reducing the turnaround time for stress tests. Turnaround time is defined as the ti