Researchers routinely choose an alpha level of 0.05 for testing their hypotheses. What are some experiments for which you might want a lower alpha level (e.g., 0.01)? What are some situations in which you might accept a higher level (e.g., 0.1)?
BrainMass Solutions Available for Instant Download
For the use of a one-way ANOVA there must be more than two means that are being compared. As a result, the following research question is proposed: Does a six week or 12 week self-monitoring program provided to teens between the ages of 13 and 15 diagnosed with ADHD reduce anxiety levels when compared with no intervention? In
Hi Chris, The beginning question is asking "In your area of psychology." My area of psychology is Applied Behavioral Analyst or Behavioral Therapist or Clinical Psychology. This exercise trying to get one ready for research area involving psychological questions that may arise in one career into one the areas involving psycholo
How is hypothesis testing performed using t-tests? How do you write out Ho and Ha? What are the options for determining whether a hypothesis test result is significant? What are critical regions? How do you determine which t-test is most appropriate to use?
Using the attached dataset and hypothesis below, kindly assist with the following: 1. Run descriptive statistics and a t test on the emissions dataset attached. 2. Include an SPSS output file of the descriptive statistics analysis in a Word document, along with each of the following elements: a. The SPSS output, includin
How is hypothesis testing performed using t-tests? What are the options for determining whether a hypothesis test result is significant? What are critical regions for t-tests? How is SPSS used to perform an independent samples t-test? How are SPSS t-test results evaluated? How do you find the p-value in SPSS, and
Running a test to specifically explain your results could be answered by using a two-tailed hypothesis test. What happens, assuming that you reject the null hypothesis? (Please see attachment).
Considerable focus will be directed toward hypothesis testing methods, analysis, interpretation, and related SPSS application. In hypothesis testing is to create a testable research hypothesis. This hypothesis will be formalized and written as a null hypothesis (Ho) and an alternative or research hypothesis (Ha). Please see atta
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.
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
- 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
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
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
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
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
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
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
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
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
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.
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
______ 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
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
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
#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
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
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.
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
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
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