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Hypothesis Testing

Sample Size, Sample Error, and Sum of Squares

On average, what value is expected for the t statistic when the null hypothesis is true? *1 *1.96 *0 (?) *t>1.96 What is the sample variance and the estimated standard error for a sample of n=9 scores with SS= 72? *s2=3 and sM=3 *s2 and sM= 1 *s2=9 and sM=3 (?) *s2=3 and sM=1 Which set of characteristics will produ

T-test for a Sample Height

From literature research, a physiologist learns that the national average height for male college students is 70 inches. Twenty randomly-chosen male students at AWC had the following heights: 68, 71, 73, 66, 65, 68, 58, 63, 77, 57, 69, 63, 64, 59, 74, 72, 70, 64, 56, 72 At α = 0.05, do male college students at AWC

Independent Sample Testing of Hypothesis

please help me solve this in simple steps. thank you. A researcher conducts an independent-measures study comparing two treatments and reports the t statistics as t(25)= 2.071. How many individuals participated in the entire study? use a two tailed test with o=.05 and the distributions tool below to determine if there is s

Computing Pooled Variance and Standard Error for 2 Sample Means

Two separate samples, each with n=15 individuals, receive different treatments. After treatment, the first sample has SS=1740 and the second has SS=1620. The pooled variances for the two samples is _________. Compute the estimated standard error for the sample mean difference. Estimated s(M1-M2)=________ If the sample mean

Computing Standard Error and Explaining T and Z Distribution

Can you please help me with these questions? Some I have attempted to answer. Please let me know if they are right or wrong. Find the estimated standard error for the sample mean for each of the following samples. (Use one decimal place) n=4 with SS = 48 _______ n=6 with SS= 270 _________ n= 12 with SS= 132 _____

Six basic statistics questions regrading hypothesis testing

A two tailed hypothesis test is being uses to evaluate a treatment effect with o= .05. if the sample data produce a z- score of z= -2.24 what is the correct decision? * reject the null hypothesis and conclude that the treatment has an effect * fail to reject the null hypothesis and conclude that the treatment has no effect

Type I and II error

Can you please let me know if I answered these word questions correctly. My book isn't exactly to the point. i understand if you can't. Thank you You complete a hypothesis test using o=.05 and based on the evidence from the sample, your decision is to reject the null hypothesis. which of the following is true? * you have m

Explaining 6 Basic Statistics Questions on Hypothesis Testing

I am just wanting someone to see if answered these word questions correctly. My book isn't exactly to the direct point. I understand if your unable to. Which of the following accurately describes the critical region? * outcomes with a high probability if the null hypothesis is true * outcomes with very low probability if t

Hypothesis Test with Cohen's d

In a study examining the effects of alcohol on reaction time it was found that even moderate alcohol consumption significantly slowed the response time to an emergency situation in a driving simulation. In a similar study researchers measured reaction times 30 minutes after each participant consumed 6 ounces of wine. Again they

Hypothesis Testing Method

1. Let take for example that research in your area was providing behavior therapy with people who have neurological problems: Imagine that you are in charge of a research Assignment, and can choose to do research on anything. a). What research question would you create? b). Write out your research question and explain an

Run a two-way ANOVA in SPSS

I need help with someone who can run a Two-Way ANOVA using SPSS software and include appropriate results only based on the information provided in the attachments. Please explain and evaluate the SPSS results. Please see attachments I up loaded all the data needed to perform an SPSS two-way ANOVA. Research Question for

Statistics project based on hypothesis testing

Your Project should be complete and contain sections entitled: Hypotheses: this section should contain the hypothesis or hypotheses that you tested.This section should be 1 to 2 pages in length. Research Design: this section should clearly define the independent variable(s), the levels of such, and the dependent variable(

SPSS: One way and Two way ANOVA

Please see attachments for full problem description 1. Compare the different Ethnicities of students in the Stat_Grades.sav class to determine if there is a statistically significant difference in the average Final Examination points between the different ethnicities. Be sure to state the hypothesis, state Ho and Ha, includ

One-Way & Factorial ANOVA using SPSS

Whenever there are two independent variables and each independent variable has multiple groups, the most appropriate statistical test to use to compare these means and interactions is the two-way (factorial) ANOVA. Please see attachments:

Choosing value of alpha levels

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)?

Null and alternative hypothesis for testing means of three groups

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

One ANOVA Testing

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 do you perform a t-test?

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?

Statistical Analysis of Population and C02 per Capita Emission

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

Explanations of SPSS, T-tests, Hypothesis Tests and Statistical Power

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

Inferential Research Question: Home Price

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

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