For the following problems, you will: ⦁ Do all steps of hypothesis testing ⦁ Populations and hypotheses ⦁ Write out the steps you would do to calculate t ⦁ Choose the t-cutoff score ⦁ Calculate the t-statistic using the computer program SPSS ⦁ Write the t-statistic using proper APA format ⦁ Decide whether or not you would reject the null hypothesis ⦁ Interpret this result ⦁ Be sure to include a copy of the SPSS output in the word document ⦁ Single Sample T-test A researcher would like to study the effect of alcohol on reaction time. It is known that under regular circumstances the distribution of reaction times is normal with μ = 200. A sample of 10 subjects is obtained. Reaction time is measured for each individual after consumption of alcohol. Their reaction times were: 219, 221, 222, 222, 227, 228, 223, 230, 228, and 232. Use α = 0.05.

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Describe a study in which you can use both nonparametric and parametric statistics. A researcher has participants expecting to receive either painful or mild electrical shocks during a study wait in a quarter-full waiting room with other participants. He then measures whether they choose to sit next to other participants or if they sit far away on their own. What is the best test to run for this study and why?

Suppose an education administrator wants to know whether the test scores of a new standardized graduation exam are different for males and females. To test this hypothesis, the administrator decides to perform a ?‑test for two independent means. She takes a random sample of test scores from both male and female populations. Some of the summary data are shown in the table. Population PopulationDescription Samplesize Samplemean (pts) Sample standard deviation (pts) 1 Female ?1=21 ?⎯⎯⎯1=34.3 ?1=3.09 2 Male ?2=22 ?⎯⎯⎯2=34.7 ?2=3.82 The administrator assumes that the population variances are equal, so she computes a pooled ?‑test statistic. Determine the number of degrees of freedom, df, for the pooled ?‑statistic.

This question uses information from the previous question. At 5% significance level, carry out a test to investigate if employment sector makes any difference to the amount of paternity leave taken.You need to:   1. define new notation (if any),  2. briefly justify your testing procedure,  3. state the hypotheses,  4. calculate the test statistic and show steps of derivation,  5. use the p-value approach,  6. make a decision for the test and briefly explain.

Create a research hypothesis that would be answered using either a z- or a t- test. I was thinking of doing a study on college students and the amount of articles they read in one year. Include the following: Introduction: Brief description of the study including the purpose and importance of the research question being asked. What is the null hypothesis? What is the research hypothesis? Participants/Sampling Method: Describe your sampling method. What is your sample size? Who is your population of interest? How representative is the sample of the population under study? Data Analysis: Describe the statistical analysis. What is your variable? What is its level of measurement? What is your alpha level? Results & Discussion: Did you reject the null hypothesis? What information did you use to lead you to your conclusion? Was your p value greater than or less than your alpha? NOTE: You can just make up numbers, but include your made-up p value