Data Anly Psychological Res
Data Anly Psychological Res PSY 295
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This 2 page Class Notes was uploaded by Newton Cormier on Saturday September 19, 2015. The Class Notes belongs to PSY 295 at Michigan State University taught by J. McAuley in Fall. Since its upload, it has received 53 views. For similar materials see /class/207559/psy-295-michigan-state-university in Psychlogy at Michigan State University.
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Date Created: 09/19/15
McAuley Final Exam Possible Multiple ChoiceConcept Questions 1 N W 1 U1 Ch X 14 Probability values are always a Greater than or equal to zero b Less than or equal to 1 c Positive numbers What term is used to identify the mean of the distribution of sample means a The expected value ofM Which combination of factors for sample size and standard deviation will produce the smallest value for the standard error a A large sample and a small standard deviation What would accurately describe a hypothesis test a An inferential technique that uses the data from a sample to draw inferences about a population What would correctly describe the effect ofincreasing the alpha level from 01 to 05 a It would increase the likelihood of rejecting the null and increase the risk ofa Type I error What combination of factors standard error and alpha level would increase the chances of rejecting the null a A small standard error and a large alpha level What would accurately describe the effect of increasing sample size a It would decrease the standard error and has no effect on the risk ofa Type I error When is there a risk of a Type II error a Whenever the decision is quotfail to reject the null A researcher administers a treatment to a sample ofparticipants selected from a population with a population mean of 80 If the researcher obtains a sample mean of 88 which combination offactors is most likely to result in rejecting the null hypothesis a Smaller standard deviation and alpha level of 05 as opposed to 01 TF As sample size increases the value of the standard error also increases a False TF Ifa specific sample leads to rejecting the null hypothesis with an alpha level of 05 then the same sample would also lead to rejecting the null hypothesis if the alpha level was changed to 01 a False TF A Type I error occurs when a treatment has no effect but the decision is to reject the null hypothesis a True TF You are more likely to make a Type I error with a sample ofn4 than with a sample of n100 even ifyou use an alpha level of 05 for both tests a False TF Alpha is the probability of committing a Type I error a True H U39l H Ch H l H X N O N H N N TF If all other factors are held constant increasing the sample size from n25 to n100 will increase the power of a statistical test a True What is the effect ofa large value for the estimated standard error a A smaller value for t and a lower likelihood of rejecting the null hypothesis Two samples from the same population both have n10 scores with M45 If the t statistic is computed for each sample then a The sample with the smaller variance will produce the larger t statistic As sample size increases a The value of df increases b The t distribution becomes more like a normal distribution c The critical values of t move closer to 0 On average what value is expected for the t statistic when the null hypothesis is true a 0 What set of characteristics sample size and variance will produce the smallest value for the estimated standard error a A large sample size and a small sample variance As sample variance increases what happens to the likelihood of rejecting the null hypothesis and what happens to measures of effect size such as rquot2 and Cohen s d a The likelihood decreases and measures of effect size decrease What would accurately describe an independentmeasures study a It uses different groups ofparticipants for each of the treatment conditions being compared In an independentmeasures hypothesis test what must be true if t0 a The two sample means must be equal What is required by the homogeneity ofvariance assumption a The two population variances are equal For what situation would a repeatedmeasures research design be appropriate a Comparing pain tolerance with and without acupuncture needles For an experiment comparing two treatment conditions an independentmeasures design would obtain scores for each subject and a repeatedmeasures design would obtain scores for each subject a I What is stated by the null hypothesis for an ANOVA a There are no differences between any of the population means On average what value is expected for the Fratio if the null hypothesis is true a 100 What would describe a typical distribution of Fratios a Positively skewed with all values greater than or equal to 0 What is the purpose ofa posthoc test a To determine which treatments are significantly different Under what circumstances are posttests necessary a When you reject the null hypothesis with more than 2 treatment conditions If sample size increases what happens to the shape ofa normal distribution a It becomes more quotnormalquot