Question

Open the "Lab Dataset" (HSCI390.sav) you have been using for lab assignments in SPSS. Your analysis will focus on the variables "Gender" (Gender) and "Blood Alcohol Content at last drinking episode" (BAC).

х *Output2 [Document2) - IBM SPSS Statistics Viewer File Edit View Data Transform Insert Format Analyze Analyze Graphs Utilities Extensions 12 Window Help utput BLES=BAC Log ERIA=CI.95). E T-Test Title Notes - Active Dataset - Group Statistics Independent Samples Test 1) l\client cs\Users\sonch\Documents\HSCI390.sav Group Statistics Gender N Mean Std. Deviation bhol Content at ng episode Std. Error Mean .00119 .00181 female male 2537 985 .0347 0326 .05981 .05690 Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means Std. Error Difference F Sig t df Mean Difference .00204 Sig. (2-tailed) 357 95% Confidence interval of the Difference Lower Upper -00230 .00639 .675 411 922 3520 .00222 bhol Content at Ing episode Equal variances assumed Equal variances not assumed 942 1875.253 .346 .00204 .00217 -00221 .00629 IBM SPSS Statistics Processor is ready Unicode:ON H208, W: 1139 pt 5:19 PM 7/30/2020 H e

Researchers are interested in examining if the mean Blood Alcohol Content at last drinking episode differs between men and women. To examine their research question of interest, they will use data from the sample of CSUN students contained in the HSCI390.sav dataset.

Using SPSS for the analysis, you will test whether there appears to be a difference in the population mean Blood Alcohol Content at last drinking episode of men compared with population mean of women, using an alpha level (α) of 0.05.

You will use the information above for questions A-G below.

A. Which of the following represents the appropriate null hypothesis (H0), given this research question of interest?

Answer Choices: H0: μ1 - μ2 ≠ 0, H0: μ1 - μ2 = 5, H0: μ1 - μ2 = 0.0347, H0: μ1 - μ2 = 0.0326, H0: μ1 - μ2 = 0

B. What is the degrees of freedom (df) associated with your test? Answer Choices: 55, 100, 3520, 4201, 5921

C. Which of the following represents the appropriate decision rule and critical values, testing at an alpha level (α) of 0.05.

Answer Choices: We will reject the null hypothesis (alpha = 0.05) if the calculated test statistic is more extreme than the critical values of -3.002 and 3.002.

We will reject the null hypothesis (alpha = 0.05) if the calculated test statistic is more extreme than the critical values of -2.576 and 2.576.

We will reject the null hypothesis (alpha = 0.05) if the calculated test statistic is more extreme than the critical values of -1.913 and 1.913.

We will reject the null hypothesis (alpha = 0.05) if the calculated test statistic is more extreme than the critical values of -3.239 and 3.239.

We will reject the null hypothesis (alpha = 0.05) if the calculated test statistic is more extreme than the critical values of -1.960 and 1.960.

D. What is the t-statistic associated with your test? (rounded to the nearest thousandth) Answer Choices: 0.411, 0.003, 0.357, 0.00204, 0.922

E. What is the p-value associated with your test? (rounded to the nearest thousandth) Answer Choices: 0.357, <0.05, 0.922, 0.003, 0.411

F. Given your test results, what is your decision about the null hypothesis? Answer Choices: Reject the null hypothesis, fail to reject (i.e., retain) the null hypothesis

G. Interpret your decision about the null hypothesis from the previous question.

Answer Choices: Based on our study, we HAVE enough evidence to conclude that there appears to be a difference in the population mean Blood Alcohol Content... Based on our study, we DO NOT HAVE enough evidence to conclude that there appears to be a difference in the population mean Blood Alcohol

Content...

Answer 1

A) The appropriate null hypothesis (HO): Answer: Ho: ul - Į12 = 0 B) The degrees of freedom (df) associated with test is: Answer: 3520 C) The appropriate decision rule and critical values: Answer: We will reject the null hypothesis (alpha = 0.05) if the calculated test statistic is more extreme than the critical values of -1.960 and 1.960. D) The t-statistic associated with test is: Answer: 0.922 E) The p-value associated with test is: Answer: 0.357 F) The decision about the null hypothesis is: Answer: fail to reject (i.e., retain) the null hypothesis G. Interpretation of decision about the null hypothesis is: Answer: Based on our study, we DO NOT HAVE enough evidence to conclude that there appears to be a difference in the population means Blood Alcohol Content.