Helen, a lab technician, randomly assigns 15 rats to receive a high protein diet and 11 rats to receive a low protein diet as part of a nutrition study. After three months, she uses a two-sample t-test at a significance level of a = 0.05 to compare the mean weight gain, in grams (g), of the rats in each group. Because the standard deviations in weight gain differ considerab across the two samples, Helen does not assume the population standard deviations are equal. Some of the results of the test are shown in the table, where N is the sample size, Mean is the sample mean, StDev is the sample standard deviation, T-Value is the t-statistic, and DF is the approximate degrees of freedom used in the test. Descriptive Statistics: Weight Gain by Diet Diet N Mean StDev High protein 15 65 g 20 g Low protein 11 60g 7 g Test T-Value DF P-value 0.8963 18 Use software to find the p-value that corresponds to the t-statistic shown in the table. Report your answer to at least thre decimal places. p-value .005 %3D

DIRECTIONS: Round all answers to the nearest thousandth. Two new drugs are being compared for effectiveness in lowering total cholesterol levels. On the sample of 15 subjects, drug A is found to lower total cholesterol by an average of 75 mg/dl with SS = 2025. On the sample of 10 subjects, drug B lowered the mean cholesterol level by 78 mg/dl with SS = 2005. Use a 0.01 level of significance to test the claim that the two drugs are equally effective assuming populations are normally distributed. ( Use equal variance t procedure called pooled variance t procedure)

DIRECTIONS: Round all answers to the nearest thousandth. Two new drugs are being compared for effectiveness in lowering total cholesterol levels. On the sample of 15 subjects, drug A is found to lower total cholesterol by an average of 75 mg/dl with SS = 2025. On the sample of 10 subjects, drug B lowered the mean cholesterol level by 78 mg/dl with SS = 2005. Use a 0.01 level of significance to test the claim that the two drugs are equally effective assuming populations are normally distributed. ( Use equal variance t procedure called pooled variance t procedure)

In a study to investigate the extent to which individuals are aware of industrial odors in a certain regiont, a sample of individuals was obtained from each of three different areas near industrial facilities. Each individual was asked whether he or she noticed odors (1) every day, (2) at least once/week, (3) at least once/month, (4) less often than once/month, or (5) not at all, resulting in the data and SPSS output below. SPSS output Crosstabulation: AREA BY CATEGORY Count Val Exp CATEGORY → Row Pct Row AREA Col Pct 1.00 2.00 3.00 4.00 5.00 Total 1.00 20 28 23 14 12 97 12.7 24.7 18.0 16.0 25.7 33.38 20.6% 28.9% 23.78 14.48 12.4% 52.6% 37.8% 42.6% 29.28 15.6% 2.00 14 34 21 14 12 95 12.4 24.2 17.6 15.7 25.1 32.6% 14.78 35.88 22.1% 14.78 12.6% 36.88 45.9% 38.9% 29.28 15.6% 3.00 4 12 10 20 53 99 12.9 25.2 18.4 16.3 26.2 34.0% 4.08 12.1% 10.18 20.2% 53.5% 10.5% 16.2% 18.5% 41.78 68.88 Column 38 74 54 48 77 291 Total 13.18 25.4% 18.6% 16.5% 26.5% 100.0% Chi-Square D.F. Significance Min…

Using the boxplot, find the following. 200 220 240 260 280 300 Part: 0/ 2 Part 1 of 2 Identify the maximum value, minimum value, median, first quartile, and third quartile. Maximum value = Minimum value = Median = First quartile = Third quartile %3D

Compute the P-value. Round the answer to four decimal places. P-value = X S

Your p value is .03 and you chose your α level to be .05. What kind of error could you be making?   a. Type I error   b. Type II error   c. Type I and Type II error   d. Neither errors

a researcher wants to determine the average amount of minutes it takes for the medicine to reduce the pain for adult males. The researcher contacted 107 subjects to participate in the study, n=but only got results from 79 of the subjects. The average time it took for the medicine to reduce headache pain of these subjects was 27 minutes. What is the population? What is the sample? What tis the parameter? What is the symbol for this parameter? What is the statistics? What is the symbol for this statistics?

Sunnose you drive from Here to There at a speed of 30 miles/hour and then drive back from There to Here at 60 miles/hour. What is your average speed?

These values have an average of 8. What is the average distance of those values from that average of 8? 0 2 6 14 18