The following table shows site type and type of pottery for a random sample of 628 sherds at an archaeological location. Pottery Type Site Type Mesa Verde McElmo Mancos Row Total Black-on-White Black-on-White Black-on-White Mesa Top 79 57 53 189 Cliff-Talus Canyon Bench 82 69 62 213 93 68 65 226 Column Total 254 194 180 628 Use a chi-square test to determine if site type and pottery type are independent at the 0.01 level of significance.

You intend to conduct a goodness-of-fit test for a multinomial distribution with 3 categories. You collect data from 77 subjects. What are the degrees of freedom for the x? distribution for this test? d.f. =

estion Help In a psychology journal, researchers reported that a chief executive officer's facial structure can be used to predict a firm's financial performance. The study involved measuring the facial width-to-height ratio (WHR) for each in a sample of 51 CEOS at publicly traded Fortune 500 firms. These WHR values (determined by computer analyzing a photo of the CEO's face) had a mean of x = 1.81 and a standard deviation of s = 0.12. Use this information to complete parts a and b below. a. Find and interpret a 90% confidence interval for u, the mean facial WHR for all CEOS at publicly traded Fortune 500 firms. (Round to three decimal places as needed.) O A. The 90% confidence interval for mean facial WHR indicates that the true mean facial WHR for the CEOS in the sample is between and with 90% confidence. O B. The 90% confidence interval for mean facial WHR indicates that 90% of all CEOS at publicly traded Fortune 500 firms have a WHR between and O C. The 90% confidence interval for…

Stress at work: In a poll about work, 41% of respondents said that their jobs were sometimes or always stressful. Thirteen workers are chosen at random. Part 1 of 2 (a) What is the mean number who find their jobs stressful in a sample of 13 workers? Round the answer to two decimal places. The mean number who find their jobs stressful is Part 2 of 2 (b) What is the standard deviation of the number who find their jobs stressful in a sample of 13 workers? Round the answer to four decimal places. The standard deviation of the number who find their jobs stressful is

You intend to conduct a goodness-of-fit test for a multinomial distribution with 3 categories. You collect data from 78 subjects. What are the degrees of freedom for the x? distribution for this test? d.f. =

We would like to investigate if there is a difference in mean coffee consumption frequency between students at Rutgers, Princeton, and the University of Michigan. What test would we likely conduct? Independent samples t-test One Sample z-test Paired samples t-test One Way ANOVA

You want to compare differences in prior arrests across ethnicity in your study, you measured ethnicity as white =0 black =1 hispanic=2, and other =3. Prior arrests was recorded as the number of prior arrests. which test would you perform to see if arrests differ across diffrent ethnic categories? A. ANOVA B. T-test

Consider the following data: −10, −10, 0, 3, −10, 3, 3  Step 1 of 3: Calculate the value of the sample Variance. Round your answer to one decimal place. Step 2 of 3: Calculate the value of the sample deviation. Round your answer to one decimal place. Step 3 of 3: Calculate the value of the range.

Complete the table. Observed Expected Frequency Frequency Residual Squared Category A 25 21 36 20 What is the chi-square test-statistic for this data? B

1.Statistical Literacy  Consider the mode, median, and mean. Which average represents the middle value of a data distribution? Which average represents the most frequent value of a distribution? Which average takes all the specific valuesinto account?