Statistics week 2,3,4 Q&A

1. Question : The table value z = .70 is .2580. The z = .70 value occurs at what equivalent percentile? Student Answer: 24.20 % 25.80 % 30 % 75.80 % Instructor Found in section 3.3, Working from Percentages Back to z Scores. Explanation: Points Received: 0 of 1 Comments: Question 2 Question : . Rejecting the null hypothesis is the same as saying _____________. Student Answer: any differences are random differences the result is statistically significant the hypothesis of difference is rejected the research hypothesis is rejected Instructor Found in section 5.3, Hypothesis Testing. Explanation: Points Received: 1 of 1 Comments: Question 3 Question : . If the z transformation is used with population data, M is replaced by what symbol? Student  Answer:  z X Instructor Found in section 3.2, The Standard Normal Distribution. Explanation: Points Received: 0 of 1 Comments: Question 4 Question : . How does the standard normal distribution differs from other normal distributions? Student Answer: It has a mean value fixed at 0. It is always symmetrical. It is mesokurtic. It has a mean value of 1.0. Instructor Found in section 3.2, The Standard Normal Distribution. Explanation: Points Received: 1 of 1 Comments: Question 5 Question : . A one-sample t value is statistically significant in which situation? Student Answer: The calculated t is equal to or larger than the table value. The calculated t is equal to or smaller than the table value. The calculated t is equal to or smaller than .05. The calculated t is equal to or larger than .05. Instructor Found in section 5.2, The One-Sample t-Test. Explanation: Points Received: 0 of 1