Greetings, tutors. I took my final test in Stats, and I'd really like to know if my answers are correct. Would you be able to help me with this? Even though I've already taken the test, I want to make sure I'm 100% certain. I appreciate your help. ---------- 1. The f distribution is: a. symmetrical

b. positively skewed

c. used for two samples

d. negatively skewed 2. A product is deemed to be good. The conclusion is to reject the null hypothesis. This is an example of _______ a. false negative

b. false positive

c. type I error

d. type II error

e. b and c

3. Which of the following is not true about the correlation coefficient a. it is known as "r"

b. invented by Karl Pearson

c. It is the product moment correlation coefficient

d. it has no units

e. it proves causality 4. A sample has a size of 350. What is the value of the denominator when computing the variance? a. 315

b. 350

c. 349

d. 348

e. 347 5. In a normal distribution, what is the probability of finding an observation between +-1.96 standard errors? a. 98%

b. 95%

c. 92%

d. 68%

e. none of the above 6. In a normal distribution, what is the probability of finding an observation within +-1.5? a. 88.6%

b. 75%

c. 72%

d. 70%

e. None of the above 7. Which of the descriptive statistical tools is ideal for the nominal scale? a. Mean

b. variance

c. Median

d. Standard deviation

e. Mode 8.

A manager is concerned about absenteeism in her department. She wants to know if absenteeism is equally distributed amongst the four weeks of the month. Using the sample data below and using a 0.05 level of significance what would you tell this manager? Week Observation Expectation 16 24 28 32 100 Paragraph V BIUVA EV EV 6 + v . . . ENG O ESQuestion Zo ( point Listen The probability of making a Type I error is generally denoted by Oa Type I error only exists on week daysQuestion 29 (1 point) 19 Listen The value of the Cova ( x -D) (-)) 8 11 C riance is? 30 SO e 2: 12 13 O- Oo 15 14 4Question 30 (1 point) i Listen The following table presents the results of an ANOVA from an experiment comparing four groups with samples of n = 10 in each group. Complete the missing values in the table. What conclusion would you make regarding the null hypothesis? SS Degrees of Freedom MS F Between 15 Within 108 Total Paragraph BI UVA VQuestion 32 (3 points) Listen Z -1.96 O 2.58 13 In a normal distribution, what is the area under the curve? 16