4) What is the degree of freedom? * A. 2 B. 1 C. 3   5) What is the test statistics? * A. Chi-square test (Test of Independence) B. Chi-square test (Test of Goodness of Fit) C. Chi-square test (Test of Homogeneity)   6) What is the expected frequency for Male/Not Favor? * A. 126.77 B. 135.23 C. 34.77

Jamaica Auto Service is a popular place for car service. It is also known that the mean time taken for Oervice at this station is 15 minutes per car and the standard deviation is 2.5 minutes. It is also known that the time taken for service on a car follows a normal distribution. a) What is the probability that a randomly selected customer will have to wait at most 14 minutes for service? (round to four decimal places) b) What percentage of customers will have to wait between 12 and 18 minutes for their service? (round to nearest percentage) c) Is it likely that it may take longer than 23 minutes for service? Find the likelihood of happening this and justify your answer.

Using theoretical probabilty of randomly selecting option 6,7, or 8 for the first bar?  Theoretical probability is 1/11

7  PLEASE ANSWER

In sample standard deviation,(n - 1) is called degree of freedom, why?

3. Which statistical property make odds ratios the ideal measurement for case-control studies?A) Its insensitivity to confounding factorsB) Its insensitivity to varianceC) Its insensitivity to sampling errorD) Its insensitivity to bias

12). What is a percentile? In probability notation, how would you find the 85th percentile?