Question 6Your answer is CORRECT.The following table displays the results of a sample of 100 in which the subjects indicated their favoriteice cream of three listed. The data are organized by favorite ice cream and age group. What is theprobability that a person chosen at random will be under 20 years old if he or she favors chocolate?Age Chocolate Vanilla Strawberry Over 40 12 5 13 1 19 14 19 10 19 8 19
8/17/15, 6:58 PM Print Test Page 4 of 10 20-40 12 9 14 Under 20 13 18 4 a) b) c) d) e) Question 7Your answer is CORRECT.Identify the most appropriate test to use for the following situation:A private and a public university are located in the same city. For the private university, 1046 alumni weresurveyed and 653 said that they attended at least one class reunion. For the public university, 791 out of1327 sampled alumni claimed they have attended at least one class reunion. Is the difference in thesample proportions statistically significant? Question 8 24 37 13 37 13 100 13 30 87 100
8/17/15, 6:58 PM Print Test Page 5 of 10 Your answer is CORRECT. A random sample of 169 cans of fruit nectar is drawn from among all cans produced in a run. Priorexperience has shown that the distribution of the contents has a mean of 11.22 ounces and a standarddeviation of 2.14 ounce. What is the probability that the mean contents of the 169 sample cans is less than10.99 ounces? Question 9Your answer is CORRECT.Find a value of so that A 97% confidence interval for the mean of a population is to be constructed and must be accurate towithin 0.3 unit. A preliminary sample standard deviation is 1.4. The smallest sample size n that providesthe desired accuracy is . a) b) c) d) e) Question 10 Your answer is CORRECT. a) b) c P ( Z ≤ c ) = 0.57 0.824 − 0.176 0.176 0.676 1.176 109 103
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