Ap Stats Cheat Study Guide 2024.

AP STATS CHEAT STUDY GUIDE 2024. A candy company produces individually wrapped candies. The quality control manager for the company believes that the weight of the candies is approximately normally distributed with mean 720 milligrams (mg). If the manager's belief is correct, which of the following intervals of weights will contain the largest proportion of the candies in the distribution of weights? (A) 740 mg to 780 mg (B) 700 mg to 740 mg (C) 680 mg to 720 mg (D) 660 mg to 700 mg (E) 620 mg to 660 mg - CORRECT ANSWER 700 mg to 740 mg A blind taste test will be conducted with 9 volunteers to determine whether people can taste a difference between bottled water and tap water. Each participant will taste the water from two different glasses and then identify which glass he or she thinks contains the tap water. Assuming that people cannot taste a difference between bottled water and tap water, what is the probability that at least 8 of the 9 participants will correctly identify the tap water? (A)0.0020 (B)0.0195 (C)0.8889 (D)0.9805 (E)0.9980 - CORRECT ANSWER 0.0195 A box contains 10 tags, numbered 1 through 10, with a different number on each tag. A second box contains 8 tags, numbered 20 through 27, with a different number on each tag. One tag is drawn at random from each box. What is the expected value of the sum of the numbers on the two selected tags? (A)13.5 (B)14.5 (C)15.0 (D)27.0 (E)29.0 - CORRECT ANSWER 29.0 A carnival game allows the player a choice of simultaneously rolling two, four, six, eight, or ten fair dice. Each die has six faces numbered 1 through 6, respectively. After the player rolls the dice, the numbers that appear on the faces that land up are recorded. The player wins if the greatest number recorded is a 1 or 2. How many dice should the player choose to roll to maximize the chance of winning? (A)two (B)four (C)six (D)eight (E)ten - CORRECT ANSWER two A compact disc (CD) manufacturer wanted to determine which of the two different cover dish s for a newly released CD will generate more sales. The manufacturer chose 70 stores to sell the CD. Thirty-five of these stores were randomly assigned to sell CD's with one of the cover designs and the other 35 were assigned to sell the CDs with the other cover design. The manufacturer recorded the number of CDs sold at each of the stores and found a significant difference between the mean number number of CDs sold for the two cover designs. Which of the following gives the conclusion that should be made based on the results and provides the best explanation for the conclusion? A. It is not reasonable to conclude that the difference in sales was caused by the different cover designs because this was not an experiment B. It is not reasonable to conclude that the difference in sales was caused by the different cover designs beca - CORRECT ANSWER It is reasonable to conclude that the difference in sales was caused by the different cover designs because the cover designs were randomly assigned to stores