Emery Adams

Questions

• Is #""_12C_9# greater than or less than #""_12C_7#?
• An amusement park has 13 roller coasters. In how many ways can you choose 4 of the roller coasters to ride during your visit to the park?
• What is the mode, median, and mean of 3, 12, 11, 7, 5, 5, 6, 4, 10?
• Scores on a statistics final in a large class were normally distributed with a mean of 75 and standard deviation of 6. What is the 40th percentile of the scores?
• If you tossed a coin 10 times, what is the probability of landing on tails every time?
• One ball is drawn at random from a bag containing 5 red balls and 6 white balls. What is the probability that ball is red or white?
• A study of one thousand teens found that the number of hours they spend on social networking sites each week normally distributed with a mean of 15 hours. The population standard deviation is 2 hours. What is the 95% confidence interval for the mean?
• Given the data points (12, -5), (0, 3), (9, -2), (6, 0), and (1, 1), how would you describe the correlation of the data?
• Set A has elements 1, 2. Set B has elements a, b, c, d. We're interested in making subsets from the product of A x B that have at least 3 elements. How many subsets can be made?
• 4 distinguishable chess pieces are to be placed on a chessboard such that no piece lies on a vertical or horizontal line with any other piece. In how many ways can the 4 pieces be placed?
• If mean profits of an SME (small or medium enterprise) is #£46,000# and standard deviation is #£19,000#, what is the probability that a specific SME has profit between #£44,000# and #£48,000#?
• What is one way the internet can help me study statistics?
• Sarah has two skirts and three tops in her suitcase. One of the skirts is blue; the other is red. The tops are red, blue and white. She randomly removes one skirt and one top from the suitcase. What are all the possible combinations?
• You roll a number cube. What are the odds of rolling a 6? What are the odds of rolling a 5 or higher?
• Five pizzas are ordered and are to be placed in a line on a table. In how many ways can the pizzas be ordered?
• How many even numbers less than 500 can be formed using the digits 1,2,3,4,5? Each digit can only be used once.
• Bill and two other people play a game where the first to roll an even number using a standard number cube wins. What's the probability that Bill, by going first, wins?
• Are the outcomes of a dice roll an example of a discrete or a continuous variable?
• A committee of 5 is to be selected from a group of 6 men and 9 women. If the selection is made randomly, what is the probability that the committee consists of 3 men and 2 women?
• Question over probability problems?
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