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Q14 (1 point) The strength of a female athlete is normally distributed with a mean of 50 and standard deviation of 10. In which interval do the middle 68% of the female athletes score? 30 to 70 40 to 60 30 to 50 50 to 70 015 (1 point) Let us assume you are doing a study of the predominance of lefthandedness in your hometown, which has a population of 850000. Statistics show that about 9.8% of the population are left-handed. The mean, to the nearest whole number, and the standard deviation, to the nearest hundredth, for the population of the left- handed people in your hometown are. respectively H = 83300,J = 274.1] M = 83300,o = 7513.66 11 = 833000, 0- = 274.11 a = 833000, 0' = 75l3.66 Q16 (1 point) The owners of an amusement park would like to determine what percentage of patrons are returning customers. The customers enter the park one at a time and pass an attendant who takes their tickets. A suitable survey question could be asked at that time. Not every customer would be asked because the attendant wants to keep the line moving at a steady rate. The sampling method that would likely be used is simple random sampling convenience sampling volunteer sampling systematic sampling 017 (1 point) Which of the following characteristics is found in an effective survey? The questionnaire is designed to avoid bias The random sampling technique is well designed and the sample represents the population. The wording of the questions takes into account privacy laws All of the above 09 (1 point) Suppose you ipped three coins. The theoretical probabilities for the possibles outcomes for the coin landing heads can be represented in the following table: x: number of heads showing P(x) 0 I 1 ll 2 m 3 Iv To complete the table, the probabilities represented by i. ii, iii, and iv, respectively, are: i i i l 4' 4' 4' 4 l 2 E i 8' 8' 8' 8 l 2 E l 8' 8' 8' 8 l 2 2 l 6' 6' 6' 6 010 (1 point) Which of the following conditions is required for a hypergeometric probability distribution? The probability of success does not change as trial is made The probability distribution involves series of independent trials. There are exactly two outcomes: success and failure The probability of success is equal to the probability of failure. 011 (1 point) Hoe many of the following experiments would produce binomial distributions? 0 Drawing names out of a hat without replacement and recording the number of names that begin with a vowel. 0 Counting the number of spades in a hand of 13 cards dealt from a well-shuffled deck. 0 Asking all students in a class whether they prefer Canada Dry or Pepsi I Selecting the winning ticket in a lottery I Predicting the expected number of heads when ipping a coin 100 times 0 Predicting the number of girls among ve children randomly selected from a group of eight boys and six girls. 01 2 (1 point} Which of the following is not a characteristic of a continuous random variable? Continuous random variables have graphs that are smooth curves Continuous random variables can take fractional or decimal values Continuous random variables can be determined using counting principles Continuous random variables arise from situations that involve measurement Q13 (1 point} A Company produces bags of potato chips with a labelled mass of 355 g. In reality, not all the bags have a mass of exactly 355 g, but they must be within a reasonable range of 355 g to maintain their business license. The company must perform regular quality control to ensure that the bags have close to 355 g. One hundred bags are randomly selected and their masses are recorded. The probability histogram shown below indicates the percentage of the randomly selected bags of chips whose masses fell within a specific range. Bags of chips (%) 8 3 '6 8 3 n-HN O 350 352 354 356 358 360 365 Actual mass (g) Which ofthe following conclusions can be determined from the given histogram? The percentage of the randomly chosen bags of chips with a mass between 354g and 357 g The percentage of the randomly chosen bags of chips with a mass greater than 355 g The probability that a randomly chosen bag of chips will have a mass of exactly 356 g