statistics final exam - Part 1 of 9 1.0 1.0 Points Question

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Part 1 of 9 - 1.0/ 1.0 Points Question 1 of 25 1.0/ 1.0 Points Which of the following correctly describes the relationship between a sample and a population? Answer Key: Part 2 of 9 - 2.... 0/ 2.0 Points Question 2 of 25 1.0/ 1.0 Points A gumball machine contains 300 grape flavored balls, 400 cherry flavored balls, and 500 lemon flavored balls. What is the probability of getting 1 grape ball, 1 cherry ball, and 1 lemon ball if each ball was removed and then replaced before choosing the next from the machine? Answer Key: Question 3 of 25 1.0/ 1.0 Points A furniture manufacturer offers bookcases in 5 different sizes and 3 different colors. If every color is available in every size, then the total number of different bookcases is Answer Key: Part 3 of 9 - 3.0/ 3.0 Points Question 4 of 25 1.0/ 1.0 Points Find the variance of the following probability distribution. X P(X) 1 0.10 2 0.35 3 0.10 4 0.15 5 0.30 Answer Key: Question 5 of 25 1.0/ 1.0 Points Find the variance of the following probability distribution. X P(X) 1 0.20 2 0.35 3 0.10 4 0.25 5 0.10 Answer Key: Question 6 of 25 1.0/ 1.0 Points In a small town, 60% of the households have dogs. If 5 households are randomly selected, what is the probability that at least 4 of them have dogs? Answer Key: Part 4 of 9 - 5.0/ 6.0 Points Question 7 of 25 0.0/ 1.0 Points The standard deviation of a probability distribution must be: Answer Key: Question 8 of 25 1.0/ 1.0 Points The standard deviation of is usually called the Answer Key: Question 9 of 25 1.0/ 1.0 Points The standard deviation of a probability distribution is a: Answer Key: Question 10 of 25 1.0/ 1.0 Points One reason for standardizing random variables is to measure variables with: Answer Key: Question 11 of 25 1.0/ 1.0 Points The normal distribution is: Answer Key: Question 12 of 25 1.0/ 1.0 Points If Z is a standard normal random variable, then the value z for which P(-z < Z < z) equals 0.8764 is Answer Key: Part 5 of 9 - 1.0/ 1.0 Points Question 13 of 25 1.0/ 1.0 Points Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker. Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values. For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not. The histogram below represents scores achieved by 250 job applicants on a personality profile. How many job applicants scored above 50? Place your answer in the blank. Do not use any stray symbols. For example, 123 would be a legitimate answer. Answer Key: Part 6 of 9 - 0.0/ 2.0 Points Question 14 of 25 0.0/ 1.0 Points Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker. Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values. For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not. The following data were obtained from a survey of college students. The variable X represents the number of non- assigned books read during the past six months. x 0 1 2 3 4 5 6 P (X=x) 0.55 0.15 0.10 0.10 0.04 0.03 0.03 What is the standard deviation of X? Place your answer, rounded to two decimal places in the ................................................................................................continued..................................................................................... [Show More]

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