0 Question 1 E 2 pts '0 1 Details In a study, the data you collect is Habits on a Always] Sometimes! Never scale. This data is: A Quantitative A Qualitative Submit Question 0 Question 2 B 5 pts '0 1 (D Details For each question below, please select the sampling method that most closely matches the description. You may use each method more than once. a. You work for the school newspaper. You want to survey the students for their opinions about a recent issue. During the hour that you have assigned to work on the newspaper, you walk around the school interviewing any students that are available. Select an answer a b. You work for a company as a quality control specialist. You want to check the current production of products for defects. You locate the finished products for the day and inspect the first 20 items you happen to see. Select an answer a c. You work for a company as a quality control specialist. You want to check the current production of products for defects. Your factory has 5 different assembly lines. At the end of the day, you randomly choose two of the assembly lines and inspect each item produced by that assembly line. Select an answer a d. There are 35 rides at a large theme park, and a team of journalists wants to interview some customers. The journalists randomly chooses 5 of the rides and interview all of the people exiting those rides. Select an answer a e. You work for a company as a quality control specialist. You want to check the current production of products for defects. You go down to the factory floor assembly line and randomly choose the first item to inspect. You then inspect every 15th item that comes off the assembly lines until you have inspected 20 items. Select an answer 3 Submit Question . Question 3 E4 2 pts '0 1 6) Details Suppose the true proportion of voters in the county who support a new fire district is 0.65. Consider the sampling distribution for the proportion of supporters with sample size n = 188. What is the mean of this distribution? :] What is the standard deviation of this distribution? Round to 4 decimal places. Submit Question 0 Question 4 E4 8 pts '0 1 (D Details A home pregnancy test was given to people who might be pregnant. Then to check its accuracy, each person was given a blood test to see if they really were pregnant. The following table shows the home pregnancy test results for people who were and were not actually pregnant. Positive Home Test Negative Home Test Total _5 71 II 151 Round your answers to 4 decimal places. a. What is the probability of getting a postive home test? [:] b. What is the probability of getting a postive home test and not being pregnant? C] c. What is the probability of getting a negative home test given the person is pregnant? C] d. What is the probability that a person is not pregnant given they get a negative home test? [3 0 Question 5 E4 6 pts '0 1 (D Details American Airlines' flights from Denver to Seattle are on time 50 % of the time. Suppose 9 flights are randomly selected, and the number of on-time flights is recorded. Round answers to 4 decimal places. a. The probability that exactly 6 flights are on time is E. b. The probability that at most 4 flights are on time is :]. c. The probability that at least 7 flights are on time is :]. Submit Question 0 Question 6 E4 8 pts '0 1 (D Details The heights of 10-year-olds, regardless of gender, closely follow a Normal distribution with a mean of 54 inches and a standard deviation of 5 inches. a. What is the probability that a randomly chosen 10-year-old is shorter than 47 inches? (Round to 4 decimal b. What is the probability that a randomly chosen 10-year-old is between 61 and 65 inches? (Round to 4 decimal places.) c. If the tallest 10% of the class is considered "very tall", what is the height cutoff for "very tall"? (Round to 2 d. Kids must be at least 53 inches tall to go on Batman the Ride at Six Flags Magic Mountain. What percentage of 10-year-olds cannot go on this ride? (Round your percentage to 2 decimal places.) :96 Submit All Parts 0 Question 7 8 4 pts '0 1 G Details According to the article "Are Babies Normal?" by Traci Clemons and Marcello Pagano published in The American Statistician, Vol. 53, No. 4, pp. 298-302, the birth weights of babies are normally distributed with a mean of 3300 grams and a standard deviation of 585 grams. a. What is the probability that a randomly selected baby weighs between 3000 grams and 3700 grams? Round your answer to 4 decimal places. [:l B. What is the probability that the average weight of 11 randomly selected babies is between 3000 grams and 3700 grams? Round your answer to 4 decimal places. [:l Submit Question 0 Question 8 8 2 pts '0 1 (D Details According to a 2009 Reader's Digest article, people throw away approximately 10% of what they buy at the grocery store. Assume this is the true proportion and you plan to randomly survey 248 grocery shoppers to investigate their behavior. What is the probability that the sample proportion exceeds 0.09? Answer = [3 (Enter your answer as a number accurate to 4 decimal places.) Submit Question 0 Question 9 E 5 pts '0 1 (D Details Based on historical data at Oxnard college, they believe that 35% of freshmen do not visit their advisors regularly. For this year, you would like to obtain a new sample to estimate the proportion of freshmen who do not visit their advisors regularly. You would like to be 90% confident that your estimate is within 3.5% of the true population proportion. How large of a sample size is required? mm Submit Question 0 Question 10 B 6 pts '0 1 (D Details This week, a very large running race (5K) occured in Denver. The times were normally distributed, with a mean of 23.96 minutes and a standard deviation of 2.06 minutes. a. What percent of runners took 28.698 minutes or less to complete the race? I: b. What time in minutes is the cutoff for the fastest 30.85 96? [:I c. What percent of runners took more than 23.033 minutes to complete the race? [: Submit Question 0 Question 11 B 2 pts '0 1 (D Details A Food Marketing Institute found that 27% of households spend more than $125 a week on groceries. Assume the population proportion is 0.27 and a simple random sample of 458 households is selected from the population. What is the probability that the sample proportion of households spending more than $125 a week is less than 0.26? Answer = [:] (Enter your answer as a number accurate to 4 decimal places.) Submit Question 0 Question 12 13 4 pts '0 1 (D Details The average resting heart rate of a population is 87 beats per minute, with a standard deviation of 11.5 bpm. Find the z-scores that correspond to each of the following heart rates. Round your answers to the nearest hundredth, if necessary. (a) 114 bpm \"a (b) 76 bpm \"[3 Submit Question 0 Question 13 B 6 pts '0 1 (D Details The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.957 g and a standard deviation of 0.295 g. The company that produces these cigarettes claims that it has now reduced the amount of nicotine. In what range would you expect to find the middle 98% of amounts of nicotine in these cigarettes (assuming the mean has not changed)? If you were to draw samples of size 33 from this population, in what range would you expect to find the middle 98% of most average amounts of nicotine in the cigarettes in the sample? Enter your answers as numbers. Your answers should be accurate to 4 decimal places. Submit