Distinguish between a population and a sample

QUESTION

.)Distinguish between a population and a sample. Give an example.2.)Question 2 of 20:Using radar, the Highway Patrol checked the speeds (in mph) of 30 motorists passing through a checkpoint. The following are the results. Construct a dot plot for the data.3.)Question 3 of 20:A soda machine dispenses normally distributed amounts of soda with a mean of 20 ounces and a standard deviation of 0.2 ounce. Are you more likely to randomly select one bottle with more than 20.3 ounces, or are you more likely to select a sample of eight bottles with a mean amount of more than 20.3 ounces? Explain.4.)Question 4 of 20:Find the z-score that corresponds to the given area under the standard normal curve.5.)Provide an appropriate response.Explain what bias there is in a study done entirely online.A report sponsored by the California Citrus Commission stated that cholesterol levels can be lowered by drinking at least one glass of a citrus product each day. Determine if the report is biased.A local newspaper ran a survey asking, “Do you support the deployment of a weapon that could kill millions of innocent people?” Determine whether the survey question is biased.6.)Question 6 of 20:A student’s score on the SAT-1 placement test for U.S. History is in the 90th percentile. What can you conclude about the student’s test score?7.)Question 7 of 20:An insurance actuary asks a sample of senior citizens the cause of their automobile accidents over a two-year period. The random variable x represents the number of accidents caused by their failure to yield the right of way. Use the frequency distribution to construct a probability distribution.8.)Question 8 of 20:Decide whether or not events A and B are mutually exclusive. A day in Philadelphia is selected.It rains that day.It snows that day.9.)Question 9 of 20:A hundred people were asked, “Do you favor the death penalty?” Of the 33 people who answered in the affirmative, 14 were male. Of the 67 who answered in the negative, 6 were male. If one person is selected at random, what is the probability that this person answered in the affirmative or was a male?10.Question 10 of 20:Determine whether the numerical values in the following sentences are parameters or statistics. Explain with reasoning.A recent survey by the alumni of a major university indicated that the average salary of 10,000 of its 300,000 graduates was $125,000.The average salary of all assembly-line employees at a certain car manufacturer is $33,000.A university has 18,500 employees, out of which 1,103 are surveyed.11.)Question 11 of 20:In a recent survey, 90 percent of the community favored building a police substation in the neighborhood. You randomly select 16 citizens and ask each if he or she thinks the community needs a police substation. Decide whether you can use the normal distribution to approximate the binomial distribution. If so, find the mean and the standard deviation. If not, explain why.12.)Question 12 of 20:Explain why data expressed using the Celsius temperature scale is at the interval level of measurement rather than at the ratio level.13.)Question 13 of 20:Use the given frequency distribution to construct a frequency histogram, a relative frequency histogram, and a frequency polygon.14.)Question 14 of 20:You test four pain relievers. The random variable represents the pain reliever that is the most effective. Decide whether this is a binomial experiment. If it is not, explain why.15.)Question 15 of 20:In the United States, 26 percent of the people with Internet access go online to get news. A random sample of five Americans with Internet access is selected, and the five are asked if they get the news online. Identify the values of n, p, and q and list the possible values of the random variable x.16.)Question 16 of 20:For the following stem-and-leaf plot, what is the maximum entry and what is the minimum entry?Key: 11 | 2 = 11.217.)Question 17 of 20:Use the standard normal table to determine the probability. The distribution of cholesterol levels in teenage boys is approximately normal, with µ = 170 and s = 30. Levels above 200 warrant attention. If 95 teenage boys are examined, how many would you expect to have cholesterol levels greater than 225?18.)Question 18 of 20:The distribution of room and board expenses per year at a four-year college is normally distributed with a mean of $5,850 and a standard deviation of $1,125. Random samples of size 20 are drawn from this population, and the mean of each sample is determined. Would a sample mean expense of $5,180 be considered unusual? Explain.19.)Question 19 of 20:Assume that male and female births are equally likely and that the birth of any child does not affect the probability of the gender of any other children. Suppose 650 couples have a baby each; find the mean and the standard deviation for the number of girls in the 650 babies.20.)Question 20 of 20:Use the following graph, which shows the types of incidents encountered with drivers using cell phones, to determine the probability that a randomly chosen incident involves cutting off a car. Round your answer to three decimal places.

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