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Study Resources (Statistics)

    Use the following information for questions (11) and (12).  On a busy day, the average roller coaster wait time at a large amusement park is 27 minutes.  Suppose the standard deviation of wait time is 11.9 minutes and the distribution of wait times is approximately normally distributed. 11. If it is.
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  For questions (1)-(3), fill in the blank to complete the statement. 1. Suppose that the age of all the U. S. vice presidents when they took office was recorded. The collection of the ages of all the U. S. vice presidents when they took office is a_______________. a. Population b. Sample c. Parameter d. Statistic 2..
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    Use the following information to answer questions (16)-(18).  Suppose that a recent poll of single people over the age of thirty-five were asked about their living arrangements.  The poll found that 34% rented a house or apartment, 21% owned a house, and 17% owned a condominium.  Suppose that four single.
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  Use the following data to answer questions (16)-(18).  Here are the scores on a recent statistics midterm exam (Scores have been listed from lowest to highest).  A histogram showing the distribution is also included. 16. Which measure of center, mean or median, would be most appropriate, and why?  Using the.
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1.Consider one toss of a fair six-sided die.  State the sample space of possible outcomes.  State one possible random event then state the theoretical probability of that event.  Explain how you know that this is the probability of the random event. 2.Describe the difference between a theoretical probability and an empirical.
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  16. When a two-sample test of proportions is conducted, there are two conditions of independence that must be checked.  State the two conditions of independence.  Be sure that your statement clearly states the difference between the two conditions. Use the following information to answer questions (17) and (18).  A child psychologist.
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  Use the following information to answer questions (11) and (12).   A researcher is wondering whether the drinking habits of adults in a certain region of the country are in the same proportion as the general population of adults.  Suppose a recent study stated that the proportion of adults who reported.
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1.Which of the following statements is not true about probability? a.A probability of zero means that an event will not happen, a probability of one means that an event is certain to happen. b.Probability is used to measure how often random events occur. c.Probabilities are always numbers between 0 and 1 inclusive. d.All of.
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  Use the following information to answer questions (11)-(13)  A scatterplot shows that city size of residence and number of children born to married couples has a decreasing linear trend, that is, on average, as the city size where a married couple lives increases the number of children that a married.
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  For questions (6) and (7), shade the approximate area that would represent the p-value for the alternative hypothesis and z-score, and then calculate the p-value.  Round to the nearest thousandth. 6. The alternative hypothesis is a right-tailed with a z-score = 0.21 7. The alternative hypothesis is a two-tailed with a z-score.
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  11. Suppose it has been established that “annual income” and “Years of college” are linearly related, and that the relationship can be modeled using the following equation:  Annual Income = $23,400+$7200(Years of College).  In this model, “Annual Income” is the __?__ variable, and “Years of College” is the __?__ variable. .
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  1. Explain the difference between a discrete random variable and a continuous random variable and give an example of each. 2. When exposed to heat, the reaction time of a certain chemical always occurs after thirteen minutes, but before 17 minutes.  Reaction times for this chemical can be modeled by a.
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1. Complete the statement by filling in the blanks.  The null hypothesis is ____________ to be ______ and is only rejected when the observed outcome is shown to be _____________________________. a.Proven; true; impossible b.Known; true; the population parameter c.Assumed; true; extremely unlikely d.Likely; false; extremely likely 2. Read the following problem description then choose the.
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  Use the information that follows to answer questions (6)-(8).  Circumferences of regulation soccer balls have a mean of 69 cm with as standard deviation of 1.50 cm.  Assume that the circumferences of soccer balls are approximately normally distributed. 6. Roughly what percentage of regulation soccer balls has a circumference that is.
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  Use the following information to answer questions (11) – (13).  A health foods shop owner is wondering if his customer’s daily vitamin supplement habits are in the same proportion as the general population of adults.   The shop owner heard in a news report that 60% of all adults reported that.
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  Use the following information for questions (16) – (19).  Suppose that the probability that the train travelling from Holland, Michigan to Chicago, Illinois arrives on time is 0.80.  For the questions that follow, consider a sample of twenty randomly selected train trips. 16. Approximately how many trips would you expect to.
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  Use the following information to answer questions (12)-(14).  The economic impact of an industry, such as sport fishing, can be measured by the retail sales it generates.   In 2006, the economic impact of great lakes fishing in states bordering the great lakes had a mean of $318 and a standard.
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  11.If one student is randomly chosen from the group, what is the probability that the student is female or chose “homework” as their most likely activity on a Saturday morning? a.0.665 b.0.900 c.0.755 d.None of the above 12.Find the probability that a male college student from the group chose “homework” as their most likely activity.
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  1.Which of the following statements is not true about probability in general? a.Probability is used to measure how often random events occur. b.Probabilities are always numbers between 0 and 1 inclusive. c.A probability of 0 means that an event will not occur and a probability of 1 means that an event is certain.
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  Use the following information to answer questions (12)-(14).  The economic impact of an industry, such as sport fishing, can be measured by the retail sales it generates.   In 2006, the economic impact of great lakes fishing in states bordering the great lakes had a mean of $318 and a standard.
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  1. Determine whether the variable would best be modeled as continuous or discrete:  The number of cups dispensed from a beverage vending machine during a 24-hour period. a.Continuous b.Discrete 2. Determine whether the variable would best be modeled as continuous or discrete:  The temperature of a cup of coffee dispensed from a beverage.
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  11.What is the probability that a randomly chosen survey respondent is male or chose “recreation” as their most likely activity on Saturday mornings? a.0.790 b.0.480 c.0.675 d.None of the above 12.Find the probability that a female college student from the group chose “housework” as their most likely activity on Saturday mornings?  (round to the nearest.
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  1.Which of the following is not true about the alternative hypothesis? a.It is sometimes called the research hypothesis. b.It is assumed to be true based on the sample results. c.Like the null hypothesis, it is always a statement about a population parameter. d.It is usually a statement that the researcher hopes to demonstrate is.
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  Use the following information to answer questions (11) - (13).  A researcher is wondering whether the drinking habits of adults in a certain region of the country are in the same proportion as the general population of adults. Suppose a recent study stated that the proportion of adults who reported.
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  11. Suppose it has been established that “home value” and “Years of college” are linearly related, and that the relationship can be modeled using the following equation:  Home value = $75,000+$12,500(Years of College).  In this model, “years of college” is the __?__ variable, and “home value” is the __?__ variable. .
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1. Determine whether the variable would best be modeled as continuous or discrete:  The temperature of a greenhouse at a certain time of the day. a.Continuous b.Discrete 2. Determine whether the variable would best be modeled as continuous or discrete:  The number of tomatoes harvested each week from a greenhouse tomato plant. a.Continuous b.Discrete 3. At.
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  11.If one person is chosen randomly from the group, what is the probability that the person purchased a sport utility vehicle or a pick-up truck? 12.Find the probability that a randomly chosen female buyer bought a van.  (Round to the nearest hundredth) 13.Using this example, state two events that are mutually exclusive. 14.Suppose.
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  1. Doctors believe that smoking cigarettes lowers lung capacity.  To test this they measured the lung capacity (in liters) and the number of cigarettes smoked in a typical day for a sample of adults.  Is the scatterplot below consistent with the researcher’s hypothesis?   a. Yes, it is consistent. b. No, it contradicts.
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  Use the following information to answer questions (6)-(8).  A marble manufacturer advertises that its bags of marbles will contain 25% “milky-white” marbles.  Suppose that a bag containing 80 marbles is inspected. 6. What value should we expect for our sampling percentage of milky-white marbles?  How many marbles would this be?  Round.
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