A pharmaceutical company conducts a study where 50 patients are given a drug. They find that 10% of their sample experiences nausea as a side effect. This 10% is an example of a _______________________. Question options: parameter statistic variable mean
A pharmaceutical company conducts a study where 50 patients are given a drug. They find that 10% of their sample experiences nausea as a side effect. This 10% is an example of a _______________________.
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parameter |
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statistic |
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variable |
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You are given the following data: 23, 34, 11, 40, 25, 47. Assuming that the data reflect the population of interest, what is the mean of the population?
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The mean is 30. |
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The mean is 29.5. |
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The mean is 25. |
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The mean is 34. |
The Good-Guys Car Dealership has tracked the number of used cars sold at its downtown dealership. Consider the following data as representing the population of cars sold in each of the 8 weeks that the dealership has been open: 3, 5, 2, 7, 7, 7, 9, 0. What is the population standard deviation?
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3.1 cars |
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5 cars |
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7 cars |
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2.9 cars |
The Nationwide Motel Company has determined that 70% of all calls for motel reservations request nonsmoking rooms. Recently, the customer service manager for the company randomly selected 15 calls. Assuming that the distribution of calls requesting nonsmoking rooms is described by a binomial distribution, what is the probability that exactly 5 customers will request smoking rooms?
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0.003 |
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0.206 |
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0.071 |
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0.300 |
The bottlers of a new fruit juice daily select a random sample of 12 bottles of the drink to estimate the mean quantity of juice in the bottles filled that day. On one such day, a sample was taken with a sample mean of 12.03 and a sample standard deviation of 0.12. Based on this information, what is the margin of error associated with a 90% confidence
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0.020 |
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0.070 |
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0.040 |
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0.033 |
Suppose we want to test H0: μ ≥30 versus H1: μ < 30.H0: μ ≥30 versus H1: μ < 30.α = 0.05,α = 0.05,
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0.4 |
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7.5 |
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-3.0 |
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-7.5 |
A major issue facing many states is whether to legalize casino gambling. Suppose the governor of one state believes that more than 55% of the state's registered voters would favor some form of legal casino gambling. However, before backing a proposal to allow such gambling, the governor has instructed his aides to conduct a statistical test on the issue. To do this, the aides have hired a consulting firm to survey a simple random sample of 300 voters in the state. Of these 300 voters, 175 actually favored legalized gambling. What are the appropriate null and alternative hypotheses?
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H0: p = 0.55 and H1: p ≠ 0.55H0: p = 0.55 and H1: p ≠ 0.55 |
H0: p = 0.58 and H1: p ≠ 0.58H0: p = 0.58 and H1: p ≠ 0.58 |
H0: p ≤ 0.55 and H1: p > 0.55H0: p ≤ 0.55 and H1: p > 0.55 |
H0: p ≤ 0.58 and H1: p > 0.58 |
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