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- 1. Multiple Choice
These symbols represent the mean and standard deviation for which of the following distributions?The PopulationThe SampleThe Sampling Distribution - 2. Multiple ChoiceThese symbols represent the mean and standard deviation for which of the following distributions?The PopulationThe SampleThe Sampling Distribution
- 3. Multiple ChoiceThese symbols represent the mean and standard deviation for which of the following distributions?The PopulationThe SampleThe Sampling Distribution
- 4. Multiple ChoiceWhat happens to the shape of a sampling distribution of sample means as n increases?It becomes narrower and bimodal.It becomes narrower and more normal.It becomes wider and skewed right.It becomes wider and more normal.
- 5. Multiple ChoiceA distribution showing the sample means of all sample of size n of a population is calledNormal DistributionBinomial DistributionSampling DistributionUniform Distribution
- 6. Multiple ChoiceThe Gallup Poll asked a random sample of 1785 adults whether they attended church during the past week. Let p-hat be the proportion of people in the sample who attended church. A newspaper report claims that 40% of all U.S. adults went to church last week. Suppose this claim is true.
What is the mean of the sampling distribution of p-hat?0.40.440.560.6 - 7. Multiple Choice
28% of all Suncoast students believe in Santa. You take a sample of 50 students and find that 15 of them believe in Santa. What does 15/50 represent?
n
P
phat
standard deviation
- 8. Multiple ChoiceThe mean and standard deviation of a population are 200 and 20, respectively. Sample size is 25.
What is the mean of the sampling distribution?20016254 - 9. Multiple ChoiceThe mean and standard deviation of a population are 200 and 20, respectively. Sample size is 25.
What is the standard deviation of the sampling distribution?20016254 - 10. Multiple ChoiceAt a particular college, 78% of all students are receiving some kind of financial aid.The school newspaper selects a random sample of 100 students and 72% of the respondents say they are receiving some sort of financial aid. Which of the following is true?78% is a population and 72% is a sample.72% is a population and 78% is a sample78% is a parameter and 72% is a statistic72% is a parameter and 78% is a statistic
- 11. Multiple ChoiceCalculate μx-bar and σx-bar if μ = 794, σ = 48, and n = 64μx-bar = 794, σx-bar = 0.75μx-bar = 12.4, σx-bar = 0.75μx-bar =794, σx-bar = 6μx-bar = 99.25, σx-bar = 6
- 12. Multiple ChoiceThe average cost for a gallon of gasoline is $2.51 (source AAA.org) with a standard deviation of $0.42. Find the mean and standard error of the sampling distribution if n = 49μx-bar = 2.51, σx-bar = 0.06μx-bar = 0.358, σx-bar = 0.06μx-bar = 2.51, σx-bar = 0.06μx-bar = 2.51, σx-bar = 0.857
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