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#Question id: 16874
#Section 3: Mathematics and Quantitative Ecology
A randomly selected sample of 1,000 college students was asked whether they had ever used the drug Ecstasy. Sixteen percent (16% or 0.16) of the 1,000 students surveyed said they had. Which one of the following statements about the number 0.16 is correct?
TLS Online TPP Program
#Question id: 16875
#Section 3: Mathematics and Quantitative Ecology
In a random sample of 1000 students, pˆ = 0.80 (or 80%) were in favor of longer hours at the school library. The standard error of pˆ (the sample proportion) is
TLS Online TPP Program
#Question id: 16876
#Section 3: Mathematics and Quantitative Ecology
For a random sample of 9 women, the average resting pulse rate is x = 76 beats per minute, and the sample standard deviation is s = 5. The standard error of the sample mean is
TLS Online TPP Program
#Question id: 16877
#Section 3: Mathematics and Quantitative Ecology
Assume the cholesterol levels in a certain population have mean μ= 200 and standard deviation σ = 24. The cholesterol levels for a random sample of n = 9 individuals are measured and the sample mean x is determined. What is the z-score for a sample mean x = 180?
TLS Online TPP Program
#Question id: 16878
#Section 3: Mathematics and Quantitative Ecology
In a past General Social Survey, a random sample of men and women answered the question “Are you a member of any sports clubs?” Based on the sample data, 95% confidence intervals for the population proportion who would answer “yes” are .13 to .19 for women and .247 to .33 for men. Based on these results, you can reasonably conclude that
TLS Online TPP Program
#Question id: 16879
#Section 3: Mathematics and Quantitative Ecology
Suppose a 95% confidence interval for the proportion of Americans who exercise regularly is 0.29 to 0.37. Which one of the following statements is FALSE?