Simple stat questions 14 ~ 18 11:24 catalyst.uw.edu 0.000 Verizon 75% Question 1

Question

Simple stat questions 14 ~ 18 11:24 catalyst.uw.edu 0.000 Verizon 75% Question 14. Which of the following statements reflect what you have just learned about sampling populations and descriptive statistics? True Larger sample sizes allow more precise estimates of the true population mean. Larger sample sizes decrease the estimate of standard deviation of the population. Larger sample sizes decrease the estimate of standard Standard error is the standard deviation of population means when sampled multiple times Question 15 What is a confidence interval? The Cl is a range of values that has a particular chance of containing the true population mean- obviously. you would like this chance to be high, for instance, 95%. Look at the first three minutes of this video: https://www.youtube.com/watch?v=PSruwi3iREg What three statistics are minimally necessary to calculate the confidence interval? false standard deviation t-statistic sample size Question 16. The level of significance (alpha - the greek letter seems to be unavailable) can be understood as the decimal value of the percent probability that the true population mean lies outside of the range of the confidence interval. It is essentially the opposite of the confidence interval: a 95% CI corresponds to alpha-0.05 indicating a 95% chance that the true mean is inside the CI and 5% probability that the true mean is outside of the CI. To ensure that the confidence interval has a high probability of containing the population mean, ecologists (and biologists in general) set alpha to 0.05 or lower. Fill in the table describing the relationship between

Explanation / Answer

14)

true

false

false

true

15)

True

True

False

False

True

16)

alpha=0.1

alpha=0.05

alpha=0.01

17)

99%

18)

99%

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