STAT 266- test answers Question and
answers 100% correct 2025/2026
if the distribution is heavily skewed to the left, then the mean is most likely ____ than the median. -
correct answer ✔less
if the distribution is heavily skewed to the right, then the mean is most likely ____ than the median. -
correct answer ✔more
in a dotplot of a bootstrap distribution, the number of dots should be ___ than/to the size of the original
sample. - correct answer ✔more
where should a sampling distribution be centered? - correct answer ✔population parameter
what does association not imply? - correct answer ✔causation
where is a randomization distribution centered around? - correct answer ✔null hypothesis
where is a bootstrap distribution centered? - correct answer ✔sample statistic
where is the interval for a 95% confidence interval? - correct answer ✔2.5% to 97.5%
what is calculated using the standard deviation of a sampling distribution? - correct answer ✔standard
error
a low p-value provides evidence for the alternative hypothesis, but a high p-value does not provide
evidence for the null hypothesis. - correct answer ✔true
, a bootstrap sample has the same ____ and ____ as the original sample, but it can repeat values and not
include some. - correct answer ✔size, numbers
what statistics are resistant to outliers? - correct answer ✔median and IQR
what is the probability, when the null hypothesis is true, of obtaining a sample as (or more extreme
than) the observed sample. - correct answer ✔p-value
what type of error is a false negative (letting go of guilty), or not rejecting the null hypothesis when the
null hypothesis is false? - correct answer ✔Type II error
what type of error is a false positive (accusing innocent), or rejecting a null hypothesis when the null
hypothesis is correct.? - correct answer ✔Type I error
If the significance level decreases, then the p-value will ____. - correct answer ✔stay
If there is a _____ difference, D = x-bar1 - x-bar2, the more evidence against the null hypothesis, mu1 =
mu2. - correct answer ✔bigger
a variable with categorical data - correct answer ✔categorical variable
a variable with a numerical value - correct answer ✔quantitative variable
what term has the following formulas:
(sample statistic - sample mean)/standard deviation
(sample statistic - null parameter)/standard error
answers 100% correct 2025/2026
if the distribution is heavily skewed to the left, then the mean is most likely ____ than the median. -
correct answer ✔less
if the distribution is heavily skewed to the right, then the mean is most likely ____ than the median. -
correct answer ✔more
in a dotplot of a bootstrap distribution, the number of dots should be ___ than/to the size of the original
sample. - correct answer ✔more
where should a sampling distribution be centered? - correct answer ✔population parameter
what does association not imply? - correct answer ✔causation
where is a randomization distribution centered around? - correct answer ✔null hypothesis
where is a bootstrap distribution centered? - correct answer ✔sample statistic
where is the interval for a 95% confidence interval? - correct answer ✔2.5% to 97.5%
what is calculated using the standard deviation of a sampling distribution? - correct answer ✔standard
error
a low p-value provides evidence for the alternative hypothesis, but a high p-value does not provide
evidence for the null hypothesis. - correct answer ✔true
, a bootstrap sample has the same ____ and ____ as the original sample, but it can repeat values and not
include some. - correct answer ✔size, numbers
what statistics are resistant to outliers? - correct answer ✔median and IQR
what is the probability, when the null hypothesis is true, of obtaining a sample as (or more extreme
than) the observed sample. - correct answer ✔p-value
what type of error is a false negative (letting go of guilty), or not rejecting the null hypothesis when the
null hypothesis is false? - correct answer ✔Type II error
what type of error is a false positive (accusing innocent), or rejecting a null hypothesis when the null
hypothesis is correct.? - correct answer ✔Type I error
If the significance level decreases, then the p-value will ____. - correct answer ✔stay
If there is a _____ difference, D = x-bar1 - x-bar2, the more evidence against the null hypothesis, mu1 =
mu2. - correct answer ✔bigger
a variable with categorical data - correct answer ✔categorical variable
a variable with a numerical value - correct answer ✔quantitative variable
what term has the following formulas:
(sample statistic - sample mean)/standard deviation
(sample statistic - null parameter)/standard error
