Exam (elaborations)
Stat 2300 Clemson Exam 3 Review questions with answers
- Course
- Stat 2300
- Institution
- Clemson University
Stat 2300 Clemson Exam 3 Review questions with answers
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Stat 2300 Clemson Exam 3 Review questions withanswers
sample proportion - ** VERIFIED ANSWERS🔰 ✔✔denoted p hat; it is the number of
individuals in the sample / the sample size (x/n); estimates the population proportion (p)
sampling distribution of sample proportion - ** VERIFIED ANSWERS🔰 ✔✔describes the
possible values the sample proportion the sample size of n could take, and how often it takes
them
center for sampling distr. of sample prop. - ** VERIFIED ANSWERS🔰 ✔✔mean of the
sampling distr. of p hat is the probability of success of p
spread for sampling distr. of sample prop. - ** VERIFIED ANSWERS🔰 ✔✔the square root
of (p (1 - p)) / n; gives the standard error of the sampling distr. of phat
standard error - ** VERIFIED ANSWERS🔰 ✔✔implies that as the sample size increases,
the spread of the sampling distribution decreases
shape for sampling distr. of sample prop. - ** VERIFIED ANSWERS🔰 ✔✔for larger
samples the sampling distr. of phat is approx. normal; considered large if np(1-p) > 10 (or
equal to)
target parameter - ** VERIFIED ANSWERS🔰 ✔✔unknown population parameter that we
are interested in estimating
target parameter for qualitative data - ** VERIFIED ANSWERS🔰 ✔✔population mean
denoted with the weird u
, target parameter for quantitative - ** VERIFIED ANSWERS🔰 ✔✔population proportion of
successes 'p'
point estimate - ** VERIFIED ANSWERS🔰 ✔✔single number that is the "best guess" for
the target parameter
for point estimate, use sample mean xbar to estimate? - ** VERIFIED ANSWERS🔰 ✔✔the
population mean (u)
for point estimate, use sample proportion of successes (phat) to estimate? - ** VERIFIED
ANSWERS🔰 ✔✔population proportion (p)
interval estimate - ** VERIFIED ANSWERS🔰 ✔✔interval of numbers within the
parameter value is believed to fall; constructed with sampling distributions
interval estimates help us to - ** VERIFIED ANSWERS🔰 ✔✔gauge the accuracy of the
point estimate
confidence interval - ** VERIFIED ANSWERS🔰 ✔✔contains the most plausible values for
a parameter based upon the results of a random sample from the population
confidence level - ** VERIFIED ANSWERS🔰 ✔✔the expected proportion of confidence
intervals that will contain the value of the target parameter if a large number of different
samples was obtained
confidence level denotation - ** VERIFIED ANSWERS🔰 ✔✔a = (1 - confidence %)
margin of error (E) - ** VERIFIED ANSWERS🔰 ✔✔measures the accuracy of the point
estimate in estimating the parameter
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