#1
What is a point estimate?
An estimate that specifies a single value as the best guess for the parameter of interest
ExplanationSingle-value best guess for a parameter
#2
What is the formula for the standard error of the mean?
Standard deviation / Square root of sample size
ExplanationSE of mean = SD / √n
#3
Which of the following is NOT a common sampling method?
Quota sampling
ExplanationNot a common sampling method
#4
What is the difference between a population and a sample?
A sample is a subset of a population
ExplanationSample is a subset of population
#5
What is the difference between a parameter and a statistic?
A parameter is a measure of a population characteristic, while a statistic is a measure of a sample characteristic
ExplanationParameter: population, Statistic: sample
#6
What is sampling distribution?
A distribution of sample statistics
ExplanationDistribution of sample statistics
#7
What is the central limit theorem?
A theorem that describes the distribution of a sample mean
ExplanationDescribes distribution of sample mean
#8
Which of the following statements about sampling distributions is true?
As the sample size increases, the standard error of the mean decreases
ExplanationLarger sample, smaller SE of mean
#9
What is the margin of error in a confidence interval?
The maximum amount by which the sample statistic is expected to differ from the true population parameter
ExplanationMaximum difference in statistic and parameter
#10
What is bootstrapping in statistics?
A method for estimating the sampling distribution of a statistic by repeatedly resampling with replacement from the observed data
ExplanationEstimating sampling distribution through resampling
#11
Which of the following statements about sampling bias is true?
Sampling bias occurs when the sample does not accurately represent the population
ExplanationSampling bias: inaccurate representation
#12
What is the purpose of stratified sampling?
To divide the population into groups based on similar characteristics
ExplanationDividing population into similar groups
#13
In hypothesis testing, what does a p-value represent?
The probability of obtaining the observed data, or more extreme data, assuming the null hypothesis is true
ExplanationProbability under null hypothesis
#14
What is the formula for the margin of error in a confidence interval for a population mean?
Z * (Standard deviation / Square root of sample size)
ExplanationMargin of error formula
#15
What is the formula for calculating the confidence interval for a population proportion?
Sample proportion ± (Z * Standard error)
ExplanationCI formula for population proportion