1.) A chi-square test was conducted between two variables. Both variables must h
ID: 3367732 • Letter: 1
Question
1.)A chi-square test was conducted between two variables. Both variables must have been quantitative.
True
False
2.) If the population standard deviation is known and sample is large enough (at least 30), we can use the standard normal Z to calculate a confidence interval.
True
False
3.)To calculate the confidence interval for average # of coffees that college students drink before a final exam, you find the sample average, sample size, and sample standard deviation. Which of these will change if I increase the sample size?
t
Z
mu
sigma
4.)A one-sample t-test can test if the population mean is equal to 100.
True
False
t
Z
mu
sigma
Explanation / Answer
1)False.Chisquare test is used for categorical data that is for qualitative variables.
2)True.By central limit theorem for a large sample size there is approximation to Normality.
3)t-value will change with sample size as it is depends on the standard error of the sample which decreases with increasing sample size.
4)True.One sample t statistic can test population mean taking a specific value against all alternatives.
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