STT 200 Exam 2 review (updated)
questions with verified answers
Conditions for 1 proportion hypothesis test, (1-prop Z test) - correct answer✔✔ There must be at least
10 success and 10 failure observations in the sample
The observations. must be independent of one another
Conditions for one proportion confidence interval (1 prop z-int) - correct answer✔✔ There must be at
least 10 success and 10 failure observations in the sample
Conditions for one 1 population mean confidence interval (T- interval) - correct answer✔✔ The
sample size must be at least 30 or the population must be normally distributed
The observations must be independent of one another
Conditions for x^2 test of goodness fit - correct answer✔✔ there must be an expected count of at
least 5 for each level of the categorial variable
each case in the table must be independent of all other cases
there must be at least 3 levels of the categorical variable
conditions for the x^2 test of independence - correct answer✔✔ there must be an expected count of
at least 5 for each level of the categorical variable
each case in the table must be independent of all other cases
How do you calculate the test statistic - correct answer✔✔ 1- prop z test
how do you calculate the p-value given the test statistic - correct answer✔✔ use the normal cdf value-
and use the test statistic as the lowest value and 10^10 as the highest. and 0,1 and the mean and
standard deviation.
questions with verified answers
Conditions for 1 proportion hypothesis test, (1-prop Z test) - correct answer✔✔ There must be at least
10 success and 10 failure observations in the sample
The observations. must be independent of one another
Conditions for one proportion confidence interval (1 prop z-int) - correct answer✔✔ There must be at
least 10 success and 10 failure observations in the sample
Conditions for one 1 population mean confidence interval (T- interval) - correct answer✔✔ The
sample size must be at least 30 or the population must be normally distributed
The observations must be independent of one another
Conditions for x^2 test of goodness fit - correct answer✔✔ there must be an expected count of at
least 5 for each level of the categorial variable
each case in the table must be independent of all other cases
there must be at least 3 levels of the categorical variable
conditions for the x^2 test of independence - correct answer✔✔ there must be an expected count of
at least 5 for each level of the categorical variable
each case in the table must be independent of all other cases
How do you calculate the test statistic - correct answer✔✔ 1- prop z test
how do you calculate the p-value given the test statistic - correct answer✔✔ use the normal cdf value-
and use the test statistic as the lowest value and 10^10 as the highest. and 0,1 and the mean and
standard deviation.
