WorksheetsTEST OF HYPOTHESIS USING THE T-TEST
Total questions: 20
Worksheet time: 11mins
A statistical test that is used to compare the means of two groups. It is often used in hypothesis testing to determine whether a process or treatment actually has an effect on the population of interest, or whether two groups are different from one another.
The T-TEST is used when n < 30 and only the sample standard deviation is given as a basis for the estimation of the population standard deviation.
TRUE
FALSE
Is only used when n<30 and only the sample standard deviation is given as a basis for the estimation of the population standard deviation.
(a)
Z-TEST is used for small for sizes (when n < 30) and when the population variance is unknown
TRUE
FALSE
A t-test is a significance test that assesses
The modes of two independent groups
The medians of two dependent groups
The standard deviation of the independent variables
The means of two independent groups
Which of these tests would use a t‐statistic rather than a z‐statistic?
One sample mean test with a known population standard deviation
One sample proportion test
One sample mean test with an unknown population standard deviation
The formulas used for the t-test are SIMILAR to the z-test
FALSE
TRUE
The shape of a T-distribution is (a) to that of a Z-distribution
T-TEST is used for large (when n > 30) or when the population is know to be normally distributed with a given population variance
T-Test
Z-Test
a is expressed as a percent
(a)
T-TEST is used for large (when n > 30) or when the population is known to be normally distributed with a given population variance
(a)
In reality, the null hypothesis may or may not be true, and a decision is made to reject or not to reject it on the basis of the data obtained from a sample.
FALSE
TRUE
Which hypothesis is generally formulated to look for evidence to support a claim called a research hypothesis?
alternative hypothesis
null hypothesis
statistical hypothesis
What hypothesis states equality or no difference, or no relationship/effect?
statistical hypothesis
null hypothesis
alternative hypothesis
A two sample z‐test for the difference in population means is conducted. Which is NOT a possible alternative hypothesis?
The one-sample z statistic is used instead of the one-sample t-statistic when ____.
σ is known
μ is unknown
μ is known
σ is unknown
T t-test formula to be used if n1 ≠ n2 is?
a is expressed as a percent
TRUE
FALSE
Z-TEST is used for large (when n > 30) or when the population is known to be normally distributed with a given population variance
FALSE
TRUE
The difference between z-test and t-test?
