WorksheetsTwo means using z test
Total questions: 10
Worksheet time: 2mins
When Do we use Z-Test for Two-Sample mean?
When we compare the means of samples of dependent groups taken from a normal population
When we compare the means of samples of independent groups taken from a normal population
Why do we Use the Z-Test?
to find out if there is a significant difference between two populations by only comparing the sample mean of the population.
to find out if there is a significant difference between one populations and one sample by only comparing.
If two samples are (a) of each other, the subjects selected for the first sample in no way influence the way the subject are selected in the second sample.
If two samples are (a) if the selection of subjects for the first group in some way influenced the selection of subjects for other group.
(a)Difference is not significant. The means of the populations are the same.
Do not reject H_o: μ_1= μ_2 since 〖"x̄" 〗_1 - 〖"x̄" 〗_2 is not significant.
Do not reject H_o: μ_1= μ_2 since 〖"x̄" 〗_1 - 〖"x̄" 〗_2 is significant.
Difference is significant. The means of the populations are different.
Reject H_o: μ_1= μ_2 since 〖"x̄" 〗_1 - 〖"x̄" 〗_2 is significant
Do not Reject H_o: μ_1= μ_2 since 〖"x̄" 〗_1 - 〖"x̄" 〗_2 is significant
Which test is used for comparing two means from independent samples?In the comparison of two sample means,
(a)
Why is it called z-test?
Because the quantiles of the standard normal distribution are often denoted by "z", this test is called "z-test".
Because the quartiles of the standard normal distribution are often denoted by "z", this test is called "z-test".
What does the Z-score tell you?
Z-score indicates how much a given value differs from the standard deviation. The Z-score is the number of standard deviations a given data point lies in plane.
Z-score indicates how much a given value differs from the standard deviation. The Z-score is the number of standard deviations a given data point lies above or below mean.
What is Z Test for Two Sample Mean Test?
another parametric test used to compare the means of two independent groups of samples
another parametric test used to compare the means of two dependent groups of samples
