Statistics
posted by Luah .
1. z test
2. t test for independent samples, and
3. t test for dependent samples
Hi! I really need help with this statistics. Its just that you suggest one psychological research question that could be answered by each of the following types of statistical tests above. Im so confused ! Hopefully, you could help :)) Thank youuu

Usually you use ztests when sample sizes are large (n is greater than
or equal to 30) whether or not you know the population standard deviation.
If you do not know the population standard deviation and have a small
sample (n < 30), then you can use ttests.
Ttests for independent samples uses two different sets of research subjects. Ttests for dependent samples uses the same research subjects in two different conditions (like a "before" condition and an "after" condition) or when there are two samples that have been matched or "paired" in some way.
You can find examples of these types of tests online or in any statistics textbook. 
Are my answers here correct ?
Research questions for z test, t test for independent samples and t test for dependent samples :
z test: "An investigator is interested in finding out whether the particular sample of college students is similar to or different from college students in general.
t test for independent samples: "Do 11th graders have significantly more unexcused absences than 10th graders in junior highs?
t test for dependent samples: " Do people drop weight after attending a weight loss boot camp for 2 months? 
Suggest one psychological research question that could be answered by each of the following types of statistical tests:
z test
t test for independent samples, and
t test for dependent samples
Respond to this Question
Similar Questions

stats
Which test do you use to solve this problem Onesample or independent samples ttest? 
stats
Which test do you use to solve this problem Onesample or independent samples ttest? 
stats
Which test should be used one samples t test, independent samples t test or dependent samples t test You may have heard that eating salt can influence people’s weight. Assume that the normal weight of 20yearold females is 150 pounds. … 
stats
Which test should be used one samples t test, independent samples t test or dependent samples t test You may have heard that eating salt can influence people’s weight. Assume that the normal weight of 20yearold females is 150 pounds. … 
Statistics Help !!
Are my answers here correct ? Research questions for z test, t test for independent samples and t test for dependent samples : z test: "An investigator is interested in finding out whether the particular sample of college students 
Statistics
Are my answers here correct ? Research questions for z test, t test for independent samples and t test for dependent samples : z test: "An investigator is interested in finding out whether the particular sample of college students 
Statistics Help !!!!
Are my answers here correct ? Research questions for z test, t test for independent samples and t test for dependent samples : z test: "An investigator is interested in finding out whether the particular sample of college students 
Psy
Suggest one psychological research question that could be answered by each of the following types of statistical tests: •z test •t test for independent samples, and •t test for dependent samples 
statistics
A credit card company estimates that the average credit card balance of Americans is $3,210. A statistics student wants to know whether this is true for citizens of her home town. Which hypothesis test would be most appropriate for … 
PsychologicaStatistics
Suggest one psychological research question that could be answered by each of the following types of statistical tests: z test t test for independent samples, and t test for dependent samples