Help me verify answers by using SAS output

[JaeGonKim]

Hi Everyone,

I am learning SAS so I can not solve this example. I want to test it on SAS to help my students understand. Can you help me solve by using SAS the example below?

Thanks,

Jae

[Ksharp]

You can use nonparameter statistical method like resampling .

Check @Rick_SAS blog .

https://blogs.sas.com/content/iml/2014/11/21/resampling-in-sas.html

[JaeGonKim]

Hi Ksharp,

It is very difficult for me, please try to help me. If you can make SAS file and post it on here, I am really grateful to you.

Joe

[JaeGonKim]

It is very difficult for me, please try to help me. If you can make SAS file and post it on here, I am really grateful to you.

Joe

[Rick_SAS · Accepted solution]

You can use PROC TTEST to perform a one-sample test for the mean. You can use the SIDES=U option to perform a one-sided test and the H0= option to specify the value of the null hypothesis.  There is a Getting Started example in the PROC TTEST documentation that shows how to perform the test and analyze the results.

data Movie;
input rating @@;
datalines;
3 5 4 3 4 5 5 4 3 2 5 4 3 2 3 5
;

proc ttest data=Movie H0=4 sides=u alpha=0.05;
var rating;
run;

[Ksharp]

@Rick_SAS,

and I quoted "without using statistical software." .

[Rick_SAS]

The problem says "(a) through (c) without using software," which I assume the OP can do. The OP was asking about part (d), "Verify your answers by using SAS output."

[Ksharp]

Sure. Rick .

[JaeGonKim]

Hi Rich_SAS,

Thank you for your help.

Because SAS is quite new to me, could you send me a SAS file for this example and this results to email? My email is: jaegonkim.edu@gmail.com

Joe

[Rick_SAS]

The SAS code is posted in my response. You can copy and paste from this discussion thread.

[JaeGonKim]

Hi Rick_SAS,

Yes, thank you. Could you solve (a) to (c) without using software? I want to know the results are to make a comparison of them.

[Rick_SAS]

?? When you asked this question, you said you wanted to use SAS "to help my students understand," so I assumed you are a statistics teacher. This problem is solved in every elementary statistics textbook. I suggest you refer to the one that you are using for your class.Look in the chapter that discusses "tests of hypotheses" and the section that discusses "tests for the mean."

[JaeGonKim]

Hi Rick_SAS,

Sorry, I will review it. I would like to ask only another example about SAS. Are you ready to help me?

Thank you.

Joe

[JaeGonKim]

Hi Rick_SAS,

Sorry, I will review it. I would like to ask only another example about SAS. Are you ready to help me?

Thank you.

Joe

[Rick_SAS]

If it is a different question, please start a new thread.

There are many people on the forum who can help answer your questions about how to use SAS to analyze data and how to interpret SAS output. I am just one of hundreds of people who answer questions on this community.

[Ksharp]

I would like to give it a try.

a) H0 : mean=4  H1: mean>4

b) the statistic is the number of obs>4 , which is 5

c) due to 5/nobs = 0.312 , i.e.  0.3 > 0.05 which means can't refuse H0 .

d) from the output of proc ttest, can verify the above. You can't say mean at least 4.

SAS Output

均值	95% 置信限均值		标准差	95% 置信限标准差
3.7500	3.2834	正无穷	1.0646	0.7864	1.6476

自由度	t 值	Pr > t
15	-0.94	0.8188