1. (50%) The goal of the study is to compare numerical measurement of body condition (cond) between two different age groups. Answer questions based on the SPSS outputs.

Independent samples t test Group Statistics
	age	N	Mean	Std. Deviation	Std. Error Mean
	older	31	43.81	4.423	.794
younger	41	44.71	3.502	.547

	Levene's Test for Equality of Variances	t-test for Equality of Means
F	Sig.	t	Sig. (2-tailed)
cond	Equal variances assumed	1.960	.0456	-1.865	.0438
Equal variances not assumed			-1.734	.0524

Paired sample t test:

	t	Sig. (2-tailed)
pair 1	younger -older	2.213	.044

1. Choose the correct t test - put a check in for your answer

Paired sample t test
Independent t test

1. State the hypotheses if you intend to prove that younger age group has a higher (which means better) mean body condition than the older age group.

1. Find t and p-value of the test.

1. State your decision (in statistical language)

1. What is your conclusion in English?

1. (50%) To compare drug effects of two drugs that were developed to reduce sugar level, a group of volunteers were recruited (view that as a random sample). The researcher ask each volunteer to use one of the two drug in the first time of taking a drug, and use the other drug when the second time a drug is used. The amount of sugar reduction were recorded as the initial measure minus the sugar measure after one hour of using the corresponding drugs.

Paired samples t test:

	t	df	Sig. (2-tailed)
pair 1	sugarA-sugarB	-2.213	27	.0510

Independent samples t test Group Statistics

	drug	N	Mean	Std. Deviation	Std. Error Mean
sugar	A	31	13.81	4.423	.794
B	41	14.71	3.502	.547

	Levene's Test for Equality of Variances	t-test for Equality of Means
F	Sig.	t	df	Sig. (2-tailed)
sugar	Equal variances assumed	1.960	.366	-1.965	27	.0638
Equal variances not assumed			-1.934	25.779	.0754

1. Choose the correct test

1. State the hypotheses if you intend to prove that Drug A is better

1. Find p-value of the test

1. State your decision

1. What is your conclusion in a sentence?