Question

PSY - Assignment 3:ChiSquare Tests

Due by Sun, April 12th, at 11:30PM

Scores out of 25 points (13 points for Quest 1 and 12 points for Question 2)

Submit by uploading file(s) within "Assignment 3" on Canvas

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Remember that all assignments must reflect your own independent work

Question #1 (13 points)

Do people prefer cold drinks in summer and hot drinks in winter ? Use the following contingency table to determine whether there is a relationship between season and drink preference. Follow the 8 steps to hypothesis testing, based on alpha =.01.

Drink Preference

Season Chocolate Smoothie

Summer 5 30

Winter 23 17

Answer 1

The hypothesis being tested is:

H0: There is no relationship between season and drink preference

Ha: There is a relationship between season and drink preference

		Chocolate	Smoothie	Total
Summer	Observed	5	30	35
	Expected	13.07	21.93	35.00
	O - E	-8.07	8.07	0.00
	(O - E)² / E	4.98	2.97	7.95
Winter	Observed	23	17	40
	Expected	14.93	25.07	40.00
	O - E	8.07	-8.07	0.00
	(O - E)² / E	4.36	2.60	6.95
Total	Observed	28	47	75
	Expected	28.00	47.00	75.00
	O - E	0.00	0.00	0.00
	(O - E)² / E	9.34	5.56	14.90
		14.90	chi-square
		1	df
		.0001	p-value

The p-value is 0.0001.

Since the p-value (0.0001) is less than the significance level (0.01), we can reject the null hypothesis.

Therefore, we can conclude that there is a relationship between season and drink preference.

Please give me a thumbs-up if this helps you out. Thank you!