Chi-Square Analysis in JASP

Criterion: Use JASP for a chi-square analysis.

Data:Use the dataset yummy.jasp. Tandy's ice cream shop serves chocolate, vanilla, and strawberry ice cream. Tandy wants to plan for the future years. She knows that on average she expects to purchase 100 cases of chocolate, 75 cases of vanilla, and 25 cases of strawberry (4:3:1). This year, she purchased 133 cases of chocolate, 82 cases of vanilla, and 33 cases of strawberry. The dataset yummy.jasp is a record of ice cream sales this year.

Instructions: Complete the steps below.

1. Download yummy.jasp. Double-click the icon to open the dataset in JASP.
2. In the Toolbar, click Frequencies.In the menu that appears, under Classical,select Multinomial Test.
3. Select Flavor and then click the upper Arrow to send it over to the Factor box.
4. Select Frequency and then click the lower Arrow to send it over to the Counts box.
5. Click the circle next to Expected Proportions (²).
6. Fill in 4 for Chocolate, 1 for strawberry, and 3 for Vanilla.
7. Select the box for Descriptives and click the circle next to Proportions.
8. Copy and paste the output to the Word document.

Table 6

Multinomial Test
		df	p
H (a)		2.083		2		0.353
Descriptive
Flavor	Observed	Expected: H (a)
Chocolate		0.536		0.500
Strawberry		0.133		0.125
Vanilla		0.331		0.375

1. Answer this:Was Tandy's distribution of proportions the same as expected?