According to an article in Marketing News, fewer checks are being written at the grocery store...

According to an article in Marketing News, fewer checks are being written at the grocery store checkout than in the past. To determine whether there is a difference in the proportion of shoppers who pay by check among three consecutive years at a 0.01 level of significance, the results of a survey of 500 shoppers in three consecutive years are obtained and presented below.

Check Written	YEAR
Check Written	YEAR 1	YEAR 2	YEAR 3
YES	230	170	140
NO	270	330	360

1=

What is the form of the null hypothesis?

		H₀:π₁ = π₂ ≠ π₃
		H0 :π1 ≠π2 ≠π3
		H₀:π₁= π₂ = π₃
		H0 :π1 ≠π2 = π3

2= what is the critical value ?

3=what is the value of the test statistic?

Expert Solution

by using the above chi square distribution table we got the critical value

orchestra answered 2 years ago

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