3. EOC-Practice problem #1 Aa Aa A particular cell phone case is available in a

Question

3. EOC-Practice problem #1 Aa Aa A particular cell phone case is available in a choice of four different colors. A store sells all four colors. To test the hypothesis that sales are equally divided among the four colors, a random sample of 100 purchases is identified. Use the following table to answer the questions that follow. Upper-Tail Areas for Chi-Square Distributions Right-tail area df =1 df = 2 df = 3 df = 4 df = 5 df = 6 df = 7 df = 8 >0.100 0.100 0.095 0.090 0.085 0.080 0.075 0.070 0.065 0.060 0.055 0.050

Explanation / Answer

here for four covers ; degree of freedom =n-1=3 ; for 3 degree of freedom and 0.05 level critical value =7.81

1) as test statistic is less then critical value ; .... you would not reject the null hypotheiss.

for four covers ; degree of freedom =n-1=3 ; for 3 degree of freedom and 0.01 level critical value =11.34

2) as test statistic is less then critical value ; .... you would not reject the null hypotheiss.

for six covers ; degree of freedom =n-1=5 ; for 5 degree of freedom and 0.05 level critical value =11.07

3) as test statistic is higher then critical value ; .... you would reject the null hypotheiss.

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