Cross Tabulation & Hypothesis Testing - Short Assignment

Cross Tabulation Question:

Examine the cross-tabulation table below. Identify the independent variable and dependent variable (i.e. - which variable do you expect to have an effect on the other variable). Calculate the appropriate percentages for each cell. Based on the chi square statistic below state whether an association exists between the two variables, and if so how can you describe that association?

	Female	Male	Row Total
Tried Mexican Coca-Cola	30	120	150
Never Tried Mexican Coca-Cola	90	60	150
Column Total	120	180	300

Calculated?² (Chi-square) statistic = 16.66

Critical?² (Chi-square) (@ .05 w/ 1 degree of freedom) = 3.84

Hypothesis Testing Question:

Samsung is researching whether to introduce a new type of mobile phone. If more than 65% of the population likes the plan then they will introduce it. Define the null and alternative hypotheses in this situation. Should this be a one-tailed or two-tailed test? Why? What is the critical Z value that should be used? Given the data below should the null hypothesis be rejected? What marketing action should Samsung take, if any?

Test Statistic Z (calculated) =

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