Questions: Churning, the loss of customers to a competitor, is especially a problem for telecommunications companies. Market researchers at a telecommunications company collect data from a sample of 5,526 subscribers. Of 2,750 basic subscribers selected, 868 churned in the last month. Of 2,776 premium subscribers selected, 856 churned in the last month. Complete parts (a) through (c). a. At the 0.05 level of significance, is there evidence of a difference in the proportion of basic and premium subscribers who churned? Let group 1 be the basic subscribers, and let group 2 be the premium subscribers. State the null and alternative hypotheses. Choose the correct answer. A. H0: π1 = π2 B. H0: π1 ≠ π2 H1: π1 ≠ π2 C. H0: π1 ≥ π2 D. H0: π1 < π2 H1: π1 < π2 H1: π1 ≥ π2 E. H0: π1 > π2 F. H0: π1 ≤ π2 H1: π1 ≤ π2 H1: π1 > π2
Transcript text: Churning, the loss of customers to a compettor, is especially a problem for telecommunications companies Market researchers at a telecommunications company collect data from a sample of 5,526 subscribers. Of 2,750 basic subscribers selected, 868 churned in the last month Of 2,776 premum subscribers selected, 856 churned in the last month Complele parts (a) through (c)
a. At the 0.05 level of significance, is there evidence of a difference in the proportion of basic and premium subscribers who churned?
Let group 1 be the basic subscribers, and let group 2 be the premium subscribers. State the null and alternative hypotheses Choose the correct answer.
A. $H_{0} \pi_{1}=\pi_{2}$ B. $H_{0} \pi_{1} \neq \pi_{2}$ $H_{1}: \pi_{1} \neq \pi_{2}$ $H_{1} \pi_{1}=\pi_{2}$
C. $H_{0} \pi_{1} \geq \pi_{2}$ D. $H_{0} \pi_{1}<\pi_{2}$ $H_{1} \pi_{1}<\pi_{2}$ $H_{1} \pi_{1} \geq \pi_{2}$
E. $H_{0} \cdot \pi_{1}>\pi_{2}$ F. $H_{0} \pi_{1} \leq \pi_{2}$ $\mathrm{H}_{1} \pi_{1} \leq \pi_{2}$ $H_{1} \pi_{1}>\pi_{2}$
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