A cellphone provider has the business objective of wanting to determine the proportion of subscribers who would upgrade to a new cellphone with improved features if it were made available at a...


A cellphone provider has the business objective of wanting to determine the proportion of subscribers who would upgrade to a new cellphone with improved features if it were made available at a substantially reduced cost. Data are collected from a random sample of 600 subscribers. The results indicate that 149 of the subscribers would upgrade to a new cellphone at a reduced cost. Reducing the price will be profitable if at least 20% of the subscribers would upgrade.


At the 0.05 level of​ significance, is there evidence that more than 20% of the customers would upgrade to a new cellphone at a reduced​ cost?


Determine the null​ hypothesis, H0​, and the alternative​ hypothesis, H1.




A. H0​: P≤0.20 H1​: P>0.20





B. H0​: P=0.20 H1​: P≠0.20





C. H0​: P≠0.20 H1​: P=0.20





D. H0​: P≥0.20 H1​: P<>


ZStat=__

p-value=__


__A__ the null hypothesis. There __B__ sufficient evidence that the percentage of people who would upgrade to a new cellphone at a reduced cost is __C__ 20%.


A: Reject or do not reject

B: is or is not

C: different from, less than, greater than



How would the manager in charge of promotional programs concerning cellphone upgrades use the results in​ (a)?


The manager __A__ suggest reducing the price.


A: should or should not





Jun 03, 2022
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