STA 205 Study Guide - Quiz Guide: Statistical Hypothesis Testing, Test Statistic, Confidence Interval
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A large, public university wants to estimate the proportion of its students that own an iphone in order to determine if a majority of students have this type of smartphone. Classify the variable as categorical or quantitative. (3 pts) I\ll -\re t~0 a\- -th1~ hf(j", "()"1>\ic, u"oi\lfxsi {: estimate the percentage of students at this university who carry an iphone with 95% confidence. (13 pts) "i ~ n f\;; 117-- l =: 1. 9g. ~~ g; -16/. ard ~ . 39 1 o~ 5\-ud~ own ~n wrtvle. Does the interval found in part b provide evidence that a majority (more than 50%) of students carry an iphone ? (4 pts) No, it does not support this claim fu ccy\[1derce: ,~ vi\ is c}let f;j;. ,at ih l "ier \ ,m 1-\- fl: a marketing executive tested incentives to see what percentage of customers would enroll in a new web-based loyalty program.
