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1. Claim: Fewer than 92​% of adults have a cell phone. In a reputable poll of...

1. Claim: Fewer than 92​% of adults have a cell phone. In a reputable poll of 1243 ​adults, 87​% said that they have a cell phone. Find the value of the test statistic.

2. Claim: The mean pulse rate​ (in beats per​ minute) of adult males is equal to 69 bpm. For a random sample of 135 adult​ males, the mean pulse rate is 69.2 bpm and the standard deviation is 11.2 bpm. Find the value of the test statistic.

3. ​Claim: Most adults would erase all of their personal information online if they could. A software firm survey of 597 randomly selected adults showed that 60% of them would erase all of their personal information online if they could. Find the value of the test statistic.

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Math   Statistics-And-Probability   
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