Mathematics, 10.05.2021 21:00 Athenax

A company that sells phones has received complaints from customers that their certain new types of phones cracks at a temperature of over 38⁰C. they decide to test sample of 100 phones by putting them at this temperature. the sample tests revealed that 30% of the phones cracked. because the company did not test all this type of phones due to potential destructive testing, they are interested in using the sample test to estimate the results had all phones been tested a how many phones should have been tested for the percentage of phones that cracked to be within +-4% with a 95% confidence interval?

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A company that sells phones has received complaints from customers that their certain new types of p...