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Mathematics, 21.12.2019 05:31 abee122
Aproduct developer wants to determine if there is a difference in the proportion of people who have a specific brand of smart phone in the u. s. and poland. a sample of 10,500 people in the u. s. was obtained and 3,000 reported that they owned the type of smart phone in question. in poland, 5,000 people were surveyed and 1,250 said they owned the smart phone. the developer knows that a z-test for two population proportions is needed to analyze the data but is not sure how to calculate it and he turns to you for . based upon the information provided, what is the value of z
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