According to IDC, Apple's share of the smartphone market was 40% during a recent quarter. A random sample of 90 smartphone users was selected. The standard error of the proportion is __________ .
A)0.0337
B)0.0160
C)0.0517
D)0.1034

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The Answer of According to IDC, Apple's share of the smartphone market was 40% during a recent quarter. A random sample of 90 smartphone users was selected. The standard error of the proportion is __________ .
A)0.0337
B)0.0160
C)0.0517
D)0.1034

According to IDC, Apple's Share of the Smartphone Market Was