The standard deviation for SAT tests is known to be 100. Zoe takes a sample of 64 people and calculates a 99% confidence interval. How big is her margin of error

32.2

Step-by-step explanation:

Margin of Error = Zcritical * √(σ² / n)

σ = standaed deviation. ; sample size = 64

α = 99%

Zcritical at 99% confidence interval = 2.576

Margin of Error = 2.576 * √(100^2/64)

Margin of Error =2.576* 100/8

Margin of error = 2.576 * 12.5

= 32.2

the expression (1.26)2t reveals the approximate rate of increases in the number of plants semiannually.

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step-by-step explanation:

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