3 years ago

Help me please, Thanks

Mathematics

2 answers:

maks197457 [2]3 years ago

8 0

Count to 8 square is 60%

Irina-Kira [14]3 years ago

4 0

60% of 20 = 12

I hope this helps! :)

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Step-by-step explanation:

Given : Sample size : n= 64 , the sample is a large sample (n>30), so we can apply z-test.

Sample mean = $\overline{x}=200$

Standard deviation : $\sigma=48$

Level of confidence: $1-\alpha=0.95$

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Then, critical z-value = $z_{\alpha/2}=1.96$

The confidence interval to estimate the population mean is given by :_

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