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3 years ago

12

10x is greater than or equal to 120 cm^2

1 answer:

Agata [3.3K]3 years ago

8 0

Answer:

x greater than or equal to 12cm^2

Step-by-step explanation:

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Ivan

Answer: $\pm0.1706$

Step-by-step explanation:

Given : Sample size : n= 33

Critical value for significance level of $\alpha:0.05$ : $z_{\alpha/2}= 1.96$

Sample mean : $\overline{x}=2.5$

Standard deviation : $\sigma= 0.5$

We assume that this is a normal distribution.

Margin of error : $E=\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

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AlexFokin [52]

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Step-by-step explanation:

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Answer: see below

Step-by-step explanation:

(i)

200/2 = 100

Find 100 on cumulative frequency and the correspinding time: 14 minutes. So the answer is 14 minutes.

(ii)

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Find the difference: 150 - 50 = 100

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