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3 years ago

Alina, Robert, and Makayla are on the student council at their high school.

Mathematics

2 answers:

lianna [129]3 years ago

5 0

Answer:

B. Write each student's name on a slip of paper and put the slips in a

bag. Randomly draw a slip of paper. The student whose name is

on the paper wins.

C. Roll a number cube. If it lands on 1 or 3, Alina wins. If it lands on 2

or 4, Robert wins. If it lands on 5 or 6, Makayla wins.

Step-by-step explanation:

Alekssandra [29.7K]3 years ago

3 0

Answer: D B

Step-by-step explanation:

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3 years ago

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anygoal [31]

Answer:

Step-by-step explanation:

As per circle theorem rule, ∠GDE is twice than ∠GFE

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3 years ago

A random sample of 56 lithium batteries has a mean life of 645 hours with a population standard deviation of 31 hours. Compute t

bearhunter [10]

Answer: A. (636.9, 653.1)

Step-by-step explanation:

Given : Sample size : n=56

Significance level : $\alpha: 1-0.95=0.05$

Critical value : $z_{0.05}=1.96$

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Standard deviation : $\sigma= 31\text{ hours}$

The 95% confidence interval for population mean is given by :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=645\pm (1.96)\dfrac{31}{\sqrt{56}}\\\\=645\pm8.1\\\\=(636.9, 653.1)$

Hence, 95% confidence interval for population mean is (636.9, 653.1).

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3 years ago

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Rufina [12.5K]

Answer:

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Step-by-step explanation:

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