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Alexus [3.1K]
4 years ago
6

Why do people shake hands Why do we shake hands when we meet someone

Health
2 answers:
expeople1 [14]4 years ago
5 0

Answer:

Its a friendly greeting

Yanka [14]4 years ago
3 0

Answer:

to greet them

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3 years ago
The mean pulse rate​ (in beats per​ minute) of adult males is equal to 69 bpm. For a random sample of 166 adult​ males, the mean
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Answer: -0.4862

Explanation:

Given : The mean pulse rate​ (in beats per​ minute) of adult males\mu=69\text{ bpm}

For sample : Size = n=166

Mean : \overline{x}=68.6\text{ ppm}

Standard deviation : \sigma=10.6\text{ bpm}

We assume that its a normal distribution , since the sample size is large (>30) then test applied here is z-test .

The formula to calculate the z-statistic is given by :-

z=\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}

\Rightarrow\ z=\dfrac{68.6-69}{\dfrac{10.6}{\sqrt{166}}}=-0.486192404782\approx-0.4862

Hence, the value of the test statistic = -0.4862

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