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dusya [7]
2 years ago
11

The standard distance that has to be travelled by a rocket in 1 second is 7.9 km. A new rocket is built for a space expedition b

ut the distance that can be travelled by the new rocket in an hour is only 3.75 10 km.
(i) What is the standard distance, in km, that has to be travelled by a rocket in an hour?

(ii) What is the difference between the distance that can be travelled by the new rocket and the standard distance required in an hour?​
Mathematics
1 answer:
jeka57 [31]2 years ago
7 0

Step-by-step explanation:

What is the difference between the distance that can be travelled by the new rocket and the standard distance required in an hour?

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Of 136 randomly selected adults, 33 were found to have high blood pressure. Construct a 95% confidence interval for the true of
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Answer:

The 95% confidence interval of the proportion of all adults that have high blood pressure is 0.17059 < \hat{p} < 0.314695

Step-by-step explanation:

The confidence interval for a proportion is given by the following formula;

CI=\hat{p}\pm z\times \sqrt{\frac{\hat{p}(1-\hat{p})}{n}}

Where:

x = 33

n = 136

\hat{p} = x/n = 33/136 = 0.243

z value for 95% confidence is 1.96

Plugging in the values, we have;

CI=0.243\pm 1.96\times \sqrt{\frac{0.243(1-0.243)}{136}}

Which gives;

0.17059 < \hat{p} < 0.314695

Hence the 95% confidence interval of the proportion of all adults that have high blood pressure = 0.17059 < \hat{p} < 0.314695

From the above we have;

23.2 < x < 42.798

Since we are dealing with people, we round down as follows;

23 < x < 42.

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