2 years ago

Help please I need help please

Mathematics

1 answer:

77julia77 [94]2 years ago

7 0

Sum every temperature of every month and divide it by the number of months, so 12

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A researcher wishes to estimate the proportion of X-ray machines that malfunction. A random 275 sample of machines is taken, and

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Following are the solution to the given question:

Step-by-step explanation:

$95\%$ Confidence Interval for both the percentage of all x-ray machines

p = the machinery's share is not working:

$= \frac{228}{275}\\\\ = 0.829$

$\text{Margin of Error} = Z_{(\frac{\alpha}{2})} \times \sqrt{( p \times (1-p)}{n})$

$= 1.96 \times \sqrt{(0.829 \times \frac{0.171}{275})} \\\\= 1.96 \times 0.023 \\\\= 0.045$

Lower $95\%$ Confidence interval = p - error margin $= 0.829 - 0.045 = 0.784$

Upper $95\%$ Confidence Interval = p + error margin $= 0.829 + 0.045 = 0.874$

So, $95\%$ Confidence Interval $= ( 0.78 , 0.87 )$

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The watermelons grown on a farm have normally distributed weights, with a mean weight of 80.1 ounces and a standard deviation of

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If g (2) = f (x) + k, what is the value of k?<br> O –12<br> 0 -8<br> O 12

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For every 1 girl in Mr hegarty’s class there are 2 boys. What is the ratio of girls to boys in the class? Give the answer in sim

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16. The weather report gives the temperature as 35 degrees Celsius. Find the

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Answer:

$F=95\°$

Step-by-step explanation:

we know that

$C=\frac{5}{9}(F\°-32)$

In this problem we have

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substitute the given value in the formula and solve for F

$35\°=\frac{5}{9}(F\°-32)$

$F-32=\frac{9}{5}(35)$

$F=\frac{9}{5}(35)+32$

$F=95\°$

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