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chubhunter [2.5K]
2 years ago
11

Evaluate: 71 − b, if b is 27.

Mathematics
2 answers:
LUCKY_DIMON [66]2 years ago
7 0
Evaluate: 71-b, if b is 27 the answer is 44
Dvinal [7]2 years ago
4 0

Hii!

__________________________________________________________

\leadsto\mid\boldsymbol{Answer.}\mid\gets

<em>Value of the expression = 44</em>

_________________________________________________________

\leadsto\mid\boldsymbol{Explanation.}\mid\gets

SUBSTITUTE the value of b for b.

\sf 71-27}

PERFORM subtraction.

\sf 44\qquad\bullet

_________________________________________________________

Hope that this helped! Best wishes.

\textsl{Reach far. AIm high. Dream big.}

\boldsymbol{-Greetings!-}

________________________________________________________

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Answer:

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Step-by-step explanation:

For this case the estimated proportion of people who responded that they have a plan to buy one electric car is given by:

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We know that the confidence level for this case is 96% of confidence, then our significance level would be \alpha=1-0.96=0.04 and \alpha/2 =0.02. And the critical value would be:

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The confidence interval for the true proportion is given by this expression:  

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Replacing the data given we got:

0.212 - 2.05\sqrt{\frac{0.212(1-0.212)}{85}}=0.121

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We have 96% of confidence that the true proportion of people who responded that they have a plan to buy one electric car is between (0.121 and 0.303).

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