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Allushta [10]
3 years ago
15

Management of a particular golf course wants to know what the average score is for their course. It is known that from previous

games that the standard deviation of the golf scores is 4.5. To estimate the average score, the managers took a random sample of 50 golfers and found that it has a mean of 70, Use a 95% confidence interval (CI) to estimate the true average score of golfers on this particular course. a.70 (1.645)4.5/S0) O b. 701 ( 1 .96)(4.5) ? ?. 70 (1.96)(4.5 /V50) od. cannot compute
Mathematics
1 answer:
babunello [35]3 years ago
6 0

Answer: c. 70\pm (1.96)\dfrac{4.5}{\sqrt{50}}

Step-by-step explanation:

The confidence interval for population mean is given by :-

\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}

, where n= sample size

\overline{x} = sample mean.

z*= Critical value.

\sigma= population standard deviation.

As per given , we have

n= 50

\sigma=4.5

\overline{x}=70

Also, we know that the critical value for 95% confidence interval : z*= 1.96

Then, the 95% confidence interval (CI) to estimate the true average score of golfers on this particular course will be :

70\pm (1.96)\dfrac{4.5}{\sqrt{50}} (substitute all the value in the above formula.)

Hence, the correct option is c. 70\pm (1.96)\dfrac{4.5}{\sqrt{50}}

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By Sine Rule,

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The rate of change in the temperature T of coffee at time t is proportional to the difference between the temperature M of the a
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Answer:

T'(t)=k(M(t)-T(t))

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Saying that the rate of change in the temperature T is proportional to the difference between M and T is just a way of saying that the rate of change in the temperature T is equal to the difference between M and T, multiplied by some constant k (whose value we don't know, but still that's what it means).

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7 0
3 years ago
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olasank [31]

area = 44.0467 \: cm {}^{2}

<h3>step by step explanation </h3>

● area of regular polygon Formulas ,

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● now finding the area of regular polygon,

⟹\frac{4 {}^{2} \times 8 }{ 4 \: tan \:  \binom{180}{5} }

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Hope it's helps you

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3 years ago
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