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Masja [62]
3 years ago
8

L.B Jhonson middle school held a track and field event during the school year. The chess club sold various drink and snack items

for the participants and the audience. Altogether, they sold 486 items that totaled $2673. If each chess club sold each item for the same price, calculate the price of each item.
Mathematics
1 answer:
forsale [732]3 years ago
6 0

Answer:

$5.50

Step-by-step explanation:

you start by taking 2673 and then you have to divide that 486 and when you do that you get 5.5. Since that question states that each club sold each item for the same price then each item was sold for five dollars and fifty cents.

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Answer:

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Step-by-step explanation:

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3 years ago
The average heights of a random sample of 400 people from a city is 1.75 m. It is known that the heights of the population are r
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Answer:

The 95% confidence interval for the average heights of the population is between 1.7108m and 1.7892m.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

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Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, find M as such

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The 95% confidence interval for the average heights of the population is between 1.7108m and 1.7892m.

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