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3 years ago

Question 7 = 2 Points

Mathematics

1 answer:

anastassius [24]3 years ago

8 0

Answer:

See below

Step-by-step explanation:

The budget is $600.

Samantha spends the following amount:

399.95 + 3*7.01 + 34.06 = 455.04

Now, she plans to buy w outfits which cost $75.88 each.

The inequality for this is:

455.04 + 75.88w ≤ 600

Solving this we get:

75.88w ≤ 600 - 455.04
75.88w ≤ 144.96
w ≤ 144.96 / 75.88
w ≤ 1.91

w = 1 is the only integer solution greater than zero

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4 years ago

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3 years ago

According to the 2011 National Survey of Fishing, Hunting, and Wildlife-Associated Recreation, there were over 71 million wildif

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Answer:

The probability that between 79% and 81%of the 500 sampled wildlife watchers actively observed mammals in 2011 is P=0.412.

Step-by-step explanation:

We know the population proportion π=0.8, according to the 2011 National Survey of Fishing, Hunting, and Wildlife-Associated Recreation.

If we take a sample from this population, and assuming the proportion is correct, it is expected that the sample's proportion to be equal to the population's proportion.

The standard deviation of the sample is equal to:

$\sigma_s=\sqrt{\frac{\pi(1-\pi)}{N}}=\sqrt{\frac{0.8*0.2}{500}}=0.018$

With the mean and the standard deviaion of the sample, we can calculate the z-value for 0.79 and 0.81:

$z=\frac{p-\pi}{\sigma}=\frac{0.79-0.80}{0.018} =\frac{-0.01}{0.018} = -0.55\\\\z=\frac{p-\pi}{\sigma}=\frac{0.81-0.80}{0.018} =\frac{0.01}{0.018} = 0.55$

Then, the probability that between 79% and 81%of the 500 sampled wildlife watchers actively observed mammals in 2011 is:

$P(0.79$

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3 years ago