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Andrej [43]
2 years ago
8

Pls solve question 8c, i will mark branliest

Mathematics
1 answer:
Law Incorporation [45]2 years ago
5 0

Answer:

a = -1

Step-by-step explanation:

first you make the x 0 and the y 0

0 = (0 - 1)^2 + a

0 = (-1)^2 + a

then you deal with the exponent

0 = 1 + a

lastly you subtract everything by 1

-1 = a

a = -1

that is your answer

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The mean height of women in a country (ages 20-29) is 64 4 inches A random sample of 50 women in this age group is selected What
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0.0721 = 7.21% probability that the mean height for the sample is greater than 65 inches.

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To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

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Central Limit Theorem

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For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Mean of 64.4 inches, standard deviation of 2.91

This means that \mu = 64.4, \sigma = 2.91

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This means that n = 50, s = \frac{2.91}{\sqrt{50}}

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Z = \frac{X - \mu}{\sigma}

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Z = 1.46

Z = 1.46 has a p-value of 0.9279

1 - 0.9279 = 0.0721

0.0721 = 7.21% probability that the mean height for the sample is greater than 65 inches.

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