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Vlad [161]
1 year ago
13

Hello I need help on this math question​

Mathematics
1 answer:
Agata [3.3K]1 year ago
7 0

Answer:

A. 904.32 ft cubed

Step-by-step explanation:

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Here is a simple probability model for multiple-choice tests. Suppose that each student has probability p of correctly answering
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Answer:

a) The probability that Jodi scores 78% or lower on a 100-question test is 4%.

b) The probability that Jodi scores 78% or lower on a 250-question test is 0.023%.

Step-by-step explanation:

a) To approximate this distribution we have to calculate the mean and the standard distribution.

The mean is the proportion p=0.85.

The standard deviation can be calculates as:

\sigma=\sqrt{\frac{p(1-p)}{n} }= \sqrt{\frac{0.85*(1-0.85)}{100} }=0.04

To calculate the probability that Jodi scores 78% or less on a 100-question test, we first calculate the z-value:

z=\frac{p-p_0}{\sigma} =\frac{0.78-0.85}{0.04} =-1.75

The probability for this value of z is

P(x

The probability that Jodi scores 78% or lower on a 100-question test is 4%.

b) In this case, the number of questions is 250, so the standard deviation needs to be calculated again:

\sigma=\sqrt{\frac{p(1-p)}{n} }= \sqrt{\frac{0.85*(1-0.85)}{250} }=0.02

To calculate the probability that Jodi scores 78% or less on a 250-question test, we first calculate the z-value:

z=\frac{p-p_0}{\sigma} =\frac{0.78-0.85}{0.02} =-3.5

The probability for this value of z is

P(x

The probability that Jodi scores 78% or lower on a 250-question test is 0.023%.

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2 years ago
A triangle has side lengths of 7 centimeters, 5 centimeters, and c centimeters. Enter a value to complete the inequality that de
Rudiy27
It should be nine do you need to show work cause that's kinda hard to put it in words
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Step-by-step explanation:

Since the hypothesis is always the longest side of the triangle

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Answer:

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Anita text a photo of five Dolphins to a friend to five friends she asked each of her five friends to text the photo to 5 more f
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