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2 years ago

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please help please help please help please help please help please help please help please help please help please help please h

elp please help please help please help

1 answer:

Anna35 [415]2 years ago

4 0

ANSWER

1: 1/2

2: 4/9

3: 8

4: 5/18

5: Theo= What should happen

Exp= What actually happens

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There are 31 students in a math class. Of those, 15 students have in-line skates, 10 have scooters, and 12 have skateboards. Ove

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Apecar has the correct answer, I checked it

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3 years ago

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In the Journal of Shell and Spatial Structures (December 1963), environmental researcher Vivek Ajmani studied the performance of

igomit [66]

Answer:

The standard deviation of the load distribution is of 5102.041 pounds.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

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

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

$\mu = 20000$

Also, the probability that the load is between 10,000 and 30,000 pounds is 0.95.

10,000 pounds and 30,000 pounds are equidistant from the mean. Due to this, and the probability of 0.95 of having a value in this range, 10000 is the (100-95)/2 = 2.5th percentile and 30000 is the (100+95)/2 = 97.5th percentile. Applying one of them, we find the standard deviation.

30,000 is the 97.5th percentile:

This means that when X = 30000, Z has a pvalue of 0.975. So when X = 30000, Z = 1.96. Then

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

$1.96 = \frac{30000 - 20000}{\sigma}$

$1.96\sigma = 10000$

$\sigma = \frac{10000}{1.96}$

$\sigma = 5102.041$

The standard deviation of the load distribution is of 5102.041 pounds.

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4 years ago

Need help with math test ASAP please

MaRussiya [10]

Answer:

stop cheating on your tests

Step-by-step explanation:

Brainly is not meant for cheating

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3 years ago

Decide which item is the better purchase in the scenario below.

Andrews [41]

The 3oz is better than the 20

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3 years ago

I need help quick please help me thnak you

quester [9]

Answer:

28 numbers

Step-by-step explanation:

There is a distance of 81 between -0.5 and 80.5. Divide this number by 3, since you are only counting every third number and you will get 27, but you need to count the first number, which has been excluded. Add one more to get the answer, 28.

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3 years ago