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Novosadov [1.4K]
3 years ago
10

The scores on a test are normally distributed with a mean of 30 and a standard deviation of 6. Find the score that is one dash h

alf a standard deviation above the mean.
Mathematics
1 answer:
Mashcka [7]3 years ago
4 0

Answer:

Step-by-step explanation:

If it is asking for 1.5 standard deviations above the mean, it is 30 +1.5(6)=39

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30

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A plan for an executive travelers' club has been developed by an airline on the premise that 5% of its current customers would q
fgiga [73]

Answer:

Step-by-step explanation:

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4 0
3 years ago
If the first step in the solution of the equation -9 + x = 5x - 7 is "subtract x," then what would the next step be ?
lutik1710 [3]

Answer:

-1/2=x

Step-by-step explanation:

-9 + x = 5x - 7

     -x      -x

-9=4x-7

+7         +7

-2=4x

-2/4 =4x/4

-1/2=x

5 0
2 years ago
The weights of cars passing over a bridge have a mean of 3,550 pounds and
Dovator [93]

The approximate probability that the weight of a randomly-selected car passing over the bridge is more than 4,000 pounds is 69%

Option C is the correct answer.

<h3>What is Probability ?</h3>

Probability is defined as the study of likeliness of an event to happen.

It has a range of 0 to 1.

It is given in the question that

The weights of cars passing over a bridge have a mean of 3,550 pounds and standard deviation of 870 pounds.

mean  = 3550

standard deviation,  = 870

Observed value, X = 4000

Z = (X-mean)/standard deviation = (4000-3550)/870 = 0.517

Probability of weight above 4000 lb

= P(X>4000) = P(z>Z) = P(z> 0.517) = 0.6985

The approximate probability that the weight of a randomly-selected car passing over the bridge is more than 4,000 pounds is 69%

To know more about Probability

brainly.com/question/11234923

#SPJ1

6 0
2 years ago
12-2/3x=x-18 so how do you answer this question
vitfil [10]

Answer:

Step-by-step explanation:

I think I've already answered this question.

3 0
2 years ago
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