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Zina [86]
2 years ago
7

Is it A, B, C or D? (30 points)

Mathematics
1 answer:
OLEGan [10]2 years ago
8 0

Answer:

B because you’re reflecting it on the x axis.

Hope this helped and brainliest please

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6. A bank auditor claims that credit card balances are normally distributed, with a mean of $3570
sergejj [24]

Answer:

Probability that their mean credit card  balance is less than $2500 is 0.0073.

Step-by-step explanation:

We are given that a bank auditor claims that credit card balances are normally distributed, with a mean of $3570  and a standard deviation of $980.

You randomly select 5 credit card holders.

Let<em> </em>\bar X<em> = </em><u><em>sample mean credit card balance</em></u>

The z score probability distribution for sample mean is given by;

                                Z =  \frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }  ~ N(0,1)

where, \mu = population mean credit card balance = $3570

            \sigma = standard deviation = $980

            n = sample of credit card holders = 5

Now, the probability that their mean credit card  balance is less than $2500 is given by = P(\bar X<em> </em>< $2500)

    P(\bar X<em> </em>< $2500) = P( \frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } } < \frac{2500-3570}{\frac{980}{\sqrt{5} } } ) = P(Z < -2.44) = 1 - P(Z \leq 2.44)

                                                               = 1 - 0.9927 = 0.0073

The above probability is calculated by looking at the value of x = 2.44 in the z table which has an area of 0.9927.

Therefore, probability that their mean credit card  balance is less than $2500 is 0.0073.

4 0
2 years ago
PLS HELP! WILL GIVE BRAINLIEST!!<br> 2x-3/4 + x = 2x+3/2 + 9
Molodets [167]

Answer:

11 1/4

Step-by-step explanation:

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Y½ × 4y¼<br><br>I want help!!​
irina1246 [14]

Answer: 5 1/4

Step-by-step explanation:

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Two number cubes are rolled and the results are added. What is the probability that the sum is equal to 2?
vodomira [7]

Answer:

Well, assuming that these are cubes labeled 1-6, there is a 1/12 chance of the sum equaling 2, since they would both have to land on 1

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Write that number as a decimal?
pshichka [43]
Hmm a number as. a decimal is 1/2=0.50
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3 years ago
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