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Margarita [4]
2 years ago
5

HELPPP ASAPPPPPPPPPPP

Mathematics
1 answer:
makkiz [27]2 years ago
5 0

I can't see it can you retake the picture please so I can try to help if I know it?

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Suppose ARB Bank is reviewing its service charges and interest payment policies on current accounts. Suppose further that ARB ha
Advocard [28]

Answer:

5.94% of customers carries a balance of GH¢100 or lower.

82.64% of customers carries a balance of GH¢500 or lower.

0% of current account customers carries average daily balances exactly equal to GH¢500.

76.7% of customers maintains account balance between GH¢100 and GH¢500

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 = 350, \sigma = 160

What percentage of customers carries a balance of GH¢100 or lower?

This is the pvalue of Z when X = 100. So

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

Z = \frac{100 - 350}{160}

Z = -1.56

Z = -1.56 has a pvalue of 0.0594

5.94% of customers carries a balance of GH¢100 or lower.

What percentage of customers carries a balance of GH¢500 or lower?

This is the pvalue of Z when X = 500.

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

Z = \frac{500 - 350}{160}

Z = 0.94

Z = 0.94 has a pvalue of 0.8264

82.64% of customers carries a balance of GH¢500 or lower.

What percentage of current account customers carries average daily balances exactly equal to GH¢500?

In the normal distribution, the probability of finding a value exactly equal to X is 0. So

0% of current account customers carries average daily balances exactly equal to GH¢500.

What percentage of customers maintains account balance between GH¢100 and GH¢500?

This is the pvalue of Z when X = 500 subtracted by the pvalue of Z when X = 100.

From b), when X = 500, Z = 0.94 has a pvalue of 0.8264

From a), when X = 100, Z = -1.56 has a pvalue of 0.0594

0.8264 - 0.0594 = 0.767

76.7% of customers maintains account balance between GH¢100 and GH¢500

5 0
3 years ago
Please help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
erma4kov [3.2K]

Step-by-step explanation:

so option 1 is rightttt

5 0
2 years ago
a 24 foot tall tree cast a 30 foot long. a 4 foot tall child is standing nearby how long is the child's shadow
kotykmax [81]
You put it in a ratio so it's 24/30 = x/4 so the answer is 3.2 feet
7 0
3 years ago
Read 2 more answers
What is the value of x? 6 8 10 12
oee [108]

Answer:

Its 8

Step-by-step explanation:

8 0
3 years ago
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There are four students in each small reading group there are 24 students in all.
MrRissso [65]

There are 6 reading groups

24 students ÷ 4 students each group= 6 reading groups

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3 years ago
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