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ASHA 777 [7]
2 years ago
13

You have 2 different savings accounts. For Account​ A, the simple interest earned after 18 months is ​$8.33. For Account​ B, the

simple interest earned after 15 months is ​$13.75. If the interest rate is ​3.7% for Account A and ​2.2% for Account​ B, how much is the principal in each​ account? Which account earned you the most interest the first​ month? Explain your answer.
Mathematics
1 answer:
Afina-wow [57]2 years ago
5 0

Answer:

the principal would earn about 25-50 cents per month on account b and earn,about 2-10 cents on account A, and account b earns you the most and has the most interest.

Step-by-step explanation:

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A factory that manufactures bolts is performing a quality control experiment. Each object should have a length of no more than 1
xeze [42]

The test statistic z  is 2.33, the p-value corresponding to the test statistic z value is 0.0099.

<h3>What is Probability?</h3>

Probability is the measure of the likeliness of happening of an event.

The mean of the data is 15.07 centimeters

The standard deviation of the data is 0.26 centimeters.

n = 75

Significance Level ∝ = 0.01

According to the null and alternative hypothesis

Hₐ : \rm \mu ≤15  vs H₁ : \rm \mu >15

The test statistic z  is given by

\rm Z = \dfrac{(X-\mu)}{\sigma/\sqrt{n}}

Z = ( 15.07 -15)/(0.26/√75)

Z = 2.33

The p-value corresponding to z value is 0.0099

as p-value < significance level, therefore the H₁ : \rm \mu >15 is acceptable.

No, significant evidence is not present to tell that the length of bolts is actually greater than the mean value at a significance level of 0.01.

To know more about Probability

brainly.com/question/11234923

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