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miv72 [106K]
2 years ago
14

Stacey has a part-time job at the bike shop. She saves $100 every four weeks for a new car. Find her rate of change After four w

eeks, she will have $ After 12 weeks , she will have $ per week Stacey's rate of change is $
Mathematics
1 answer:
Lelu [443]2 years ago
8 0

Answer:

She will have $25 per week Stacey's rate of change is $25.

She will have $300 After 12 weeks.

Step-by-step explanation:

Given : Stacey has a part-time job at the bike shop. She saves $100 every four weeks for a new car.

To find : Her rate of change After four weeks, she will have $ After 12 weeks , she will have $ per week Stacey's rate of change is $ ?

Solution :

In every four weeks she saves $100.

In every one week she save \frac{\$100}{4}.

In every one week she save $25.

After 12 week she save \$25\times 12.

After 12 week she save $300.

The rate of change is r=\frac{100-25}{4-1}

r=25

She will have $25 per week Stacey's rate of change is $25.

She will have $300 After 12 weeks.

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c) For this case we see that both confidence intervals contains the value of 0.12 so then we can't conclude that only one group is referenced at the significance level of 0.05 used.

Step-by-step explanation:

Part a

The estimated proportion of women with cosmetic dermatitis from using eye shadow is given by:

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The confidence  interval is at 95% of confidence, our significance level would be given by \alpha=1-0.95=0.05 and \alpha/2 =0.025. And the critical value would be given by:

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0.0916 - 1.96\sqrt{\frac{0.0916(1-0.0916)}{131}}=0.0422

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For this case we see that both confidence intervals contains the value of 0.12 so then we can't conclude that only one group is referenced at the significance level of 0.05 used.

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