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STatiana [176]
3 years ago
7

The blueprint for the Daly Daly​'s living room has a scale of 2 inches=3 feet. The family wants to use a scale of 1 inch equals

= 5 feet. What is the width of the living room on the new​ blueprint?
Mathematics
1 answer:
denpristay [2]3 years ago
7 0

Answer:

5X ft

Step-by-step explanation:

Given the new scale of 1 inch equals = 5 feet

let X denote the width of the living room on the blueprint.

To find the width of the living room:

Width=Blueprint \ Dimensions \times scale\\\\=X times 5ft\\\\=5X \ ft

Hence the living room has a width of 5X ft

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Answer:

(0.582-0.485) - 1.64 \sqrt{\frac{0.582(1-0.582)}{144796} +\frac{0.485(1-0.485)}{211693}}=0.0942  

(0.582-0.485) + 1.64 \sqrt{\frac{0.582(1-0.582)}{144796} +\frac{0.485(1-0.485)}{211693}}=0.09978  

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Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

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\hat p_A =\frac{84199}{144796}=0.582 represent the estimated proportion female for biology

n_A=144796 is the sample size for A

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z represent the critical value for the margin of error  

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p \sim N(p,\sqrt{\frac{p(1-p)}{n}})  

The confidence interval for the difference of two proportions would be given by this formula  

(\hat p_A -\hat p_B) \pm z_{\alpha/2} \sqrt{\frac{\hat p_A(1-\hat p_A)}{n_A} +\frac{\hat p_B (1-\hat p_B)}{n_B}}  

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