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3 years ago

HELP ME NOW PLEASE 100 POINTS

Mathematics

1 answer:

vampirchik [111]3 years ago

8 0

Answer:

43.5 in^2

Step-by-step explanation:

The area of a trapezoid is given by

A = 1/2 ( b1+b2) h where b1 and b2 are the lengths of the bases and h is the height

We need to change 1 1/4 ft to inches = 1.25 (12) = 15 inches

A = 1/2 ( 15+14) 3

A = 1/2(29)*3

43.5 in^2

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MakcuM [25]

Full Question:

The data show systolic and diastolic blood pressure of certain people. Find the regression equation, letting the first variable be the independent (x) variable. Find the best predicted diastolic pressure for a person with a systolic reading of 113. use a significance level of 0.05.

Systolic| 150 129 142 112 134 122 126 120

Diastolic| 88 96 106 80 98 63 95 64

a. What is the regression equation?

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Answer:

A. yhat = a + bx = -10.64 + 0.75x

B. 74.0

Step-by-step explanation:

A. To find the regression equation here, we apply the formulas and then apply it to find the value of y given value of x:

calculate xbar and ybar which is the average of the variables:

Where n(number of values in x or y)=8

xbar = sum of x/n = 129.375

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x=84 \times 5 \\
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$\frac{420+y}{6}=85 \\
420+y=85 \times 6 \\
420+y=510 \\
y=510-420 \\
y=90$

You need to score 90 points on the sixth test.

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