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2 years ago

I report if u guess. A 98% confidence interval for a proportion is found to be (0.32, 0.38). What is the sample proportion?

Mathematics

1 answer:

JulsSmile [24]2 years ago

4 0

Answer:

Step-by-step explanation:

Sample proportional is right at the centre of the interval

p = (0.32+0 38)/2

0.7/2

0.35

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Number 18.

Rashid [163]

f(x) = -5/2x + 4

f(3) = (-5/2)(3) + 4

f(3) = -15/2 + 4

f(3) = -7.5 + 4

f(3) = -3.5

Answer: B. –3.5

4 0

3 years ago

HELP PLEASE

Maurinko [17]

$\bf \cfrac{x^2-x-42}{x-6}\implies \cfrac{(x+7)\underline{(x-6)}}{\underline{x-6}}\implies x+7$

so.. the left-hand-side does indeed simplify to x+7, so the equation does check out.

however, notice something, for the equation of x+7, when x = 6, we get (6) + 7 which is 13.

BUT for the rational, we get $\bf \cfrac{x^2-x-42}{x-6}\qquad \boxed{x=6}\implies \cfrac{x^2-x-42}{\boxed{6}-6}\implies \stackrel{und efined}{\cfrac{x^2-x-42}{0}}$

so, even though the siimplification is correct, the rational or original expression is constrained in its domain.

6 0

3 years ago

4. The system of equations 3x – 6y = 20 and 2x – 4y = 3 is

expeople1 [14]

3x - 6y = 20
-6y = -3x + 20
y = 1/2x - 20/6.....slope = 1/2...y int = -20/6 = -10/3

2x - 4y = 3
-4y = -2x + 3
y = 1/2x - 3/4..slope = 1/2...y int = -3/4

same slope, different y int = parallel lines = no solution = inconsistent

6 0

3 years ago

Read 2 more answers

Solve the equation algebraically x^2=192

lapo4ka [179]

The square root of 192 is 13.856. so the answer is more than likely 14 or 13.85

4 0

3 years ago

Read 2 more answers

Please help I need help with this question

denpristay [2]

Answer:

2.5% and 2.5 · 10^-3, 0.25, 2/5, √5

Step-by-step explanation:

0.25, 2/5, 2.5 · 10^-3, 2.5%, √5

Now let's list them all in the same form, why not decimals.

0.25 = 0.25

2/5 = 4/10 = 40/100 = 0.4

2.5 · 10^-3 = 2.5 · 0.01 = 0.025

2.5% = 0.025

√5 ≅ 2.236

5 0

2 years ago