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Andru [333]
3 years ago
5

What is the critical value z* for constructing a 95% confidence interval?

Mathematics
1 answer:
MariettaO [177]3 years ago
8 0

Answer: The Z value for 95% confidence is Z=1.96.

Step-by-step explanation:

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Write a numerical expression to match the word expression. ) Two less than one-third of the product of nine fourths and twelve 1
avanturin [10]

Answer:\frac{1}{3} ((\frac{9}{4})(12))-2

Step-by-step explanation:

8 0
3 years ago
Preston measured the button on his shirt. Then he calculated that it has an area of 50.24 square millimeters. What is the button
soldi70 [24.7K]
*note: for this problem you have to round a few values. I rounded to 2 decimal places, but your answer could be different if you have to round to more/less than 2 decimal places

Answer: Diameter = 8 millimeters


Buttons are circles, so we will use the formula for area of a circle:

A = πr^2

We are solving for the diameter, which is 2 times the radius:

d = 2r

So now we plug in what we know.
The area A = 50.24 square millimeters, therefore we plug it in and simplify:

50.24 square millimeters = πr^2

50.24/π = r^2

15.99 = r^2

squareroot(15.99) = r

r = 4 millimeters

Now we use the radius to calculate the diameter.

r = 4 millimeters

d = 2r

d = 2(4)

diameter = 8 millimeters
8 0
3 years ago
3х + Зу = 63<br> What is the slope of a line perpendicular to the line?
Neko [114]

m=1 is the answer for that question

8 0
4 years ago
3. During liftoff, a space shuttle accelerated to a speed of 862 m/s in 75 seconds. What was the
spin [16.1K]

11.493 or 11.5

Step-by-step explanation:

by dividing speed by time. 862/75

8 0
3 years ago
Tosha is making muffins for breakfast. The recipe calls for 2 1/8 cups of white flour and 1 3/4 cups of wheat flour. What is the
Alexeev081 [22]
2 1/8 + 1 3/4

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There is a total of 3 7/8 cups of flour.
7 0
3 years ago
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