# In the 1992 presidential campaign, H. Ross Perot received about 20% of the popular vote. As the 1996 campaign approached, a statistician wanted to test whether Perot had maintained the same level of support. He polled 100 people and found that 15 of them supported Perot. He will use a .01 level of significance. What is the value of the test statistic? a. –1.40 b. –1.25 c. 1.25 d. 1.40

The correct option is b.

Step-by-step explanation:

Given information:

Population proportion = 20% = 0.2

Sample proportion =

Sample size = 100

Let as assume that the sample is normally distributed.

The formula for test statistics is

where,

p is sample proportion.

P is population proportion.

Q is 1-P

n is sample size.

The value of the test statistic is

The value of test statistic is -1.25. Therefore the correct option is b.

## Related Questions

Prove that: 5^31–5^29 is divisible by 100.

See explanation

Step-by-step explanation:

Consider the expression

First, factor it:

Note that

Then

This shows that number 100 is a factor of the expression and, therefore, this expression is divisible by 100.

5^27*6*100

Step-by-step explanation:

Definetly correct as its correct on RSM

What is the product of the square root of 64 and the square root of 25?

The product of the square root of 64 and the square root of 25 is worked out as follows:
The square root of a number is a number that produces a product when is multiplied by itself. For example eight multiplied by eight equals 64 (8 x 8 = 64) and 5 x 5 = 25.
The square root of 64 = 8 and the square root of 25 is 5.

A product is the result of two or more numbers that are multiplied together.
Therefore, the product of the square root and the square root of 25 is 8 x 5 = 40.
64 = 8
25 = 5

May I please have help with this math problem? which of the following statements are true if Parabola 1 has the equation f(x)=x2+4x+3 and Parabola 2 has a leading coefficient of 1 and zeros at x = -5 and x = 1. (multiple things may apply)
1. Parabola 1 and Parabola 2 have a zero in common.
2. Parabola 1 and Parabola 2 have the same line of symmetry.
3. Parabola 1 crosses the y-axis higher than Parabola 2.
4. Parabola 1 has a lower minimum than Parabola 2.

Parabola 1:
f (x) = x2 + 4x + 3
f (x) = (x + 1) (x + 3)
intersection with y:
f (0) = (0) ^ 2 + 4 (0) +3
f (0) = 3
Axis of symmetry:
f '(x) = 2x + 4
2x + 4 = 0
x = -4 / 2
x = -2
Minimum of the function:
f (-2) = (- 2) ^ 2 + 4 * (- 2) +3
f (-2) = - 1

Parabola 2:
g (x) = (x + 5) (x-1)
g (x) = x ^ 2 - x + 5x - 5
g (x) = x ^ 2 + 4x - 5 intersection with y:
g (0) = (0) ^ 2 + 4 (0) - 5
g (0) = - 5
Axis of symmetry:
g '(x) = 2x + 4
2x + 4 = 0
x = -4 / 2
x = -2
Minimum of the function:
g (-2) = (- 2) ^ 2 + 4 * (- 2) - 5
g (-2) = - 9