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2 years ago

1. What is percent of change formula

1 answer:

5 0

% increase = Increase ÷ Original Number × 100. If the answer is a negative number, that means the percentage change is a decrease.

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Evalute the expression. 2(2+4)^0+3(18+6)^0 A) 0 B) 1 C) 2 D) 5

Anastaziya [24]

Answer:

D, 5

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Use the results from a survey of a simple random sample of 1176 adults. Among the 1176 respondents, 77% rated themselves as abov

Serjik [45]

Using the sample data to test the hypothesis, we have that:

The actual number of respondents who rated themselves as above average drivers is 906.

The p-value of the test is 0, which is less than the standard significance level of 0.05, thus we can conclude that the proportion respondents who rated themselves as above average drivers is greater than 0.7.

77% of the sample of 1176 adults rated themselves as above average drivers, that is:

$0.77(1176) = 906$ .

Thus, the actual number of respondents who rated themselves as above average drivers is 906.

At the null hypothesis, we test if the proportion is $\displaystyle \frac{7}{10} = 0.7$ , that is:

$H_0: p = 0.7$

At the alternative hypothesis, we test if the proportion is greater than 70%, that is:

$H_1: p \geq 0.7$

The test statistic is given by:

$z = \frac{\overline{p} - p}{\sqrt{\frac{p(1-p)}{n}}}$

In which:

$\overline{p}$ is the sample proportion.
p is the proportion tested.
n is the size of the sample.

In this problem, the parameters are $\overline{p} = 0.77, p = 0.7, n = 1176$ .

Thus, the value of the test statistic is:

$z = \frac{\overline{p} - p}{\sqrt{\frac{p(1-p)}{n}}}$

$z = \frac{0.77 - 0.7}{\sqrt{\frac{0.7(0.3)}{1176}}}$

$z = 5.24$

The p-value of the test is the probability of finding a sample proportion above 0.77, which is 1 subtracted by the p-value of z = 5.24.

Looking at the z-table, z = 5.24 has a p-value of 1.

1 - 1 = 0.

The p-value of the test is 0, which is less than the standard significance level of 0.05, thus we can conclude that the proportion respondents who rated themselves as above average drivers is greater than 0.7.

A similar problem is given at brainly.com/question/24330815

7 0

2 years ago

What is the nth term of 1, 3, 9

Delvig [45]

Answer:

3ⁿ

Step-by-step explanation:

The nth term is:

3ⁿ

6 0

1 year ago

Assessment: Solve Me!

Arte-miy333 [17]

Answer:

1 . option b

2. option d

Step-by-step explanation:

1) Diameter = 8cm

Radius = 8/2 = 4cm

2) Diameter = 8cm

Radius = 4cm

$Volume = \frac{1}{3} \pi r^2h = \frac{1}{3} \pi 4^2 \times 15 = 16 \pi \times 5 = 80 \pi = 251.2cm^3$

5 0

3 years ago

Can someone help me with 19, 20, 23, and 24.

Aleksandr [31]

Allright to find this you have to put the equation into order again. The equation of a line is y=mx+c. M= Gradient. C = Y intercept. After you put it in order you just have to read it. If you need the answers comment ill find them...

7 0

3 years ago