Evaluate the expression when m= -2.8 and n=-6.3. 4n

Sphinxa [80]

90 can go into 3 only 1/30 of one time.

6 0

3 years ago

In the United States, 36 percent of the people have a blood type that is A positive. From a random sample of 150 people from Nor

Flauer [41]

Answer:

The standard deviation used to calculate the test statistic for the one-sample z-test is 0.04.

Step-by-step explanation:

A single proportion z-test can be performed to determine whether the proportion of people in Norway with a blood type of A positive is different from that in the United States.

It is provided that the percentage of people in the US with blood type A positive is, p = 36%.

A random sample of n = 150 people from Norway are selected to check the above claim.

The hypothesis can be defined as:

H₀: The proportion of people in Norway with a blood type of A positive is same as that in the United States, i.e. p = 0.36.

Hₐ: The proportion of people in Norway with a blood type of A positive is different from that in the United States, i.e. p ≠ 0.36.

The test statistic for the the hypothesis testing is:

$z=\frac{\hat p-\mu_{\hat p}}{\sigma_{\hat p}}$

The mean of the sample proportion is:

$\mu_{\hat p}=p$

The standard deviation of sample proportion is:

$\sigma_{\hat p}=\sqrt{\frac{p(1-p)}{n}}$

Compute the standard deviation value as follows:

$\sigma_{\hat p}=\sqrt{\frac{p(1-p)}{n}}$

$=\sqrt{\frac{0.36(1-0.36)}{150}}$

$=0.03919184\\\approx0.04$

Thus, the standard deviation used to calculate the test statistic for the one-sample z-test is 0.04.

5 0

3 years ago

Mr. Johnson lost 15 pounds over the summer by jogging each week. By

sattari [20]

He gained 5 pounds i belive

4 0

4 years ago

Math practice 3 Seriously please help Will give brainest

OLEGan [10]

Answer:

the last one

Step-by-step explanation:

the line under the < shows that the circle is closed and the fact that the arrow is going left means on the line it goes left so its <--------● this one

7 0

3 years ago

Read 2 more answers

The ramp in the picture makes an angle of 73° with the doorpost. What is the measure of the angle ∠QPR, between the ramp and the

siniylev [52]

Answer:

A. ∠ QPR = 17°

Step-by-step explanation:

From the given information, let QP be the length of the ramp.

Then, ∠ QPR is the angle between the ramp and the ground.

∠ PQR is the angle between the ramp and the doorpost and

∠ QRP is the angle between the doorpost and the ground.

Clearly, ∠ PQR = 73° (given)

∠ QRP = 90° (since doorpost and the ground are perpendicular to each other)

Now, use triangle sum propoerty of ΔQPR, we get,

∠ QPR + ∠ PQR + ∠ QRP = 180°

∠ QPR + 73 + 90 = 180°

∠ QPR + 163 = 180°

∠ QPR = 180 - 163

∠ QPR = 17°

6 0

3 years ago

Evaluate the expression when m= -2.8 and n=-6.3. 4n - 6m