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

The proportion of people in Norway with a blood type of A positive is 36% or 0.36.

The hypothesis can be defined as:

H₀: The proportion of people in Norway with a blood type of A positive is 36%, i.e. p = 0.36.

Hₐ: The proportion of people in Norway with a blood type of A positive is different from 36%, i.e. p ≠ 0.36.

The test statistic is:

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

The information provided is:

p = 0.36

n = 150

Compute the standard deviation used in the test statistic as follows:

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

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

$=\sqrt{0.001536}\\=0.03919184\\\approx 0.04$

Thus, the standard deviation used in the test statistic is 0.04.

5 0

3 years ago

Please help!! Thank you!!

Semmy [17]

Answer: x>-1

Step-by-step explanation:

Dotted line on the axis is covering y infinitely, so theres an inequality on x, and the line is at -1, so x should be > - 1

3 0

3 years ago

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A metal manufacturing company reduces the length of a 12.5-inch cylindrical rod, after which the rod measures 7.8 inches. How ma

gizmo_the_mogwai [7]

Answer:

4.7 inches

Step-by-step explanation:

The original is 12.5, and it was shortened to 7.8. So take the original, subtract the result, and you will get the answer.

12.5-7.8=4.7

7 0

3 years ago

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