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andrew-mc [135]
4 years ago
8

The sampling distribution has a mean of 0.03 and a standard error of 0.007. The researchers' sample mean comes back at 0.026. In

other words, only 2.6% of the children on the drug experienced food allergies in their youth. What is the z-score for this sample mean?
Mathematics
1 answer:
SIZIF [17.4K]4 years ago
5 0

Answer:

z = -0.57

Step-by-step explanation:

A z-score indicates how much away is something from the mean so it can be more(above) than the mean or less(below) than the mean.

sampling distribution mean = 0.03

standard error = 0.007

researcher's sample mean = 0.026

z = (0.026 - 0.03)/0.007

z = (-0.004)/0.007

z = -0.57

So that means the researcher's sample mean is 0.57 standard deviation below the sampling distribution mean.

The negative sign above is the indicator of below the mean value.

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A

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Use the image to answer questions 6-7.
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x = 22

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Step-by-step explanation:

110 and 5x are equal to each other because they are vertically opposite of each other.

110 = 5x; divide 5 on both side; x = 22

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3 years ago
An obtuse triangle has side lengths of (5.5x + 6.2y) centimeters, (4.3x + 8.3z )and (1.6z + 5.1y) centimeters. Which expression
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Answer:

The expression 9.8x+11.3y+9.9z represents the perimeter, in centimeters of the obtuse triangle.

Step-by-step explanation:

An obtuse triangle is a triangle where one of the internal angles is obtuse (greater than 90 degrees).

The perimeter of a triangle is the total distance around the outside of a triangle, which can be found by adding together the length of each side. Or as a formula:

                                                    P=a+b+c

where:

<em>a, b</em> and <em>c</em> are the lengths of each side of the triangle.

We know that the triangle has side lengths of a = 5.5x + 6.2y, b= 4.3x + 8.3z and c=1.6z + 5.1y centimeters. Therefore, the perimeter is

P=a+b+c\\P=(5.5x + 6.2y)+(4.3x + 8.3z)+(1.6z + 5.1y)\\\\\mathrm{Group\:like\:terms}\\P=5.5x+4.3x+6.2y+5.1y+8.3z+1.6z\\\\\mathrm{Add\:similar\:elements:}\\P=9.8x+11.3y+9.9z

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4 years ago
How much greater is 300 than 3
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300-3=297. Hope this helps!
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It is 74% or 74 by 100 or 0.74
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