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satela [25.4K]
2 years ago
10

A simple random sample of eight high school students' ACT scores gave the following data: What is a point estimate for μ, the me

an test score for the population? a. A point estimate cannot be computed since the data for the whole population are not available. b. 235 c. 29.38 d. 4.84
Mathematics
1 answer:
Grace [21]2 years ago
4 0

Answer: c, is the correct option.

Step-by-step explanation:

The sample mean is the best point estimate for the population mean in a particular study.

Given data of scores: $\begin{array}{llllllll}27 & 30 & 20 & 29 & 28 & 36 & 34 & 31\end{array}$

Sample mean = \frac{\text{Sum of values}}{\text{Number of values}}

=\frac{27+30+20+29+28+36+34+31}{8}\approx29.38

Hence, a point estimate for μ, the mean test score for the population is 29.38

Thus , c. is the correct option.

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AURORKA [14]

Answer:

31

Step-by-step explanation:

|-10 + 41| = 31

The absolute value of a number is ALWAYS positive.

I am joyous to assist you anytime.

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2 years ago
I need help on these question ASAP!!!! This is Urgent
GarryVolchara [31]

Part 1: The equation of the line is y=2x+1

Part 2: The equation of the line in slope intercept form is y=-3x-1

Explanation:

Part 1: It is given that the point A is (1,3) and the line B is y=2 x-2

To determine the line passing through the point A and parallel to line B, let us first determine the slope and y-intercept.

From the equation of line B, the slope is m=2

Substituting the point (1,3) and m=2 in slope intercept form y=mx+b, we have,

3=2(1)+b

3=2+b

1=b

Thus, the y-intercept is b=1

Let us substitute the values m=2 and b=1 in the slope intercept form y=mx+b, we get,

y=2x+1

Thus, the equation of the line passing though point A and parallel to line B is y=2x+1

Part 2: The given two coordinates are (-1,2) and (1,-4)

To determine the equation of line in slope intercept form, first we shall find the slope and y-intercept.

From the graph, we can see that the line touches the y-axis at -1.

Hence, the y-intercept is b=-1

The formula for slope is m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}

Substituting the coordinates (-1,2) and (1,-4), we have,

m=\frac{-4-2}{1+1} =\frac{-6}{2} =-3

Thus, the slope is m=-3

Substituting the values b=-1 and m=-3 in the slope intercept formula y=mx+b, we get,

y=-3x-1

Thus, the equation of the line in slope intercept form is y=-3x-1

4 0
3 years ago
Given the lease terms below, what is the total price of this car if you buy it
Deffense [45]

Answer:

Step-by-step explanation

APEX 28,272

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3 years ago
A portable electronic typewriter cost £180 in 1988. Its price rose by 5% in 1989. What was the new price?
elena-s [515]

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3 years ago
Round your answer to the nearest percent.
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Answer:

Step-by-step explanation:

Givens

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% = ?

Solution

P(~given app) = 71 / 219

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% = 0.324 * 100  = 32.4%

Answer

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