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iren2701 [21]
2 years ago
5

If there are 5,200 registered voters are randomly sampled, which statements are true of a sample of 30 voters? Check all that ap

ply.The sample size is too small and will show a large variation.The sample size is too small and can lead to false inferences.This is an invalid sample because it randomly chooses voters.A larger sample will give more reliable information.The sample size is too large to make inferences.
Mathematics
2 answers:
wel2 years ago
7 0

Answer:

The First, second, and fourth option

kondaur [170]2 years ago
5 0

Answer:

The sample size is too small and will show a large variation.

The sample size is too small and can lead to false inferences.

A larger sample will give more reliable information.

Step-by-step explanation:

-In statistical sampling, sample size is of critical importance.

-A large sample size increases the accuracy of mean values as it eliminates or flattens out outliers.

-A large sample size also leads to a lower margin of error as the confidence level increases.

-The is greater precision when a larger sample size is used.

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A welder produces 7 welded assemblies during the first day on a new job, and the seventh assembly takes 45 minutes (unit time).
likoan [24]

Answer:

(a). 72.9%.

(b). 13.6 hr.

Step-by-step explanation:

So, we are given the following data or parameters or information which is going to assist us in solving this question/problem;

=> "A welder produces 7 welded assemblies during the first day on a new job, and the seventh assembly takes 45 minutes (unit time). "

=> The worker produces 10 welded assemblies on the second day, and the 10th assembly on the second day takes 30 minutes"

So, we will be making use of the Crawford learning curve model.

T(7) + 10 = T (17) = 30 min.

T(7) = T1(7)^b = 45.

T(17 ) = T1(17)^b = 30.

(T1) = 45/7^b = 30/17^b.

45/30 = 7^b/17^b = (7/17)^b.

1.5 = (0.41177)^b.

ln 1.5 = b ln 0.41177.

0.40547 = -0.8873 b.

b = - 0.45696.

=> 2^ -0.45696 = 0.7285.

= 72.9%.

(b). T1= 45/7^ - 045696 = 109.5 hr.

V(TT)(17) = 109.5 {(17.51^ - 0.45696 – 0.51^ - 0.45696) / (1 - 0.45696)} .

V(TT) (17) = 109.5 {(4.7317 - 0.6863) / 0.54304} .

= 815.7 min .

= 13.595 hr.

8 0
2 years ago
Which rule describes the composition of transformations that maps ΔABC to ΔA"B"C"?
sp2606 [1]

Answer:

  • Option B

Step-by-step explanation:

<u>As per the graph the order of transformations is:</u>

1. 90 degree anticlockwise  rotation about origin

  • This maps ABC to A'B'C'

2. Reflection across x-axis

  • This map A'B'C' to A''B''C''

Correct option is B (transformations read and applied from right to left)

8 0
2 years ago
Read 2 more answers
Which angles form a linear pair? AnglePRL and AngleLRM AngleORP and AngleMRN AngleMRN and AngleNRO AngleLRP and AngleORP
Andrew [12]

Answer: C (AngleMRN and AngleNRO)

Step-by-step explanation:

A linear pair of angles is formed when two lines intersect. Two angles are linear if they are adjacent angles (angles next to each other) formed by two intersecting lines. The measure of a straight angle is 180 degrees, so a linear pair of angles must add up to 180 degrees.

AngleMRN and AngleNRO together is 180 degrees

I'm not very good at explaining but hope this helps ! :)

4 0
2 years ago
The approximate line of best fit is given by the equation y=40x-1800. Based on this trend which of the following best predicts t
serious [3.7K]
Solve for x

(94+1800)÷40 = 47.35

So x = 47.35
8 0
2 years ago
Is the expression x3•x3•x3 equivalent to x3•3•3? Why or why not? Explain your reasoning.
Sunny_sXe [5.5K]
If the first expression reads x(cube) • x(cube) • x(cube) and x(cube • cube <span>• cube), then the answer is no. They are not equal. 
</span>
 x(cube) • x(cube) <span>• x(cube) will be equivalent to x(to the 9th power) while </span>x(cube • cube <span>• cube) will be equivalent to x( to the 27th power). </span><span> 
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3 0
2 years ago
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