The alternating current (AC) breakdown voltage of an insulating liquid indicates its dielectric strength. The article "Testing Practices for the AC Breakdown Voltage Testing of Insulation Liquids" (IEEE Electrical Insulation Magazine, 1995: 21–26) gave the accompanying sample observations on breakdown voltage (kV) of a particular circuit under certain conditions.
62 50 53 57 41 53 55 61 59 64 50 53 64 62 50 68
54 55 57 50 55 50 56 55 46 55 53 54 52 47 47 55
57 48 63 57 57 55 53 59 53 52 50 65 60 50 56 68
a. Construct a boxplot of the data and comment on interesting features.
b. Calculate and interpret a 95% CI for true average breakdown voltage m. Does it appear that m has been precisely estimated? Explain.
c. Suppose the investigator believes that virtually all values of breakdown voltage are between 40 and 70. What sample size would be appropriate for the 95% CI to have a width of 2 kV (so that m is estimated to within 1 kV with 95% confidence)?
Answers
Answer:
(53.50 ; 56.75)
127
Step-by-step explanation:
Given the data:
41, 46, 47, 47, 48, 50, 50, 50, 50, 50, 50, 50, 52, 52, 53, 53, 53, 53, 53, 53, 54, 54, 55, 55, 55, 55, 55, 55, 55, 56, 56, 57, 57, 57, 57, 57, 59, 59, 60, 61, 62, 62, 63, 64, 64, 65, 68, 68
Using calculator :
Standard deviation, s = 5.74
Mean, m = 55.125
Sample size, n = 48
95% confidence interval :
Zcritical at 95% = 1.96
Mean ± Zcritical* s/sqrt(n)
55.125 ± 1.96 * 5.74/sqrt(48)
Lower boundary :
55.125 - 1.96(0.8284976) = 53.50
Upper boundary :
55.125 + 1.96(0.8284976) = 56.75
(53.50 ; 56.75)
Sample size, n :
n = [(Zcritical * s) / Error margin]²
Error margin = 1
Zcritical at 95% = 1.96
s = 5.74
n = [(1.96 * 5.74) / 1]²
n = 11.2504²
n = 126.57
n = 127
Related Questions
what are the special purpose books?
Answers
Answer:
hi Plz Subscribe Sameer Duos Channel
[tex]13.6 =n-1.2[/tex]
Answers
Answer:
7
Step-by-step explanation:
I’m not sure but I took the test
To make purple paint you must mix 3 cups of blue paint with 2 cups of red paint. Sally plans to use 9 cups of blue paint in her batch of purple paint. Which proportion could be used to find out how much red paint Sally will need to make purple paint?
Answers
Answer:
I believe the answer would be 6 cups of red paint.
2) How many distinguishable permutations can be made from
the word sausage?
Answers
Answer:
6 permutations
Step-by-step explanation:
age
sage
sag
gauss
gas
usage
Given f(x) = 4 - x and g(x) = -4x, find (fog)(x).
Answers
set up the composite function and simplify!
Please help I’ll mark Brainly please read the ? Before you answer it don’t say solve
Answers
Answer:
6v+10
Step-by-step explanation:
hope this helped
can also write 6*v+10
Factor
2x3 + 6x2 - 36x
Answers
Answer:
23+62−36
2(3+32−18)
Step-by-step explanation:
The Davis group owns several car dealerships in the metro area. At the end of 2019, it launched a new advertising campaign with the goal of
doubling sales. The Davis group's sales numbers for the first four months of each year are shown in the graph.
Monthly Car Sales
Number of Cars Sold
1,500
1,400
1,300
1,200
1,100
1,000
900
800
2019
700-
2020
600 -
500-
January February March April
Month
Based on the graph, the sales manager published a report in May 2020 claiming that so far in 2020, the group had met its goal of doubling sales.
Is this conclusion correct? Why or why not?
OA
Yes, the conclusion is correct because each of the 2020 sales bars is at least twice as high as the 2019 sales bars, showing that
the sales are at least doubled.
OB.
OC.
Yes, the conclusion is correct because the advertising campaign was designed to double sales.
No, the conclusion is not correct because the graph shows only the first four months of the year.
No, the conclusion is not correct because the y-axis does not begin at zero, so the relative size of the bars does not represent
the ratio of 2020 sales to 2019 sales.
OD.
Answers
No, the conclusion is not correct because the y-axis does not begin at zero, so the relative size of the bars does not represent the ratio of 2020 sales to 2019 sales.
What is a graph?
A graph can be described as a pictorial representation of data. A graph is made up of a y-axis and the x-axis. The y-axis must begin at zero.
Examining the given graph, the y-axis does not begin at zero. Also, the length of the bars in 2020 is not twice then length of the bars in 2019.
To learn more about graphs, please check: https://brainly.com/question/21527145
#SPJ2
Answer:
No, the conclusion is not correct because the y-axis does not begin at zero, so the relative size of the bars does not represent the ratio of 2020 sales to 2019 sales.
Step-by-step explanation:
Plato/Edmentum
is 20 9/10 equal to 18
Answers
Answer:
1820 is equivalent to 910 because 18 x 10 = 20 x 9 = 180.
Step-by-step explanation:
i think
Estimate by rounding each mixed number to thenearest whole number 5 1/3 - 3 7/9
Answers
Answer:
1.6 or 2?
Step-by-step explanation:
5-3 =2
1/3 - 7/9 LCD
3/9 - 7/9 =-4/9
2-4/9 = 1 5/9
16/3-34/9 LCD
1 5/9 = 1.5555555555 rounded is 1.6 or 2? Not sure if decimals count.
What is 0.64 divided by 248?
Answers
Answer:
0.00258064516
Step-by-step explanation:
Answer:
0.64 divided my 248 = 0.00258064516129
the problem is set up incorrectly what you should have put is 248 divided my 0.64 the answer to that is = 387.5
Your welcome!
Step-by-step explanation:
Someone help me please.
Answers
Answer:
I think the answer is 1,370 , not sure .
Can you guys help plsssss I’m tireddddd
Answers
Answer:
#8 - 52°, #9 - 29°
Step-by-step explanation:
8. The two angles added together are a straight line, so they sum up to 180 degrees.
x + (2x + 24°) = 3x + 24° = 180°
3x + 24° = 180°
3x = 156°
x = 52°
9. Similar to #8. "Supplementary" means they add up to 180° (whether they are actually next to each other or not).
So, 4x + (2x + 6°) = 180°
6x + 6° = 180°
6x = 174°
x = 29°
Hope this helps. Get some rest. Zzzzz :)
Joe has 16 pounds of fertilizer for his three gardens. He uses ⅜ of the fertilizer in his first garden and ¼ of the fertilizer in his second garden. What fraction of the fertilizer is left for the third garden? *
Answers
Answer:
3/8
Step-by-step explanation:
3/8 of 16 is 6
1/4 of 16 is 4
6+4 = 10
16-10 = 6
3/8 of 16 = 6
HELP ASAP I WILL GIVE BRAINLYIST
Answers
Answer:
1,728cm squared
Step-by-step explanation:
1. Break the Composite Figure into smaller shapes such as, rectangles, triangles, and squares.
2. Use the area formula for rectangles, triangles, and squares to find the area of each smaller shape.
3. Add the area of the smaller shapes together to get the area of the entire Composite Figure.
Hope this is correct and helps :[]).
What is the value of X
Of this right triangle?
(Photo attached)
Answers
Answer:
a^2+b^2=c^2
6^2+6^2=c^2
36+36=c^2
72=c^2
square root of 72 is 6 radical 2
Step-by-step explanation:
hope this helps i'm 90 percent sure it's right! :)
20% of the middle school students decided not to go skiing. How many middle school students are there if 40 stayed in the lodge?
Write a proportion for the situation.
Solve the problem. Show your work.
Answers
Answer:
Step-by-step explanation:
s(20/100)=40
20s=4000
s=200
So there are a total of 200 students.
Answer:
There are 200 middle school students
Step-by-step explanation:
The equation for this question can be: 40 is 20% of what. This can be simplified to 40 = 0.2x and then to get x by itself you divide 40 by 0.2 which is 200.
solve and explain please
Answers
Answer:
b = √79
Step-by-step explanation:
using pythagorath's theorem
Please help I’ll mark you as brainliest if correct
Answers
Answer:
C
Step-by-step explanation:
V=1/3Ab*h= 100*64= 6400
so C
Someone solve this please?
Answers
Answer:
y = 4
Step-by-step explanation:
The perimeter of a polygon is the distance around the polygon. This can be found by adding up all of the side lengths. In this problem, one is given an expression for the perimeter and an expression for each side length. Using the formula for the perimeter, one can substitute in all of the given expressions and solve for the vairable.
(4y + 5) + (3y + 2) + (4y + 5) + (3y + 2) = 58 + 3y
Simplify,
4y + 5 + 3y + 2 + 4y + 5 + 3y + 2 = 58 + 3y
14y + 14 = 58 + 3y
Inverse operations,
14y + 14 = 58 + 3y
-3y -3y
11y + 14 = 58
-14 -14
11y = 44
/11 /11
y = 4
Compare the areas. What is the ratio of the areas? SHOW YOUR WORK
Answers
Answer:
Ratio of the area of MIKE to TEAM = 9 : 1
Step-by-step explanation:
Ratio of similar shapes = square of the ratio of their corresponding sides
Since TEAM ~ MIKE, therefore the ratio of their areas = square of the height of MIKE : square of the height of TEAM
Ratio = 33² : 11²
Ratio = 1089 : 121
Ratio = 9 : 1
The range of F(x) = 6x3^x is all positive real numbers,
Answers
The product of 8 and p?
Algebra expression
Answers
Answer:
8p
Step-by-step explanation:
8 • p = 8p
in OPQ, the measure of Q=90°, the measure of O=48°, and QO = 4.9 feet. Find
the length of PQ to the nearest tenth of a foot.
please help ne
Answers
∠ O ≈ 42.7°
Step-by-step explanation:
Using the cosine ratio in the right triangle
cos O = = = , thus
∠ O = ( ) ≈ 42.7° ( to the nearest tenth )
Can I have brainliest
can i get help pls ?????
Answers
Answer:
The number of bacteria in the culture after 6 days.
Dont know this question I am 2nd grade math 2 quarters = how many coins
Answers
Answer:
Well, 2 quarters are 2 coins. But, if you are asking the value of 2 quarters, then your answer will be, 50.
Step-by-step explanation:
So, 1 quarter = 25 cents. So that means that, 25 x 2 or 25 + 25 = 50. So, your answer will be 50. Hope that helps! :)
Answer:50
Step-by-step explanation:if a quarter equals 25cents and you have 2 quarters,you have to add .25+25 that equals 50 this is a simple way to do it.
Can some on help me not sure thanks
Answers
Answer:
13 I think
Step-by-step explanation:
So basically all i did was double what the gate had. 5=15 3=13 I dont know if that makes lol
A scientist needs 80 liters of a 30% solution of alcohol. She has a 20% solution and a 60% solution available.
How many liters of the 20% solution and how many liters of the 60% solution should she
30% solution?
mix to make the
Answers
Answer:
hindi ko po maintin dihan sorryyyyyyyyyy
[tex]10 \times + 3y = 5 \\ \times - y = - 6[/tex]
10x+3y=5
x-y+3y=6
Answers
X=6-2y
10(6-2y)+3y=5
Y=55/17
X=-8/17
(X,y)=(-8/17,55/17)
= 5=5
6=6
Answer = (x,y) = (-8/17, 55/17)
A marketing research firm wishes to determine if the adult men in Laramie, Wyoming, would be interested in a new upscale men’s clothing store. From a list of all residential addresses in Laramie, the firm selects a simple random sample of 100 and mails a brief questionnaire to each. What is the population of interest?
Answers
Answer:
The population of interest is composed by all mean that live in Laramie.
Step-by-step explanation:
Sampling
This is a common statistics practice, when we want to study something from a population, we find a sample of this population.
For example:
I want to estimate the proportion of New York state residents who are Buffalo Bills fans. So i ask, lets say, 1000 randomly selected New York state residents whether they are Buffalo Bills fans, and expand this to the entire population of New York State residents.
In this question:
Sample of 100 men from Laramie. This means that the population of interest is composed by all mean that live in Laramie.