Answers
Related Questions
In a random sample of 60 computers, the mean repair cost was $150. Assume the population standard deviation is $36. Construct a 95% confidence interval for the population mean.
Answers
Answer:
The 95% confidence interval for the population mean is between $140.89 and $159.11.
Step-by-step explanation:
We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:
[tex]\alpha = \frac{1-0.95}{2} = 0.025[/tex]
Now, we have to find z in the Ztable as such z has a pvalue of [tex]1-\alpha[/tex].
So it is z with a pvalue of [tex]1-0.025 = 0.975[/tex], so [tex]z = 1.96[/tex]
Now, find the margin of error M as such
[tex]M = z*\frac{\sigma}{\sqrt{n}}[/tex]
In which [tex]\sigma[/tex] is the standard deviation of the population and n is the size of the sample.
[tex]M = 1.96\frac{36}{\sqrt{150}} = 9.11[/tex]
The lower end of the interval is the sample mean subtracted by M. So it is 150 - 9.11 = $140.89
The upper end of the interval is the sample mean added to M. So it is 150 + 9.11 = $159.11
The 95% confidence interval for the population mean is between $140.89 and $159.11.
A bag contains 4 red marbles, 3 blue marbles, and 6 green marbles. What is the probability of choosing a blue marble
Answers
Answer:
3/13 or around 23%
Step-by-step explanation:
Add all the marbles together, than your numerator is the amount of blue marbles.
To solve 5/7 - 2/n = 1/21
Answers
Answer:
-2/n=1/21-5/7
-2/n= -2/3
cross multiple
-2×3=n×-2
-6/-2=-2n/-2
n=3
V is the midpoint of GH. G has coordinates (5, -3), and V has coordinates (-1, 3). Identify the coordinates of H.
Answers
Answer:
(-7,9)
Step-by-step explanation:
Here you go it is here now
Answers
Answer:
40+10=50
40+-15=25
40+-30=10
40+-40=0
40+-50=-10
20+-25=-5
Step-by-step explanation:
in this order
Answer:
40+10=50
40+-15=25
40+-30=10
40+-40=0
40+-50=-10
20+-25=-5
Step-by-step explanation:
the other guy had it right.
The sum of three consecutive EVEN integers is is 138. Find the smallest integer.
Answers
Step-by-step explanation:
Let x be the smallest even integer.
Then (x + 2) and (x + 4) are the other even integers.
We have x + (x + 2) + (x + 4) = 138.
=> 3x + 6 = 138
=> 3x = 132
=> x = 44.
Hence the smallest integer is 44.
get brainliest please help
Answers
Answer:
2
Step-by-step explanation:
9514 1404 393
Answer:
-3/2
Step-by-step explanation:
The line crosses grid intersections at (-1, 2), (1, -1) and (3, -4). These points are separated by 2 units horizontally and 3 units vertically.
The rise (vertical change) is -3 for each run (horizontal change) of +2, so the ratio rise/run is -3/2. That is the slope of the line: -3/2.
HELP ASAPPPP!!! HAUSBJANAHSJISIS
Answers
2: 32
3: 1/2
I think this is it
20 less than 5 times a number is 85. What is the number
Answers
Answer: I don’t understand the question??
Step-by-step explanation: Can you say the question again like the same way the homework does
The total weight of 15 containers on a freight train is 330 tonnes. What is the mean weight of the containers?
Answers
Answer:
the mean weight is 22 tonnes
Step-by-step explanation:
mean=total sum/number of numbers you added
in this case the question already gave you the total so just divide right away
mean weight= 330/15 = 22 tonnes
find the measure of
Answers
(1) Colin wants to cut the pizza into 1/6 slices. Marco wants to cut the pizza into 1/4 slices. What is a common denominator of both fractions so that Marco and Colin can see both fourths and sixths in the pizza? What would the equivalent fractions be?
Answers
1/12
1/6 = 2/12
1/4 = 3/12
Step-by-step explanation:
paper costs $ 40 for 10 teams how much for 1 ream?
Answers
Answer:
$4
Step-by-step explanation:
40/10 = 4
A point has
ono length
no width
no thickness
all of the above
Answers
A point has no length or thickness.
ALL OF THE ABOVE
what is another way to solve 8 × 6.98
Answers
Answer:
8 × 6.98
Step-by-step explanation:
..............
10 points help asap hurry
Answers
Answer:
Betty is right???
Step-by-step explanation:
Need help ASAP will mark Brainly
Answers
Answer:
115°
Step-by-step explanation:
its in the middle of 60° and 70°
f(x)=1/(6x+8)
Only value of x not in the domain?
Answers
Answer:The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.
Interval Notation:
(
−
∞
,
∞
)
Set-Builder Notation:
{
x
|
x
∈
R
}
Step-by-step explanation:
The circumference of a circle is 6π ft. What is the area, in square feet? Express your answer in terms of
π
Please help
Answers
Answer:
Circumference of the circle 2π(radius)=6π ft
Therefore, radius=3 ft
Area=π(radius)²=π×3²=9π ft²
9π ft² is the right answer.
The area of circle is 9π square feet.
What is area?Area is the amount of area occupied by an object's flat (2-D) surface or shape.
The circumference of circle = 2πr
6 = 2πr
r = 3π
And the area of circle is πr².
The area of the circle = 9π
Therefore, the area of the circle is 9π square feet.
To learn more about the area;
https://brainly.com/question/27683633
#SPJ5
13/14% of a quantity is equal to what fraction of the quantity. simplify your answer
Answers
Answer:
=1
Step-by-step explanation:
multiply the numerator and denominator by common integer
i will give brainliest:)
Answers
Answer:
I believe it is A, B, and D.
Step-by-step explanation:
Alan buys a book that is on sale.
He writes the expression 0.7b to show the percent of the original cost of the book, b, that he pays.
He rewrites the expression as b−0.3b.
Which statement explains why Alan rewrites the expression?
He receives another discount on the book.
He buys another book with a different discount.
He wants to show by what percent the book was discounted.
He wants to show what percent of the original price he paid.
Answers
Answer:
D
Step-by-step explanation:
Answer:
d
Step-by-step explanation:
The slope of a line is 2, and the y-intercept is 0. What is the equation of the line written in slope-intercept form?
Answers
Answer:
y=2x+0
Step-by-step explanation:
y=mx+b
y=(slope)x+(y-intercept)
y=2x+0
Answer:
y = 2x
Step-by-step explanation:
y = mx + b
m = slope
b = y intercept
y = 2x + 0
Therefore, the equation is y = 2x.
HELP PLEASE The 30% discount on a $49 dollhouse
Answers
Answer:
$14.70
Step-by-step explanation:
$49 x .30 = $14.70
Please help ASAP 25 pts + brainliest. please show work
Answers
Answer:
it's answer is C. .80
Step-by-step explanation:
With reference angle A
base (b) = 8
Hypotenuse (h) = 10
Now
Cosine A
= b / h
= 8 / 10
= 0.8
It is A as the answer
Step-by-step explanation:
1.multiply 8×10
2.multiply 80 ×6
3.the answer will be over 100 so it has to be A
Emergency plsssssssssssss answer this what is 0.43 rounded to the nearest hundredth
Answers
Answer:
0.430
Step-by-step explanation:
-11x - 7y=-56 what is the slope and y intercept
Answers
Answer:
49/11 I think I'm not sure
Need help fast!!!
Point P has coordinates (1, 3). Point Q has coordinates (4, 8). How long is the line segment? Round to the nearest tenth if necessary.
Answers
Answer:
0
Step-by-step explanation:
0
Find x and y HELP PLS ASAP
Answers
Step-by-step explanation:
A is the correct answer.
What is [tex]12\sqrt1248[/tex]
Answers
Step-by-step explanation:
[tex] \sqrt[12]{1248} = 1.811414676[/tex]