Answer:
CI = (-0.0445, 0.0225)
there is no sufficient evidence to men and women have equal success in challenging calls
Step-by-step explanation:
Sample size for men; n1 = 1425
Number of success for men; x1 = 412
Sample size for women; n2 = 739
Number of success for women; x2 = 221
Significance level; α = 0.05
Sample proportion for men;
p1 = x1/n1 = 412/1425
p1 = 0.2891
Sample proportion for women;
p2 = x2/n2 = 221/739
p2 = 0.2991
From tables, z-score at significance level of 0.05 is 1.96.
Formula for margin of error is;
E = z√[(p1(1 - p1)/n1) + (p2(1 - p2)/n2)]
Plugging in the relevant values;
E = 1.96√[(0.2891(1 - 0.2891)/1425) + (0.2991(1 - 0.2991)/1425)]
E = 1.96 × 0.0170687
E = 0.0335
Coordinates of the confidence interval will be;
[(p1 - p2) - E], [(p1 - p2) + E]
[(0.2881 - 0.2991) - 0.0335], [(0.2881 - 0.2991) + 0.0335]
CI = (-0.0445, 0.0225)
This means that the confidence interval contains 0 since it's between (-0.0445 and 0.0225). Thus we can conclude that there is no sufficient evidence to men and women have equal success in challenging calls
An online shopping club has 14,000 members when it charges $9 per month for membership. For each $1 monthly increase in the membership fee, the club loses approximately 500 of its existing members. Write and simplify a function R to represent the monthly revenue received by the club when x represents the price increase.
Hint: Monthly revenue = # membersmonthly fee.
PLEASE HELP
Answer:
The max revenue is acheived with 7 increases
Step-by-step explanation:
Revenue = Members * (Cost Per Member)
R = (4600 - 200x) ( 9 + 1x)
Where x represents the number of $1 increases
9th grade math need help please
Answer:
Option 4 is the answer because both of the equations are same
What angles are vertical? Will mark brainliest
Answer:
7&6 and 8&5 I believe their on the opposite sides
HELP PLZ ASAP T^T
1. 90% of 250 is
2. 65% of 400 is
3. 85% of 800 is
Answer
1= 225
2= 260
3= 704
A jewelry store is having a going out of busniess sale. All merchandise is marked 40% off the reguler price. The regualr price of a watch is $59.95. Find the amount of the discount and the sale price.
Answer:
Amount of the Discount: $23.98
Sale Price: $35.97
Step-by-step explanation:
In order to calculate the discount we first need to turn this percentage into a decimal by dividing it by 100. Once we have it in decimal form we subtract that value from 1. Finally, we multiply this new decimal by the original price in order to obtain the sale price like so...
40 / 100 = 0.40
1 - 0.40 = 0.60
0.60 * 59.95 = 35.97
Now we have the sale price which is $35.97 now we can subtract this value from the original price to calculate the amount of the discount.
59.95 - 35.97 = 23.98
sec 16° cosec 74° - cot 74º tan 16º.
Answer:
Check this..............
how do i find the angle of a triangle with no sides or angles given
Answer:
from angle sum property use 180 degree
Step-by-step explanation:
180 is equal to 3x
180/3
60
I NEED HELP THANK YOUUUY
Answer:
(4,4)
Step-by-step explanation: trust me bro
(-6+51)+(2-5i)-(1+61)
Answer:
-15 - 5 i
Step-by-step explanation:
Answer:
−15 − 5i
Step-by-step explanation:
The image below shows step-by-step on how to solve it.
Hope this helps! :)
Which one is correct?
Answer:
3
Step-by-step explanation:
What is 1/4 divided by 9/10 rewritten with an important fraction?
Step-by-step explanation:
[tex]{:}\hookrightarrow\sf \dfrac {1}{4}\div \dfrac {9}{10}[/tex]
[tex]{:}\hookrightarrow\sf \dfrac {1}{4}\times \dfrac {10}{9}[/tex]
[tex]{:}\hookrightarrow\sf \dfrac {10}{36}[/tex]
[tex]{:}\hookrightarrow\sf \dfrac {5}{18}[/tex]
Shawn would like to know the average height of the trees in the back field at school. She measures the heights of each tree in a random sample of 20 trees. The mean height of Shawn's sample is 61 inches, and the MAD (mean absolute deviation) is 2 inches.
Select all that apply
Question options :
The median height of the sample must be between 59 and 63 inches.
Another random sample of 20 trees is likely to have a mean between 57 and 65 inches.
The mean height of these 20 trees is likely to be the same as the mean height of all trees in the back field .
The mean height of these 20 trees is likely to be the same as the mean height of a second random sample of 20 trees.
Shawn would be more likely to get an accurate estimate of the mean height of the population by sampling 40 trees instead of sampling 20 trees.
Answer:
The median height of the sample must be between 59 and 63 inches.
The mean height of these 20 trees is likely to be the same as the mean height of all trees in the back field .
The mean height of these 20 trees is likely to be the same as the mean height of a second random sample of 20 trees.
Shawn would be more likely to get an accurate estimate of the mean height of the population by sampling 40 trees instead of sampling 20 trees
Explanation:
The mean absolute deviation is the summary of absolute deviations from the central point or average of a data set. The central point measurement can be the mean, median or mode of the data set. An average absolute deviation can be used instead of a standard deviation to measure dispersion from central point.
In the above case, a sample is taken of 20 trees and there is a mean absolute deviation of 2, hence, median can be between 59 and 63. Also sample represents population, therefore mean of another sample taken is likely to be same as the previous one taken. Mean invariably gets more accurate as sample size increases too.
what is the slope for the graph in the question?
1/3
3
2
1/2
Answer:
3
Step-by-step explanation:
its the answer becuase thats what the answer is
Dan is completing a 60-kilometer run. The diagram below shows what percent he has run so far.
60 % from 60 km
How many kilometers has he run so far?
Answer:20
Step-by-step explanation:
i got it right in my dca
a box contains different colored marbles if p(blue) = 1/4 p(green)= 1/4 and blue and green =1/12
Answer:
The events are independent because P(blue) P(green) P(blue and green).
D
Step-by-step explanation:
what is the whole number of 9
Answer:
9/1
Step-by-step explanation:
Answer:
Um wym?
Step-by-step explanation:
One quart of cranberry juice equals 4 cups. How many quarts of cranberry juice is needed for the recipe? If you can only buy whole quarts of juice, will there be cranberry juice left over?
Answer:
you have to provide the recipie
Step-by-step explanation:
Find the measure of an interior angle of a regular dodecagon(12-sided polygon). Hint: Sum = (n-2)180
Step-by-step explanation:
Sum of interior angles in a polygon = 180°(n - 2).
Size of interior angle in a regular polygon
= 180° - 360°/n
= 180° - 360°/12
= 180° - 30°
= 150°.
help me real quickhahahahaha
Answer:
19
Step-by-step explanation:
2d= 2 x 8= 16
16+3= 19
Answer:
Step-by-step explanation:
2d + 3 (d=8)
(2*8) + 3 =
16 + 3 =
19
What is the Slope of the line?
Answer:
1/2
Step-by-step explanation:
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Prove that sin²a + cos²a = 1 and = [tex]\frac{1}{cos^{2}a }[/tex] + tan²a (a not alpha)
Answer:
[tex]\frac{1}{cos^2a }= tan^2 a[/tex]
Step-by-step explanation:
Explanation:-
Given sin²a + cos²a = 1
and
[tex]\frac{1}{cos^{2} a} \\= \frac{sin^2a+cos^2a}{cos^2a} \\ \\\\ = \frac{sin^2a}{cos^2a} +\frac{cos^2a}{cos^2a}[/tex]
= tan²a + 1
Marry went to kohl’s and brought shoes for 32.99 what was her total cost if tax was 6.5 percent
Answer:
5.08
Step-by-step explanation:
Justify whether matrix a is invertible.
Answer: C. No, because its determinant is zero.
Step-by-step explanation: I got this right on Edmentum.
No, because its determinant is zero. The correct option is C.
What is a matrix?
A matrix, which is used to represent a mathematical object or an attribute of one, is a rectangular array or table containing numbers, symbols, or expressions that are organized in rows and columns.
The given matrix is,
[tex]\left[\begin{array}{cc}6&-4\\-9&6\\\end{array}\right][/tex]
The determinant of the matrix will be calculated as below:-
D = ( 6 x 6 ) - ( -9 x -4 )
D = ( 36 - 36 )
D = 0
Here the determinant of the matrix is zero. Therefore, the matrix is not invertible.
To know more about matrix follow
https://brainly.com/question/11989522
#SPJ5
3 1/3 divided by 1 1/4 =
ANSWER ASAPPPPPP. BE RIGHT AND EXPLAIN
Answer:
2 17/20
Step-by-step explanation:
make 3 1/3 an improper fraction = 9/3
make 1 1/4 an improper fraction = 5/4
flip the second fraction = 4/5
cross multiply
4 x 3 = 12
9 x 5 = 45
add
45 + 12 = 57 (our numerator)
5 x 4 = 20 (our least common denominator)
simplify
2 17/20
hope this helps <3
7.
NOT TO
SCALE
8.
Р
С
B
In the diagram. PQ is parallel to BC.
APB and AQC are straight lines.
PQ = 8 cm, BC = 10 cm and AB = 9 cm.
Calculate PB
Answer:
PB = 1.8
Step-by-step explanation:
PQ = 8 cm, BC = 10 cm and AB = 9 cm
∆ABC is similar to ∆APQ.
Therefore:
[tex] \frac{AB}{AP} = \frac{BC}{PQ} [/tex]
Plug in the values
[tex] \frac{9}{AP} = \frac{10}{8} [/tex]
Cross multiply
AP × 10 = 8 × 9
AP × 10 = 72
Divide both sides by 10
AP = 7.2
PB = AB - AP
PB = 9 - 7.2
PB = 1.8
What question can you never answer yes to? I will give brainliest I also have other riddles that havent been answered yet.
Answer:
Are you sleeping?
The equation modeling the population growth of a small town is P(t)=30000(1.02)^t, where P represents the population, and t represents the years from now. What is the approximate population change that occurs between 2 years from now and 10 years from now.
a.5,358
b.6,570
c.31,212
d.35,150
e.36,570
Answer: I’m not for sure but I got 31,212
Step-by-step explanation: You multiply 30000 to 1.02 and then with the 2 and the 10 you divided and get 31,212
The population change between these years is (a) 5358
The population model is given as:
[tex]\mathbf{P(t) = 30000(1.02)^t}[/tex]
When t = 2, we have:
[tex]\mathbf{P(2) = 30000(1.02)^2}[/tex]
[tex]\mathbf{P(2) = 31212}[/tex]
When t = 10, we have:
[tex]\mathbf{P(10) = 30000(1.02)^{10}}[/tex]
[tex]\mathbf{P(10) = 36570}[/tex]
The population change is then calculated as:
[tex]\mathbf{\Delta P = P(10) - P(2)}[/tex]
So, we have:
[tex]\mathbf{\Delta P = 36570 - 31212}[/tex]
[tex]\mathbf{\Delta P = 5358}[/tex]
Hence, the population change between these years is (a) 5358
Read more about population change at:
https://brainly.com/question/20401046
-3/7 * 3/8
*= times PLEASE HELP ITS MISSING WORK PLEASE
Answer:
ok so -3x3 is -9 and 8x7 is 56 so i think its -9/56
Step-by-step explanation:
Answer:
-0.16071428571
Step-by-step explanation:
:) (its true)
A snail travels 1/8 mile in 3/4 hour. The snail's speed is miles per hour.
9514 1404 393
Answer:
1/6 mph
Step-by-step explanation:
To find miles per hour, divide miles by hours.
(1/8 mi)/(3/4 h) = (1/8×4/3) mi/h = 1/6 mi/h
The snail's speed is 1/6 miles per hour.
Answer:
The answer is 1/6
AB and BC form a right angle at point B. If A= (-3,-1) and B = (4,4), what is the equation of BC?
A. x+3y= 16
B. 2x+y= 12
C. -7x - 5y=-48
D. 7x-5y= 48
Answer: We have then:
y-yo = m (x-x0)
m = (y2-y1) / (x2-x1)
m = (4 - (- 1)) / (4 - (- 3))
m = 5/7
We choose an ordered pair:
(xo, yo) = (4, 4)
Substituting:
y-4 = (5/7) (x-4)
y = (5/7) x-20/7 + 4
7y = 5x - 20 + 28
7y = 5x + 8
y = (5/7) x + 8/7
The equation of the perpendicular line is:
-7x - 5y = -48
Answer:
the equation of BC is:
(C) -7x - 5y = -48
Step-by-step explanation:
