Answer:
The 90% confidence interval estimate of the mean of the population is between 6627 and 6941.
Step-by-step explanation:
We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 15 - 1 = 14
90% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 14 degrees of freedom(y-axis) and a confidence level of [tex]1 - \frac{1 - 0.9}{2} = 0.95[/tex]. So we have T = 1.761
The margin of error is:
[tex]M = T\frac{s}{\sqrt{n}} = 1.761\frac{345}{\sqrt{15}} = 157[/tex]
In which s is the standard deviation of the sample and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 6784 - 157 = 6627
The upper end of the interval is the sample mean added to M. So it is 6784 + 157 = 6941
The 90% confidence interval estimate of the mean of the population is between 6627 and 6941.
Which list shows the runners in order by their completion times from fastest to slowest
Answer:
answer is D
Step-by-step explanation:
12+1/2=12.5 12+2/5=12.4
(-14.2b - 97.35) + (6.76d - 118.7 - 3.4d )
Answer:
Hi! The answer to your question is -14.2b+3.36d-216.05
Step-by-step explanation:
Simplify the Expression.
How do you round 60.95 to the nearest whole number ? What will it become
Answer:
it would become 61
Step-by-step explanation:
the tenths place (.9) is greater or equal to five. if it follows the rule, the tens place (0) would increase by one.
Aldo runs 4 miles in 30 minutes. At the same rate, how many miles would he run in 48 minutes?
HELP ANSWER FAST PLEASE
Answer:
miles/time = miles/time
miles/48 min = 4 mi/30 minmiles = 48(2/15)
miles = 96/15
miles = 6.4 miles
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Step-by-step explanation:
GEOMETRY!!! Will give brainliest
Please help I need it
Answer:
A. Yeah
Step-by-step explanation:
geometry
please help!!
picture included
Answer:
x = 12
Step-by-step explanation:
Acvording to the intersecting chord theorem, the products of the line segments formed are equal to each other.
Therefore:
5*x = 10*6
5x = 60
Divide both sides by 5
5x/5 = 60/5
x = 12
What is the volume?
Answer: 108 cm^3
Step-by-step explanation:
2 x 5 x 8 = 80
7 x 2 x 2 = 28
80 + 28 = 108
300 is 60% of what of number
Answer:
500
Step-by-step explanation:
your welcome!!!!!!!
Answer:
500 is the number
Step-by-step explanation:
The slope of a line is – 3, and a point on the line is (4, -1).
What is the equation of the line expressed in slope-intercept form?
Answer:x=6
Step-by-step explanation:
Select all statements that are true about bases and heights in a parallelogram
Answer:
hi
Step-by-step explanation:
1. The area formulas for a triangle and a parallelogram require multiplying base by height.
true
2 .A triangle and parallelogram with the same base and height will have the same area.
false
3. A rectangle and parallelogram with the same base and height will have the same area.
true
4. The area formula of a trapezoid requires finding the product of the bases.
false
5. The base of a triangle is always the shortest side.
false
Answer:
12
Step-by-step explanation:
determine the solution using substitution y=3/2x-6 2y=7-4x
Answer:
x = 19/7 , y= -27/14
Step-by-step explanation:
Question 6 of 23
What is the slope-intercept equation of the line below?
Pls answer and show work!!
Marcos can eat 9 redhots in 15
seconds. At this rate, how
many red hots can he eat in 90
seconds?
Answer:
54
Step-by-step explanation:
90 divided by 15 is 6
9 times 6 is 54
Mark me as brainliest if this helps!
Subtract the polynomials:
(1 Point)
f(x) = 10x4 + 2x² +1; 8 (x) = 3x4 + 3x + 11
O f (x) – 8(x) = 7x4 + 2x2 – 3x – 10
O f(x) – 8 (x) = 7x4 + 2x2 – 3x + 12
O f (x) – 8(x) = 7x4 + 2x2 + 3x + 12
O f(x) – 8(x) = 7x4 + 2x2 + 3x - 10
Answer: thats the answer
Step-by-step explanation:
How can the product of 5 and 0.3 be determined using this number line? Number line from 0 to 2.0 with tick marks at every tenth. An arrow goes from 0 to 0.3. Enter your answers in the boxes. Make_____ jumps that are each_____unit long. You end at______ , which is the product of 5 and 0.3.
Answer:
5 0.3 1.5
Step-by-step explanation:
you count by 3
To determine the product of 5 and 0.3 using the number line described, make 5 jumps that are each 0.3 units long, you end up at 1.5.
Since the distance between each consecutive tick marks is 0.3 ; we only need to jump 5 times starting from the 0 towards the right. Hence, jumping five times towards the right by a distance of 0.3 each time gives a value of 1.5 on the final or end point which is also the product of 0.3 × 5Learn more :https://brainly.com/question/18112348
Solve for x, round to the nearest thousandth.
Answer:
33
Step-by-step explanation:
hope this helps
Athena sells plates at a deal of 5 for $10. If Athena sells 25 plates per every half hour, how much money will Athena make?
Answer:10*25=250
Step-by-step explanation:
select THREE expressions that are equivalent to 6 x + 1 − ( 3 x − 1 )
Answer:
3x+2 is your answer
Step-by-step explanation:
6 x + 1 − ( 3 x − 1 )
6x+1-3x+1
3x+2
Answer:
3x + 2
Step-by-step explanation:
Distribute
6 + 1 − 3 + 1
Add the numbers
6 + 2 − 3
Combine like terms
3x + 2
in Enter a number into each box to create
an equation that has exactly no real solution.
3(2x+5)-X =
2) Enter a number into
each box to create an
equation that has exactly one real solution.
19x -(5x+9)+7=
Answer: 5X+15
The first one is
The second one is 2(7X+8)
On this necklace the ratio of black beads to white beads is 1:4
How many more black beads do you need to
add to make the ratio of black to white 4:1 ?
Answer:
16
Step-by-step explanation:
This is because the ratio of black to white can be set up as 1/4, for every one black bead there is 4 white so what is 1/4x that equals 4? simple, x=16 because 16/4 equals to 4 so it would be 4 black beads to 1 white bead.
13 points.First Come First Serve!!!!
(=0w0=) Little one, welcome! Aaliyah!
Triangle ABC is similar to triangle FGH.
H
А
6 cm
B
12.5 cm
+
9 cm
5 c
15 cm
с
F
What is the value of x in centimeters?
Answer:
i can't understand the question but if you put a link I can figure it out
If 2(6 + 3x) + 1 = - 5 + 3(x - 1), what is the value of x?
Answer: x = -7
Step-by-step explanation:
2(6 + 3x) + 1 = - 5 + 3(x - 1)
(2) (6) + (2) (3x) + 1 = -5 + (3) (x) + (3) (-1)
12 + 6x + 1 = - 5 + 3x + - 1
( 6x ) + ( 12 - 1 ) = ( 3x ) + ( -5 + -3 )
6x + 13 = 3x - 8
6x + 13 - 3x = 3x - 8 - 3x
3x + 13 = -8
3x + 13 - 13 = -8 - 13
3x = -21
3x/3 -21/3
X = -7
Which of the following statements are equivalent?
x - y = 2 and x = y + 2
The expression (y11)(y2)8 is equivalent to yx. What is the value of x?
HELP PLS!!!
120=x-523?
Answer:
-62760
Step-by-step explanation:
Can someone teach me how to do this pleasseeee!
Answer:
y's go
13, 6, 5, 4, -3
Step-by-step explanation:
well so you have the equation y = 5 - x^3
you are given the x for all of them
y = 5 - (-2)^3
5 - (-8) = 13
y = 5 - 0^3
5 - 0 = 5
y = 5 - 1^3
5 - 1 = 4
y = 5 - 2^3
5 - 8 = -3
Between which two consecutive integers is each number located on a number line?
7.81
Answer:
7;8
Step-by-step explanation:
7 < 7.81 < 8
Yesterday there were 40 problems assigned for math homework. Corey did 10% of the problems
incorrectly. How many did he get wrong?
Answer:
Step-by-step explanation:
The answer is 4 questions.
The 10% of 40 is 10×(40/100)
= 400/100
=4