For the 1,000-meter running event, Abby's mean time is 4.5 minutes with a standard deviation of 0.75 minutes. For the 800-meter event, Abby's mean time is 3.2 minutes with a standard deviation of 0.4 minutes. In the last track meet, Abby ran the 1,000-meter race in 4.1 minutes and the 800-meter race in 3 minutes. In which event did Abby have a better performance?
Answer:
He performed better in the 800 m race
Step-by-step explanation:
Obtain the standardized score for each event :
Zscore = (score - mean) / standard deviation
1000 meter :
Mean = 4.5 ; Standard deviation = 0.75 ; x = 4.1
Zscore = (4.1 - 4.5) / 0.75
Zscore = - 0.4 / 0.75 = - 0.5333
800 meter :
Mean = 3.2 ; Standard deviation = 0.4 ; x = 3
Zscore = (3 - 3.2) / 0.4
Zscore = - 0.2 / 0.4 = - 0.5
-0.5 > - 0.533
Hence, he performed better in the 800 m race
Answer:
Abby had a better performance in the 800-meter because this z-score was closer to the mean than the z-score for the 1,000-meter.
Step-by-step explanation:
did it on egde
A study has shown that the daily amount of milk produced by a dairy cow is
normally distributed, with a mean of 6.2 gallons and a standard deviation of
0.7 gallons. On a given day, 95% of the cows will produce an amount of milk
within which of the following ranges?
A. 5.5 gallons to 6.9 gallons
B. 4.8 gallons to 7.6 gallons
O
C. 4.1 gallons to 8.3 gallons
O D. 3.4 gallons to 9.0 gallons
SUBMIT
The range of milk production that 95% of the cows will fall within is option B: 4.8 gallons to 7.6 gallons.
To find the range of daily milk production that 95% of the cows will fall within, we can use the empirical rule, which states that for a normal distribution:
About 68% of the observations fall within one standard deviation of the mean.
About 95% of the observations fall within two standard deviations of the mean.
About 99.7% of the observations fall within three standard deviations of the mean.
Since we are looking for the range of milk production that 95% of the cows will fall within, we need to find the range that is within two standard deviations of the mean. That range is:
Mean ± 2SD
= 6.2 ± 20.7
= 6.2 ± 1.4
= [4.8, 7.6]
To learn more about the standard deviation;
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Please help, and i will make you BRAINLIEST
Four more than the quotient of 300 and a number
A. 4 + (300 - n)
B. (300/n) + 4
C. 4 + 300n
D. (300n +4) + n
Answer:
I believe the answer is b as my friend dream said
Step-by-step explanation:
2. How can Diego package all the 64 cookies so that each bag has the same number of them? How many bags can he make, and how many cookies will be in each bag? Find all the possible ways to package the cookies.
:
Hiiioo can someone please help me please!
Answer:
B, -3/4
Step-by-step explanation:
Slope can be found by using rise over run. From point x the line drops three points making the rise -3, and it goes to the right four points making the run 4. That makes our answer -3/4.
-(x-3)=-7 I need help with this equation
Answer:
x = 10
Step-by-step explanation:
Given
- (x - 3) = - 7 ( divide both sides by - 1 )
x - 3 = 7 ( add 3 to both sides )
x = 10
Write in Slope Intercept form
Answer:
its the first choice
Step-by-step explanation:
Answer:
y= -3/5x +5
Step-by-step explanation:
Step one - find where the line is intercepting. In your case this is at positive 1.
Next step is to check the change of the slope - directio. The line goes up to the positive Y access and to the left of the negative X access.
That leads to a negative slope.
Respectavley the only posible answer on this question is
y= -3/5x +5
Good luck.
FB: sharp4math
Combine the like terms to create an equivalent expression:
-4p+(-6p)
Answer:
-10p
Step-by-step explanation:
-4 - 6 = -10
-10
Step-by-step explanation:
combine like terms to create an equivalent
it took katie4 hours to knit 9 scarves how many scarves could you make in 24 hours
Answer:
54 scarves
Step-by-step explanation:
4 hours-9 scarves
8 hours-18 scarves
12hours -27 scarves
16 hours-36 scarves
20 hours-45 scarves
24 hours-54 scarves
pattern: h+4 (hours) s+9 (scarves)
This question is 15 points and please help me! Each answer is different. Please put it in order and don't scam this is my last points thanks so much!
Answer:
What are all the opions
Step-by-step explanation:
Also I think its
1. communtive, asscotive
2. Disvision Property
3. to the left side ( I think)
Hope this helps and sorry about your points ;-;
please help me i will mark brilient
[tex] \red{20 \: \frac{1}{4} \div 9}[/tex]
[tex] = \frac{81}{4} \div 9[/tex]
[tex] = \frac{^{9}\cancel{81}}{4} \times \frac{1}{\cancel{9}^{1} } [/tex]
[tex] = \frac{9}{4} [/tex]
[tex] \blue{ = \boxed{2 \: \frac{1}{4} }}[/tex]
Answer:2 ¼ m is the length of each piece of the rope
=============================Hope it helps
=============================pls help is it A. B. C. D.
Answer:
C
Step-by-step explanation:
Hope I was able to help!! :)
Which holiday showed greater variability in the
data?
Answer:
christmas
Step-by-step explanation:
2. {At the grocery store, Marilyn bought 4 apples and 7 oranges. Select two ways she could write the ratio of apples to oranges.} {3. There are 12 inches in 1 foot. How many inches are in 12 feet?} {4. Alexa is making a bracelet using beads. She uses 1 red bead for every 5 silver beads. If she uses a total of 20 silver beads, how many red beads does she use?}* {5. Peter is assembling gift bags for his birthday party. For every two Hershey candy cars he puts in each bag, he puts 3 lollipops. He decides to put six Hershey candy cars in one bag. How many lollipops does he put in the same bag?} Whoever can answer these questions you are amazing!!! And I give you 50 points =D
Answer:
I'm really sorry I wish I could give you the right answer but maybe if you like put it in like different parts cause it's like I can't read it to sa jumbled up but I will answer you if you put it in different parts please
(n-2) x M when n=5 and m=9
Answer:
27
Step-by-step explanation:
2. Graph the function:
f(x) = -2/3x+1
Answer: Slope=-2/3
Step-by-step explanation:
HELP I don’t understand
Answer:
D. y <= -x+2
Step-by-step explanation:
I used desmos and put all four then determined which one matched
If an investment's value can be modeled with A= 325 (1+.027/12)^12t
then which of the following describes the investment?
Answer:
Step-by-step explanation:
It's an investment that has a nominal interest rate of 2.7% compounded monthly
3. The investment has a nominal rate of 27% compounded 12 times per year
Given that,
The investment value should be [tex]A= 325 (1+.027\div 12)^12t[/tex].Based on the above information, the information is as follows:
The above formula represent that the investment should have the nomibal rate of 27% that compounded 12 times per year.
Learn more: brainly.com/question/17429689
Write the equation of a line with a slope of -7/2 passing through the point 2,-4
Answer:
y = -7/2x+3
Step-by-step explanation:
The slope intercept form of a line is
y = mx+b where m is the slope and b is the y intercept
y = -7/2 x+b
Substitute the point into the equation
-4 = -7/2(2) +b
-4 = -7+b
Solving for b
-4+7 = -7+b+7
3 = b
The equation is y = -7/2x+3
(6.3x10^3)x(7x10^-5) in standard form
please answer asap
Answer:
0.441
Step-by-step explanation:
[tex](6.3 \times 10^3) \times (7 \times 10^{-5} ) \\ \\ = 6.3 \times 7 \times 10^3\times 10^{-5} \\ \\ = 44.1 \times {10}^{3 - 5} \\ \\ = 44.1 \times {10}^{ - 2} \\ \\ = 0.441 [/tex]
PLEASE HELP! I NEED A WRITTEN RESPONSE. WILL GIVE BRAINLIEST
Answer:
The more they seem to change the more they stay the same.
math work please help wioth my math
Answer:
Figure A is scalene and probably obtuse.
Figure B is scalene and right.
Figure C is equilateral and acute.
Figure D is isosceles and right.
Figure E is isosceles and acute.
I am so sorry if I did a few wrong, I'm in Middle-School so I don't know much. I hope I get everything correct!
Answer: Figure A is scalene and probably obtuse.
Figure B is scalene and right.
Figure C is equilateral and acute.
Figure D is isosceles and right.
Figure E is isosceles and acute.
Step-by-step explanation:
Numbers 6 , 3 , (X – 4) are length of sides of an isosceles triangle , X =
Helpppp me plzzzzzzzzzz
Answer:
it is correct
Step-by-step explanation:
trust ur gut
Answer:
you have to correct answer
Step-by-step explanation:
just convert the square roots and fractions to whole numbers and then put them from least to greatest
solve for X
Please help
Answer:
x = 5
Step-by-step explanation:
set JN and NL equal to each other...
14x – 17 = 3x + 38
11x = 55
x = 5
Picture below...........
Answer: The correct answer is B.
Step-by-step explanation:
What is the area or the figure below? THE FIRST TO ANSWER GETS MARKED AS BRAINLIEST
Answer:
168 in.²
Step-by-step explanation:
it is the correct answer
Helping me would be very appreciated.
Answer:
B I used Desmos to graph it and this was the same as the picture
Step-by-step explanation:
what is 5 to the power of 6 over 5 to the power of 2
Answer:
625
Step-by-step explanation: 5^6/5^2
multiply 5^6 and than devide your answer with 5^2
Answer:
625
Step-by-step explanation:
5^6=15625
5^2=25
15625/25=625
: Susan bought a 6-month $1,400 certificate of deposit. At the end of 6 months, she
received $126 simple interest. What annual rate of interest did the certificate pay?