1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
irga5000 [103]
3 years ago
6

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?
Mathematics
2 answers:
LiRa [457]3 years ago
8 0

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

Lilit [14]3 years ago
3 0

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

You might be interested in
Greg feeds his dog 2/3 pounds of dog food for each meal. Greg has just bought 18 pounds of dog food. For how many meals will the
yan [13]
We can divide 18 pounds by 2/3 pounds to find how many servings of meals the dogs will have.
We will use the keep change flip rule to solve this.
18 / 2/3 is then the same as 18 x 3/2
We then multiply across to get
54/2
This would be 27 meals that the food will last
3 0
3 years ago
X-2y=-26 x-y=-2 solution of systems equation
svp [43]
If we subtract the 2 equations we eliminate x:-

x - x - 2y - (-y) = -26--2
-y = -24 
 y = 24
Plug this into the first equation:-
x - 2(24) = -26
x = -26 + 48  = 22


Answer is x = 22 and y = 24
4 0
3 years ago
A problem states “ there are nine more children than parents in a room. There are 25 people in the room and all. How many childr
11Alexandr11 [23.1K]

Answer:

D

Step-by-step explanation:

If C represents the number of children you aren't gonna want to multiple like how it shows in option b and you aren't gonna wanna subtract.

6 0
3 years ago
Jason plans to pay the water bill with two equal payments
djyliett [7]
Since the water bill costs $35, to split it into 2 equal payments, you would simply just half $35 which is $17.50.
7 0
3 years ago
Si el valor de entrada es el nombre y el valor de salida es la letre con la que empieza
kiruha [24]

Answer:

lol warknvvfjbvbbvcbb

3 0
3 years ago
Other questions:
  • Which is the smallest 0.37 0.194 0.6 0.473 0.29
    8·2 answers
  • The volume of a sphere is 36Ï€ in³. what is the radius of the sphere?
    15·1 answer
  • PLEASE PLEASE HELP ME I NEED THE ANSWER ASAP!
    7·2 answers
  • kevin has a rectangular-shaped garden its 15 feet by 12 feet wide he plants 36 square feet of tomatoes what percent of the garde
    10·1 answer
  • Difference between 4/5 and 6/8
    13·1 answer
  • What characteristics of these geometric figures create the different requirements?
    13·1 answer
  • Technetium-99m is used as a radioactive tracer for certain medical tests. It has a half-
    5·1 answer
  • Which number is composite? 11,2,9,5​
    5·2 answers
  • An airplane is flying in a direction of 75° north of east at a constant flight speed of 300 miles per hour. The wind is blowing
    11·1 answer
  • Please help with geometry
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!