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
mars1129 [50]
3 years ago
6

I will mark brainliest to whoever has the best answer

Mathematics
1 answer:
gogolik [260]3 years ago
3 0

Answer:

REPOST YOURE PICTURE

Step-by-step explanation:

You might be interested in
The mean finish time for a yearly amateur auto race was 186.32 minutes with a standard deviation of 0.305 minute. The winning​ c
uranmaximum [27]

Complete Question

The mean finish time for a yearly amateur auto race was 186.94 minutes with a standard deviation of 0.305 minute. The winning car, driven by Roger, finished in 185.85 minutes. The previous year's race had a mean finishing time of 110.7 with a standard deviation of 0.115 minute. The winning car that year, driven by Karen, finished in 110.48 minutes.

Find their respective z-scores.

 Who had the more convincing victory?

A. Roger​ had a more convincing victory because of a higher z-score.

B. Karen a more convincing victory because of a higher z-score.

C. Roger had a more convincing victory, because of a lower z-score.

D. Karen a more convincing victory because of a lower z-score.

Answer:

The correct option is  D

Step-by-step explanation:

From the question we are told that

  The mean of the current year  is  \mu_c =  186.32 \  minutes

   The standard deviation is  \sigma_c  =  0.305 \  minutes

   The time taken by  the winning car for the current year  is  x =  185.85 \ minutes

  The mean of the previous  year  is  \mu_p =  110.7 \  minutes

   The standard deviation the previous  year  is  \sigma_p  = 0.115  \  minutes

 The time taken by  the winning car for the previous year  is  y =   110.48 \ minutes    

Generally the z-score for current year is mathematically evaluated as

     z_c  =  \frac{x- \mu_c}{\sigma_c }

=>     z_c  =  \frac{ 185.85- 186.32}{0.305 }

=> z_c  = -1.536

Generally the z-score for previous year is mathematically evaluated as

     z_p  =  \frac{y- \mu_p}{\sigma_p }

=>     z_p  =  \frac{ 110.48-110.7}{0.115  }

=> z_p  = -1.913

From the value obtained we see that  z_p  <  z_c , Hence  Karen had a more convincing victory because of the lower z -score.

5 0
2 years ago
Sam raked 3 bags of leaves in 18 minutes. If he continues to work at the same rate, how long will it take him to rake 7 bags of
DedPeter [7]

Answer:

Step-by-step explanation:

hope it helps make brainliest

5 0
3 years ago
Read 2 more answers
What is the area of the firgure?
qaws [65]

Answer:

768

Step-by-step explanation:

4 0
3 years ago
Which fraction is equal to 1/5
erma4kov [3.2K]
Its either 2/10 or 5/25
3 0
3 years ago
Which of the following statements represents a mathematical expression?
4vir4ik [10]
A because there is a difference between a expression and equation. Expressions don’t have a equal sign or an answer. But equations have an equal sign and an answer. So because everything else has an answer or equal sign, the correct answer would be A. Hope this helps!
5 0
3 years ago
Read 2 more answers
Other questions:
  • Write a # where the value of the 4 in the thousands place is x1/10 the # 854,093
    10·1 answer
  • Can someone help me with this? Having a hard time..as usual
    10·1 answer
  • Given: AB is the diameter of circle O. Prove: AC and BD are tangents. Statement and Reason.
    11·2 answers
  • 4) From a graphed linear line, how do you find the<br> Slope:<br> Y-intercept:
    13·1 answer
  • Hey please I need help with this
    15·1 answer
  • How to round 106.327 to nearest hundredths explain
    15·2 answers
  • (QUICK I NEED HELP)
    13·2 answers
  • WILL MARK BRAINLYIST
    13·1 answer
  • What is the answer? pls
    11·1 answer
  • Directions: From the graph, write the linear equation in slope-intercept form
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!