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
RoseWind [281]
3 years ago
12

The fitness center held a weight loss competition in which 128 people participated. The amount of weight loss was normally distr

ibuted with a mean of 18 pounds and a standard deviation of 5.4 pounds. Approximately how many people lost at least 15 pounds?
Mathematics
1 answer:
iris [78.8K]3 years ago
3 0

Answer:

37

Step-by-step explanation:

Given :

Sample size, n = 128

Mean, μ = 18

Standard deviation, σ = 5.4

Number of people who lost atleast 15 pounds :

The Zscore = (x - μ) / (σ)

Zscore = (15 - 18) / 5.4

Zscore = - 3 / 5.4

Zscore = - 0.5555

P(Z < - 0.555) = 0.28945

Number of people who lost atleast 15 pounds :

0.28945 * 128 = 37.0496

= 37 people

You might be interested in
For the point P(17.-9) and Q(24. - 4), find the distance d{P.Q) and the coordinates of the midpoint M of the
Elza [17]

Answer:

im pretty sure this is the answer :) ym = (y1 + y2)/2

Step-by-step explanation:

7 0
3 years ago
Please help me on this
Eddi Din [679]

Answer:

The correct answer is True.

Step-by-step explanation:

Altitude: vertical distance either between the top and bottom of something or between a base and something above it.

6 0
2 years ago
Read 2 more answers
Which expression is equivalent to 2^4 ⋅ 2^−7?
skad [1K]

2^4 x 2^-7 = 0.125

2^3 = 8, 1 /8 = 0.125


 answer is B

3 0
2 years ago
The soccer team voted on what they wanted to eat. There are 20 members on the team. Six members voted for pizza, 10 voted for ch
german
The answer is 2/5 because hot dog to chicken is 4/10 and if u simplify u get 2/5
5 0
3 years ago
Read 2 more answers
What is x2 + 2x + 9 = 0
vova2212 [387]

Answer:

x has no real solution

Step-by-step explanation:

Our equation is qudratic equation so the method we will follow to solve it is using the dicriminant :

  • Let Δ be the dicriminant
  • a=1
  • b=2
  • c=9
  • Δ= 2²-4*1*9 =4-36=-32
  • we notice that Δ≤0⇒x has no real solution

4 0
3 years ago
Other questions:
  • 7. 2626 write in a fraction to its simpliest form
    14·1 answer
  • Elisa made 0.44 of the free throws she attempted . What is that amount written as a fraction in simplest form
    11·1 answer
  • 6.12 = 5.36 + 4× i need help answering this problem
    5·1 answer
  • Help please? ASAP!!!!
    6·1 answer
  • PLEASE HELP ME PLEASE AS FAST AS POSSIBLE
    7·1 answer
  • Find the degree 3 Taylor polynomial P3(x) of function f(x)=(-3x+15)^(3/2) at a=2
    9·1 answer
  • Mary picks 15 flowers from her garden. If 3 out of 5 flowers are yellow how many yellow flowers does Mary pick
    13·1 answer
  • What is an equation of the line that passes through the points (-8, 2) and (-4, -3)?
    15·1 answer
  • PLEASE HELP! OFFERING ALL OF MY POINTS!!! I NEED ALL OF THE ANGLES AND I GET TO GO TO A CHARTER SCHOOL!!! I CANT FIGURE THIS OUT
    13·1 answer
  • a coin is flipped eight times where each flip comes up either heads or tails. how many possible outcomes: 1). are there in total
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!