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
Ilya [14]
3 years ago
7

The pregnancy length in days for a population of new mothers can be approximated by a normal distribution with a mean of 269 day

s and a standard deviation of 8 days. ​(a) What is the minimum pregnancy length that can be in the top 12% of pregnancy​ lengths? ​(b) What is the maximum pregnancy length that can be in the bottom 3​% of pregnancy​ lengths?
Mathematics
1 answer:
fenix001 [56]3 years ago
6 0

Answer:

a) 279 b)254

Step-by-step explanation:

Mean = 269 days

standard deviation = 8 days

let n be the pregnancy lenght.  

using normal distribution formula

z = (n – mean)/ standard deviation

n = z * standard deviation + mean

Now, z values for the top 12% has to be found using a z table.

The top 12% means 88% of area under the curve. In this case z = 1,176

n = 1,176 * 8 + 269

n = 278.4 = 279

The bottom 3% means 97% of area under the curve. In this case z = -1,882

n = -1,882 * 8 + 269

n = 253.94 = 254

You might be interested in
I do try to give fre e poi nts when i can, so be sure to follow me!
Zanzabum

Answer:

Thxs

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
I am thinking of two numbers.
taurus [48]

Answer:

6 and 8

Step-by-step explanation:

6+8=14 difference 2

5 0
2 years ago
Read 2 more answers
Can anyone help me? Please?
maw [93]

Answer:

Its C because each % is not one student

Step-by-step explanation:

8 0
3 years ago
How do you write 0.045 as a reduced fraction
Anvisha [2.4K]
0.045 = 45/1000

Divide top and bottom by their greatest common factor.
It looks to me as though the greatest common factor of  45  and  1,000  is  5 .
Divide top and bottom by  5  and we have  <u>9/200</u> .  That's the simplest form.
6 0
3 years ago
Read 2 more answers
6700 dollars is placed in an account with an annual interest rate of 8%. How much will be in the account after 24 years, to the
goldenfox [79]

Answer:

Step-by-step explanation:

The answer depends on whether the interest is simple or compound.

For simple interest:

A = 670(1 + 0.08)(24)

For compound interest

A = 670(1 + 0.08)24

5 0
3 years ago
Read 2 more answers
Other questions:
  • What would a 20% increase of 25.9 be? I think it'd be 77.22 but not quiet sure
    15·2 answers
  • Is f(g(13))? 16 26 32
    12·1 answer
  • Helppppppppppppppppppppppp
    12·1 answer
  • Write 27/64 in the simplest form
    8·2 answers
  • PLEASE HELP ASAPPPPPPPPPP <br> plsss do the both questionsssssss
    15·1 answer
  • Factor out the gcf 9m - 12<br>help​
    13·2 answers
  • Which is greater 16/12 or 9/3
    14·2 answers
  • A machine that bottles apple juice is set so that every 6th bottle gets a red label and every 9th bottle gets a blue cap . What
    14·1 answer
  • If x = , what is the value of the following expression?
    12·1 answer
  • Male and female high school students reported how many hours they worked each week in summer jobs. The data are represented in t
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!