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
polet [3.4K]
3 years ago
12

The resting heart rate of US females 20 years old or older is normally distributed with a mean of 75 bpm (beats per minute). Sup

pose the standard deviation was 15 bpm. If one randomly selected female's resting heart rate falls in the bottom 33% of all women, at most what could her rate have been?
A. 70.05
B. 68.4
C. 79.95
D. 84.439
E. .6
F. 65.561
Mathematics
1 answer:
Sergio [31]3 years ago
7 0

Answer:

69 bpm

Step-by-step explanation:

Here we start out finding the z-score corresponding to the bottom 33% of the area under the standard normal curve.  Using the invNorm( function on a basic TI-83 Plus calculator, I found that the z-score associated with the upper end of the bottom 33% is -0.43073.

Next we use the formula for z score to determine the x value representing this woman's heart rate:

       x - mean                              x - 75 bpm

z = ----------------- = -0.43073 = --------------------

       std. dev.                                    15

Thus,  x - 75 = -0.43073(15) = -6.461, so x = 75 - 6.6461, or approx. 68.54, or (to the nearest integer), approx 69 bpm

You might be interested in
Mr Campbell has a jar on his desk that contains 1o0 marbles . At the end of class, each student draws a marble from the jar with
Yuliya22 [10]

Answer:

noseee  

Step-by-step explanation:

6 0
3 years ago
Find this in the graph g(-4) =
Radda [10]

Answer:

g(-4) = 1

General Formulas and Concepts:

<u>Algebra I</u>

  • Reading a Cartesian plane
  • Coordinates (x, y)
  • Function Notation

Step-by-step explanation:

What g(-4) is saying is what the output of the function g(x) when x= -4. According to the graph, when x = -4, y = 1.

∴ g(-4) = 1

5 0
2 years ago
How to solve for w ?<br> 53w+13&lt;56w+16
Vlada [557]

Answer:

w>-1

Step-by-step explanation:

53w + 13 < 56w + 16

-3 < 3w

-1 < w

8 0
3 years ago
Read 2 more answers
Simplify 6f+5g-3f+3g
VARVARA [1.3K]

Answer:

3f+8g

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
An American football field is 20 yards longer than a soccer field. An American football field is 120 yards long. How long is a s
Anni [7]

Answer:

A soccer field is 100 Yards.

Step-by-step explanation:

120-100=100yds.

5 0
2 years ago
Other questions:
  • A pile of 42 coins worth $4.90, consisting of nickels and quarters. How many nickels are there?
    10·1 answer
  • Jessica traveled to Portland by car. Going there took 3 hours, and the return trip lasted 6 hours. Jessica averaged a speed of 4
    13·1 answer
  • At the time of her​ grandson's birth, a grandmother deposits $ 7000 in an account that pays 10% compounded monthly. What will be
    12·1 answer
  • Solve for x:<br> 3/4 + 2/3 + 8/9 = 2 x/36<br><br> Algebra 2
    15·1 answer
  • What is the probability that a randomly selected number from 30 to 61 is divisible by 7 and then divisible by 20 after replacing
    8·1 answer
  • What is the value of x HELPPPPPPPPPP PLZZZZZZZZZZZZ
    6·1 answer
  • Pls answer and thanks!!
    8·2 answers
  • What percent of 180 is 30?
    15·1 answer
  • 1. Jose and Carlos received P 450 as prize for
    8·1 answer
  • Two and one-third times two and three-fourths.
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!