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
Basile [38]
3 years ago
6

Stan's heart rate, in beats per minute, was measured 20 times at random. The results are 82, 84, 98, 112, 97, 93, 91, 87, 112, 8

7, 79, 80, 72, 82, 94, 89, 89, 74, 80, and 72 beats per minute. Construct a 99% confidence interval for Stan's mean heart rate. (82.5659, 92.8341) (80.4942, 92.8341) (82.5659, 94.9052) (82.4288, 92.9712) (80.4942, 94.9052)
Mathematics
1 answer:
Licemer1 [7]3 years ago
6 0

Answer:

(80.4942, 94.9052)

Step-by-step explanation:

The sample mean is x = 87.7.

The sample standard deviation is s = 11.26.

At 99% confidence and 19 degrees of freedom, the critical value is t = 2.861.

The confidence interval is:

x ± t (s/√n)

87.7 ± 2.861 (11.26 / √20)

87.7 ± 7.2053

(80.4947, 94.9053)

You might be interested in
A cube has a volume of 216cm/3.what is the area of the base of the cube
Anettt [7]

Answer: 36 cm^2

Step-by-step explanation:

Hello!

We can start by finding the cube root of 216, which is 6. This is the length of each side of the cube.

Now, the area of the base of the cube is equal to 6^2=36 cm^2.

7 0
3 years ago
Read 2 more answers
Pls help! What's the answer?
Ivan

Answer:

The answer is b = 8a

Step-by-step explanation:

As, 0 x 8 = 0

2 1/2 = 5/2, 5/2 x 8 = 20

5 x 8 = 40

7 1/2 = 15/2, 15/2 x 8 = 60

10 x 8 = 80

13 1/2 = 27/2, 27/2 x 8 = 108

So all variables "a" when multiplied by 8 will give us the value in "b"

So b = 8a

4 0
2 years ago
Sorry to bother you, but I am STUGGLYINGGG
Y_Kistochka [10]
I think the answer is a
6 0
2 years ago
Read 2 more answers
Sam decides to build a square garden. If the area of the garden is 25x2 + 30x + 9 square feet, what is the length of one side of
seropon [69]
The correct answer is C. (5x+3) feet, and here is how I got it.
This is the equation you need to use:
(a+b)^2 = (a+b) (a+b)
So, let us plug in 5x and 3 here:
(5x+3)^2 = (5x+3)(5x+3) = 25x^2 + 15x + 15x + 9 = 25x^2 + 30x + 9 which is the area of the garden. 
5 0
3 years ago
Please help me with these two :/
serg [7]
The first answer is 80, and the second answer is still 65.5. Hope this helps!
3 0
2 years ago
Other questions:
  • HELPPP PLEASE!!!! SHOW ALL WORK!!!
    5·2 answers
  • suppose your friends parents invest $15000 in an account paying 6% compounded annually. what will the balance be after 8 years
    7·1 answer
  • Subtract, 43 min 50 s - 4 min 8 s 43 min 49 s 39 min 35 s d. 39 min 42 s b. 51 min 42 s Please select the best answer from the c
    8·1 answer
  • Which of the symbols correctly relates 25 and 35
    6·2 answers
  • What is the volume of the figure?
    14·1 answer
  • Can someone please help
    11·1 answer
  • !!!Plz help!!Choose the most appropriate name for the function described below.
    14·1 answer
  • Factor the expression.<br><br> 6x + 6
    14·2 answers
  • Pls help with algebra
    9·2 answers
  • Help me please these Recharf
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!