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
gregori [183]
1 year ago
5

a study was to be undertaken to determine if a particular training program would improve physical fitness. an srs of 31 universi

ty students was selected to be enrolled in the fitness program. one important measure of fitness is maximum oxygen uptake. measurements of oxygen uptake in untrained individuals are known to follow a normal distribution with a mean of begin mathsize 16px style mu end style
Mathematics
1 answer:
Nataliya [291]1 year ago
3 0

Step-by-step explanation:

A study was to be undertaken to determine if a particular training program would improve physical fitness. A sample of 31 university students was selected to be enrolled in the fitness program. The researchers wished to determine if there was evidence that their sample of students differed from the general population of untrained subjects. The sample mean is 47.4 and a standard deviation of 5.3. The 98% confidence interval is determined and is given as, (45.2, 49.6) .

If the level of confidence is changed to 95%, then the confidence interval will become shorter but the p-value will not change because it is calculated using the test statistic. So the correct answer is (a).

You might be interested in
Which of the following climates regions tends to have short grasses and shrubs that receive little rain A.tropical wet and dry B
GREYUIT [131]
Semiarid, 

Source: Quizlet Science lesson 21 Climate Regions
8 0
3 years ago
Read 2 more answers
If f(x)=x2+1, then (f∘f)(x)=
PSYCHO15rus [73]

The resulting composite function (f∘f)(x) is x⁴+2x²+2

When a function is written inside another function, it is known as a composite function

Given the function f(x)=x²+1,

(f∘f)(x) = f(f(x))

f(f(x)) = f(x²+1)

This means we will need to replace x with x²+1 in f(x) as shown:

f(x²+1) = (x²+1)²+1

Expand

f(x²+1) = x⁴+2x²+1+1

f(x²+1) =  x⁴+2x²+2

Hence the resulting composite function (f∘f)(x) is x⁴+2x²+2

Learn more here: brainly.com/question/3256461

3 0
2 years ago
Marvin earns $8.25 per hour at a summer job. He wants to buy a video game system that cost $206.25 write an equation to model th
Olin [163]
Amount Earned (E) = 8.25*Hours (H)

Since he wants to buy a game system you can also write this as an inequality, if the amount of the game system has any relevance in the problem.
8.25*H >= 206.25 
8 0
3 years ago
If CDE ~ GDF, find ED
qaws [65]

Answer:

10

Step-by-step explanation:

\triangle CDE \sim \triangle GDF.. (given) \\\\\therefore \frac{CD}{GD} =\frac{DE}{DF}.. (csst) \\\\\therefore  \frac{15}{x+3} =\frac{3x+1}{4}\\\\ \therefore   \: 15 \times 4 = (x + 3)(3x + 1) \\  \\ \therefore   \: 60 = 3 {x}^{2}  + x + 9x + 3 \\  \\ \therefore  3 {x}^{2}  + 10x + 3 - 60 = 0 \\ \therefore  3 {x}^{2}  + 10x  - 57 = 0 \\ \therefore  3 {x}^{2}  + 19x - 9x  - 57 = 0 \\ \therefore   \: x(3x + 19) - 3(3x + 19) = 0 \\\therefore   \:  (3x + 19)(x - 3) = 0 \\ \therefore   \: 3x + 19 = 0 \:  \: or \:  \: x - 3 = 0 \\  \therefore   \: x =  -  \frac{19}{3}  \:  \: or \:  \: x = 3 \\  \because \: x \: can \: not \: be \:  - ve \\ \therefore   \: x = 3 \\ ED = 3x + 1 = 3 \times 3 + 1  \\ \huge \red{ \boxed{ ED= 10}}

7 0
3 years ago
What is the area of a rectangle with a length of 9 and a width of 17?
ikadub [295]

Answer:

153 units squared

Step-by-step explanation:

To solve, multiply your length by your width.

A=lw\\A=9(17)\\A=153

5 0
3 years ago
Read 2 more answers
Other questions:
  • How do you find the midpoint M?
    8·2 answers
  • Do you think that two negative integers could have the same difference as two positive integers? why or why not
    6·2 answers
  • 121 is 55% of what number?<br><br>A.) 220<br>B.) 121<br>C.) 66.55<br>D.) 242
    8·1 answer
  • Felipe earns 5% commission on his sales at Best Buy. One week his sales totaled $9,650. What was his commission for the week?
    9·1 answer
  • How do you find this missing side
    12·2 answers
  • Find the geometric mean between each pair of numbers. 256 and 841
    15·1 answer
  • What are the factor of these numbers,
    9·1 answer
  • Match the unknown angle majors scroll over each angle for a clear image​
    14·1 answer
  • Combine and simplify the following radical expression. 2/3 3r5
    8·1 answer
  • 6
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!