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Advocard [28]
3 years ago
10

the mean height of a group of 500 nonsmoking college students is 74 inches and the standard deviation is 5 inches. what is the p

robability that in a random sample of 25 students from this group, the average height will be between 73 and 75 inches?
Mathematics
1 answer:
Novosadov [1.4K]3 years ago
3 0
Based on the given description above, I have analyzed it and come up with a solution to get the probability if in a random sample of 25 students from this said group and the average height is between 73 and 75 inches. So if you calculate it, it will be like this: 
<span>2P(Z<2)−1</span> To find the probability of Z, use the normal distribution table.
The value for Z being less than 2 is 0.9772. The final result is then<span><span>2(0.9772)−1=0.9544
Hope this is the answer that you are looking for.</span></span>
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Y-3x=-2<br> 3x=y+6<br> Solve system..
LenKa [72]

Answer:

This equation system has no answer

Step-by-step explanation:

y - 3x =  - 2..................(1) \\ 3x -y = 2.....................(2) \\ 3x = y + 6.....................(3) \\ 3x - y = 6.....................(4) \\ (4) - (2) \\ 0 = 4

3 0
3 years ago
Benny was told to practice playing piano for 4/11 of an hour per day. Benny has already played 3/14 of an hour today. How many h
alekssr [168]
Solution:

4/11 = 0.36

3/14 = 0.21

He still needs to play 0.15 of an hour or 3/20 of an hour.


Given facts - Amount he has to play, and the amount he played.
Question - For how long does he need to practice to meet the required time.
Hidden question - There is nothing hidden
Operations used -  divisions (not necessary), subtractions and conversion (only if used division).
Number sentence - 4/11 - 3/14 = x
Answer - 3/10 of an hour.


Hope it helped,

Happy homework/ study/ exam!





5 0
2 years ago
30 points and brainliest!! HELP NOW
Natasha2012 [34]

Answer:

First question

a = 1 , h = 0 , k = 6 ⇒ third answer

Second question

y = 2x² + 4 ⇒ second answer

Third question

No of the choices correct ⇒ fourth answer

Step-by-step explanation:

First question

∵ f(x) = x² + 6

- It is a quadratic function with general form ax² + bx + c

- Its vertex is (h , k), where h = -b/2a and k = f(h)

∵ a = 1 , b = 0 , c = 6

∴ h = 0/2(1) = 0

∴ f(0) = 0² + 6 = 6

∴ a = 1 , h = 0 , k = 6 ⇒ third answer

Second question

- If the function f(x) translated vertically up  

 by k units, then the new function g(x) = f(x) + k

- If the function f(x) translated vertically down  

 by k units, then the new function g(x) = f(x) – k

∵ y = 2x²

∵ y is shifted 4 units up

∴ k = 4

∴ y + 4 = 2x² + 4

∴ y = 2x² + 4 ⇒ second answer

Third question

∵ y = -2x² + 3

- It is a quadratic equation with general form ax² + bx + c

- It represented graphically by parabola

- If a is positive the parabola opens upward

- If a is negative the parabola opens downward

∵ a = -2

∴ The parabola opens downward

∴ No of the choices correct ⇒ fourth answer

4 0
3 years ago
Amount of money you earn per hour if you make d dollars in 15 hours??
KATRIN_1 [288]
The answer to the question is d/15
7 0
3 years ago
“The amount y (in cups) of flour is proportional to the number x of eggs in a recipe. the recipe calls for every two eggs. inter
masha68 [24]

Answer:

A. y=3/2x

B. y=3/2x

C. 18

 

i did this with my sister

8 0
2 years ago
Read 2 more answers
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