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
Vikentia [17]
3 years ago
5

Brittany surveyed the students in three different Chemistry classes regarding the average number of hours of sleep they get each

night. She calculated the mean and standard deviation, SD, of the data and recorded the results in the table below.
Class A
Mean = 7.35
SD = 2.92

Class B
Mean = 6.87
SD = 3.65

Class C
Mean = 8.14
SD = 3.10
Use the information provided to complete the following statement.

Class ( A, B, C) shows the most consistency in the number of hours slept per night because the(standard deviation, mean) is the (highest, lowest).
Mathematics
2 answers:
Otrada [13]3 years ago
7 0

Answer:

Class A shows the most consistency in the number of hours slept per night because the standard deviation is the lowest.

Step-by-step explanation:

The standard deviation of a set measures how close the measures of this set are, that is, how consistent they are.

The lesser the standard deviation is, the higher the consistency is.

In this problem, we have that:

Class A has the lowest standard deviation.

So:

Class A shows the most consistency in the number of hours slept per night because the standard deviation is the lowest.

aalyn [17]3 years ago
6 0
Class B has the most consistant sleep because there is less of a difference between 6.87 and 3.65 than the other classes.
You might be interested in
The vertical height v, in feet, of a snowboarder jumping off of an overhang can be modeled by the function h(t)=15-10t-16t^2, wh
olga55 [171]
I don't know for sure, but I think there might be an error in the way you copied your function. In all of my dealings with these types of problems, I have learned the formula to be h(t) = 15 + 10t - 16t^2. Notice the plus in front of the "10t". This is due to the fact that if he pushes off of the overhang he would have an upward force of 10 feet per second as soon as his feet left the ground. The only thing pulling him back to Earth is gravity, modeled by the "-16t^2". This is derived from a bit of slightly advanced physics involving the gravitational constant, but let's work under my formula for a second...

Either way, we will wind up using the Quadratic Formula (or possibly factoring if the numbers are easy enough to work with). So let's start. 

h(t)= 15 +10t - 16t^2

In order to use the QF or factoring I will need to make h(t)=0. Simply done by:

0= 15 +10t -16t^2

Looking at the numbers, I'd prefer to use the QF so here it is:

x= \frac{-b + or -  \sqrt{b^{2}-4ac } }{2a}

I know that my answer will need to be positive since you can't have a negative value when dealing with time, so I will eliminate the positive sign from the "+or-" part leaving me with:

x= \frac{-b -\sqrt{b^{2}-4ac } }{2a}

And I know that a= -16, b= 10, and c=15. So all that's left to do is substitute and solve.

x= \frac{-10 -\sqrt{-16^{2}-4*-16*15 } }{2*-16} 

There's a decent amount of math that would be difficult and sloppy for me to do over the computer, but all you need to do is solve the rest of the equation and you would get your answer.

Exact answer: \frac{5-4 \sqrt{15} }{8} or rounded answer: ≈1.31 seconds.

Hope this helps!
NoThisIsPatrick

7 0
3 years ago
Read 2 more answers
You want to help make snow cones at your school fair. Each paper cone has a radius of 4.5 centimeters. The height of one cone is
skad [1K]
Hello there.

You want to help make snow cones at your school fair. Each paper cone has a radius of 4.5 centimeters. The height of one cone is 8.3 centimeters. What is the volume of one cone? Use 3.14
176.01

3 0
3 years ago
50 POINTS please help me I really need it
Mars2501 [29]

A Domain is the lowest and highest x value (-5,-2) is how it is formatted this means -5 to -2

Range is the lowest to highest Y value so (-3,3)

(-5,-2) - domain

(-3,3) - range

B Intercept are when the line crosses the acis labeled x so

(-2,0) and (2,0)

C F(1) means what is x when y is equal to 1 so we must estimate this

(-1,1) and (1.5,1)

D f(x) = -3 is when y is -3 so we look at the graph to see

-5 and 4 are the values for x

E f(x) < 0 means when y is above the x axis

This is between the x values of -2 and 2 or (-2,2)


7 0
3 years ago
6/5<br><br> 36/25<br> Find the 10th term.
harina [27]

Answer:

36/25=1 and 11/25  6/5=1 and 1/5

Step-by-step explanation:

booooooooooooooo

5 0
2 years ago
Evaluate 2 + 4/5 n for n = 1/4
Sophie [7]

Answer:

2\frac{1}{5}

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • Skylar needs to buy a pair of dress pants for $40, a shirt for $30, and a tie for $20. Skylar has three coupons. The first coupo
    12·2 answers
  • A random sample of 7th grader students are surveyed about their eye color. The result is 12 blue 2 green, 58 brown and 8 hazel.
    7·1 answer
  • Pls answer ASAP will mark brainliest if correct
    13·2 answers
  • there are 495 students in a senior class. The cost of a senior trip is $120 per student. write an expression that can represent
    10·2 answers
  • Harry Potter books have become popular with children and adults alike. A recent survey conducted in London revealed that 64% hig
    12·1 answer
  • Z2-y2=x2 solve for z2 (literal equation)
    9·1 answer
  • Lincoln is working two summer jobs, making $13 per hour lifeguarding and $23 per hour tutoring. Last week Lincoln earned a total
    9·1 answer
  • An object is thrown down with an initial velocity of 8 ft/sec. When will the object have fallen 120 feet?
    7·1 answer
  • Someone the answer pls
    14·1 answer
  • Hey! i’ll give brainliest please help
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!