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
nignag [31]
3 years ago
10

During the last week of the semester, students at a certain college spend on the average 4.2 hours using the school’s computer t

erminals with a standard deviation of 1.8 hours. For a random sample of 36 students at that college, find the probabilities that the average time spent using the computer terminals during the last week of the semester is a) At least 4.8 hours (Draw the bell curve) b)
Mathematics
1 answer:
matrenka [14]3 years ago
4 0

Answer:

0.97725

Step-by-step explanation:

Given :

Population mean, μ = 4.2

Population standard deviation, σ = 1.8

Sample size, n = 36

Obtain the Zscore of x = 4.8

Zscore = (x - μ) ÷ (σ / √n)

Zscore = (4.8 - 4.2) ÷ (1.8 / √36)

Zscore = 0.6 ÷ 0.3

Z = 2

Hence,

P(Z ≤ 2)

Using the Z probability calculator :

P(Z ≤ 2) = 0.97725

You might be interested in
What is the answer of this question ?
fgiga [73]

Answer:

the answer is B

Step-by-step explanation:

hoped I helped:)

6 0
3 years ago
The distance between the tee and the pin (due west) on a par 3 hole of a golf course is 130 meters.
NikAS [45]

Answer:

I think it is 130 but I could be wrong... BUT I LOVE GOLF!!!

6 0
2 years ago
How to calculate standard deviation given mean and sample size?
ad-work [718]
In addition to mean and sample size you will need the individual scores.

The formula for standard deviation is:

S^2 = E(X-M)^2/N-1

Here's an example: 
Data set: 4,4,3,1
Mean: 3
Sample size: 4

First, put the individual scores one after the other and subtract the mean from it.
4 - 3 = 1
4 - 3 = 1
3 - 3 = 0
1 - 3 = -2

Second, square the answers you got from step 1. 
1^2 = 1
1^2 = 1
0^2 = 0
-2^2 = 4
Third, plug the values from step 2 into the formula. 

S^2 = (1+1+0+4)/(4-1) = 6/3 = 2

Standard deviation = 2
3 0
3 years ago
I need help fast i apperciate
Roman55 [17]

Answer:

Option d is the correct answer.

Step-by-step explanation:

tan A = 24/7

3 0
3 years ago
Read 2 more answers
5.Matrices M and N are shown below.
butalik [34]

Answer:

try c hope this helps

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • Which kind of function best models the data in the table?
    9·1 answer
  • PLEASE HELP ME (look at picture)<br>EXTRA POINTS!!!
    5·1 answer
  • NEED HELP NOW 100 POINTS!!!!!! WILL MARK BRAINLIEST!!!!!!!
    13·2 answers
  • While traveling at a constant speed in a car, the centrifugal acceleration passengers feel while the car is turning is inversely
    14·1 answer
  • Can someone help ASAP !!
    11·2 answers
  • Selina surveyed 150 people to find out which of five sports they prefer to watch TV on. The results of the survey are shown in t
    12·1 answer
  • What is the answer for this question above
    10·1 answer
  • What is the volume, in cubic inches, of a rectangular prism with a height of 19 inches, a width of 11 inches, and a length of 4
    10·1 answer
  • Work out: 27^-(1/3).
    7·1 answer
  • Which property can be used to solve the equation?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!