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
Can someone help asap!! ​
Alborosie

7/9÷4/9=7/4

= 1/3/4

Hence, a=1, b=3, c=4.

hope it helps:)))

7 0
3 years ago
there is a direct path from gayle's house to the store. due to construction, the direct route is closed and gayle must travel 6
NikAS [45]

Answer:

c2=10

Step-by-step explanation:

8^2+6^2=c2

64+36=120

c2=square root of 120..which is 10

4 0
3 years ago
Read 2 more answers
How to make 7,502 only using hundreds , tens , and ones
s2008m [1.1K]
14 hundreds, 10 tens, and 2 ones.
4 0
3 years ago
Read 2 more answers
You fly in a helicopter for 20 minutes that goes at a speed of 240 km per hour. How far did you go?
kondaur [170]
80KM IN THOSE 20 MINUTES

7 0
3 years ago
Read 2 more answers
How do I find cube roots
anyanavicka [17]

Answer:

Step-by-step explanation:

5-500 is sqare 5

6 0
3 years ago
Other questions:
  • Just say answer, no need to explain! THANKSSS!
    5·1 answer
  • Factor completely...................
    15·1 answer
  • Round 18.194 to the place named tenth hundred ones
    15·1 answer
  • the axis of symmetry for a function in the form f(x)=x^2+4x-5 is x=-2. what are the coordinates of the vertex of the graph?
    11·2 answers
  • Please help as quickly as possible (20pts)
    8·1 answer
  • The fastest speed recorded for a cheetah is 70 mph. This is 11 mph less than 3 times the fastest running speed for a man. What i
    13·2 answers
  • State one practical use of variation related to health statistics.
    8·1 answer
  • Juanita borrowed $600 to purchase a new computer. She was charged 7% interest for two years. She used the simple interest formul
    11·1 answer
  • Please help me i do not want to fail my class
    14·2 answers
  • One tennis ball can holds 3 balls. Jenna filled 5 cans and had 1 ball left over.
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!