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
denpristay [2]
3 years ago
14

A multinational firm wants to estimate the average number of hours in a month that theiremployees spend on social media while on

the job. A random sample of 83 employees showedthat they spent an average of 21.5 hours per month on social media, with a standard deviationof 2.5. Construct and interpret a 95% confidence interval for the population mean hours spenton social media per month.

Mathematics
2 answers:
elena55 [62]3 years ago
7 0

Answer:

95% of the population spent between 16.8 hours to 26.2 hours on social media per month

Step-by-step explanation:

  1. subtracting 1 from sample size: 83-1= 82
  2. Note Mean=21.5 and standard deviation=2.5
  3. Subtracting confidence interval from 1 and dividing by 2: (1-0.95)/2=0.025
  4. At α=0.025 and dF=82,  the t-distribution table gives  1.984
  5. Divide standard deviation by square root of sample size: 21.5/√83= 2.36
  6. Multiplying answer in step 4 by answer in step 5: 2.36×1.984= 4.68
  7. For lower end: 21.5-4.68= 16.82
  8. for upper end: 21.5+4.68=26.18

sasho [114]3 years ago
4 0

Answer:

20.96-22.0378

Step-by-step explanation:

For a 95% confidence interval the z value is 1.96

The confidence interval will be given by

Mean±z×б/√n

21.5-1.96×2.5/√83 =20.96

21.5+1.96×2.5/√83 =22.0378

With 95% confidence the average hours spent by employees on social media per hour is between 20.96 to 22.0378 based on this sample data

You might be interested in
1. 26% of students at a school own a dog, 22% own a cat and 6% own both. What proportion of
jekas [21]
I believe the answer is 42 % which would be .42
6 0
3 years ago
How many significant figures are in the number 12.001?
kramer
There are five significant figures in 12.001
3 0
3 years ago
The length of one leg of a right triangle is 24ft and the length of the hypotenuse is 40ft what is the length of the other leg
lukranit [14]
Use formula a squared equals to c squared minus b squared

40^2-24^2 is 1024

Square root of 1024 is 32.0
8 0
3 years ago
Read 2 more answers
HELP WITH FINANCIAL LIT--WILL MARK BRANLIEST--
Dominik [7]
1. Go on a vacation that costs $3,500 
Paying off money for buying a car will not decrease your net worth as you get the car as assets for the money you use. But the depreciates 20% will cause you to lose $3,000 assets. Assuming you are not buying assets at all, go on a vacation that costs $3,500 will increase liability without any effect on assets. Paying up bills will decrease your asset but it also decreases your liability so the net worth wouldn't change. 

2. 1) higher 2) lower
Subprime lending is lending money to people with a low credit score that was not really fit for the credit. This means the risk of getting the money back would be higher than prime lending. Since the risk of losing the money is higher, the interest should be higher than prime lending.

3. $200,000
The house price is $250k and the buyer put 20% down which is; 20%*$250k= $50k
Then the rest of the money that needs to be paid by the mortgage would be: $250k-$50k=$200k

4. Lower, Increase
In variable rate loans, the interest will be adjusted by the market. That means the rates will be unpredictable since it was based on the condition of the market. It will be safer for the creditor since he/she will absolutely get the revenue no matter how the market goes. This change is a bit dangerous for the borrower because the number of rates can increase dramatically. 

5. Higher, lower
When you pay 30 years mortgage, the total loan is divided by 30 years which was 2 times more than 15 years. Excluding the rates, you can estimate that the 15 years mortgage payment will be twice than 30years mortgage. The total cost would also be lower since the interest rate is applied for 15 years, about half than 30 years.

6. Negative $3,500
Net worth is assets minus liability.
The list of the assets would be: 
$500 in short-term savings
$5,000 in her retirement savings account
Total assets= $500+$5,000= $5,500

The list of liability would be:
$1,500 in credit card debt
student loan debt of $7,500

Total liability= $1,500+ $7,500= $9,000Net worth= $5,500- $9,000= - $3,500
3 0
3 years ago
Read 2 more answers
The graphs below show four functions: Graph A shows function f of x equals 4 multiplied by 3 to the power of x. Graph B shows fu
s2008m [1.1K]

Answer:

Graph B shows function f of x equals 4 multiplied by 3 to the power of negative x.

Step-by-step explanation:

f(x) = 4(3)^{-x} is the value 4 times three raised to the negative x. Graph B is the best representation.

5 0
3 years ago
Read 2 more answers
Other questions:
  • below is this graph of a trigonometric function, it intersects its midline at (8.7,7.2), and it has minimum point at (6.2,3.8)
    15·1 answer
  • A student scored 84 and 87 on their first two quizzes. Write and solve a compound inequality to find the possible values for a t
    12·1 answer
  • Give me 3 good ratios
    8·1 answer
  • in a game the probabilty that a spinner will land 3 is 2 fifths how many times would you expect to land on 3 if you spin the spi
    15·1 answer
  • Explain how to convert measurements in the metric system
    9·1 answer
  • A circle has a radius of 8x^6y^4 cm . The area of a circle can be found using a= πr2. What is the area of this circle in square
    5·1 answer
  • How is subtracting integers related to the addition of integers?
    11·1 answer
  • Find the surface area of the prism.<br> 7 mm<br> 4 mm<br> 5 mm
    7·1 answer
  • jane loves animals. She has an equal number of beetles, birds and spiders as pets. Apart from human legs, there is a total of 27
    12·1 answer
  • Help me pleaseeeeeeeeeeeeeeee
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!