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
Verdich [7]
3 years ago
7

In order to estimate the average time spent per student on the computer terminals at a local university, data were collected for

a sample of 81 business students over a one-week period. Assume the population standard deviation is 1.8 hours.
The standard error of the mean is:

a) 7.50 b) 0.39 c) 2.00 d) 0.20
Mathematics
1 answer:
d1i1m1o1n [39]3 years ago
4 0

Answer: option D

Step-by-step explanation:

The formulae for standard error = standard deviation/√n

But population standard deviation = 1.8 and sample size = n = 81

Standard error = 1.8/√81 = 1.8/9 = 0.2

You might be interested in
Convert 11 milliliters to fluid ounces. Use 1 mL ≈ 0.034 fl oz.
VladimirAG [237]

Answer:

0.371954

Step-by-step explanation:

Formula- for an approximate result, divide the volume value by 29.574.

3 0
3 years ago
Read 2 more answers
Which of the following could be the equation for a parabola that opens down with the vertex (-11,-28)?
Mekhanik [1.2K]

Answer:y=-5(x+11)^2 -28

Step-by-step explanation: Okay think about what you know about translations and transformations of parent functions. In this case, the parent function is x2. So what now?

First, the problem states that the parabola opens DOWN. This means that you should look for a negative leading coefficient. This narrows your options down to C or D. (-5 is the leading coefficient)

Now starting with the x2, the vertex would be at (0,0), but in this problem it is at (-11,-28). That means it was TRANSLATED 11 spots in the negative x-direction and 28 spots in the negative y-direction.

Look at your options, when a number is being added directly unto the x variable, such as in answer C, it moves in the negative x-direction. This tells you that C has to be your answer.

I hope that helps!

8 0
3 years ago
12. What is the area of the quadrilateral?
ivolga24 [154]
The answer is A 100 square centimeters
4 0
2 years ago
Complete the equation of the graphed linear function in point-slope form.
BlackZzzverrR [31]
They are using the point (2, 8) to write this equation.  You know that because of the "y-8" in the equation, and also because it's bolded! lol.  Anyways, what's missing is the slope and the x value from our point.  The slope is -2.  Find this by picking 2 points on the line and putting those into the slope equation.  Use the bolded point and the x-intercept: (2,8) and (6,0):m= \frac{0-8}{6-2}= \frac{-8}{4}=-2.  As stated earlier the x coordinate in the bolded point is 2.  So our equation is y-8=-2(x-2).  And there you Go!
4 0
3 years ago
a recipe that make 10 mini loaves of banana bread calls for 1 1/4 cups flour . how much flour is needed to make 2 dozens mini lo
asambeis [7]

Answer:

0.25 or 1/4

Step-by-step explanation:

2 x 1 1/4 = 2 x 1.25 = 2.5 or 2 1/2

2.5 divided by 10 = 1/4 or 0.25

5 0
2 years ago
Other questions:
  • The product of a number and 7, decreased by the number is equal to 42. find the number.
    7·1 answer
  • What are the zeros of x2+5x-43=5x+6
    7·2 answers
  • How to solve 8× 10 rasied to the power of 4
    7·1 answer
  • What is the value of 3x squared when x = 2?
    8·2 answers
  • What is the range of f(x)= -2x+5 with domain {1,2,3,4}?
    9·1 answer
  • The volume of paint used, V liters, is directly proportional to the area, A square feet, that the paint can cover. 5 liters of p
    11·1 answer
  • HELP Whats the value of X ??
    14·1 answer
  • Math:hey everyone I have a quick question, Ps the picture is there!
    7·1 answer
  • Find the area of this semi-circle with radius, r = 66cm. Give your answer rounded to 1 DP.​
    7·1 answer
  • Use the Law of Sines to find each missing side or angle. Round to the nearest tenth.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!