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
Ira Lisetskai [31]
4 years ago
7

A store owner is interested in opening a second shop. She wants to estimate the true average daily revenue of her current shop t

o decide whether expanding her business is a good idea. The store owner takes a random sample of 60 days over a six-month period and finds that the mean revenue of those days is 3,472.00 dollars with variance 315,900.20 square dollars. Calculate a 95% confidence interval to estimate the true average daily revenue.
Mathematics
1 answer:
Alex4 years ago
6 0
Every confidence interval has associated z value. As confidence interval increases so do the z value associated with it. 
The confidence interval can be calculated using following formula:
\overline{x} \pm \frac{zs}{\sqrt n}
Where \overline{x} is the mean value, z is the associated z value, s is the standard deviation and n is the number of samples.
We know that standard deviation is simply a square root of variance:
s=\sqrt{315900.20}=\$562.05
The confidence interval of 95% has associated z value of <span>1.960.
</span>Now we can calculate the confidence interval for our income:
3472.00\pm \frac{1.960\cdot 562.05}{\sqrt{60}}\\ \$3472.00\pm142.22


You might be interested in
The probability distribution below shows the number of kittens in a litter, Find the probability that a cat will have at most 4
zalisa [80]
Plz help I’m getting timed
4 0
3 years ago
Read 2 more answers
Complete the statement with the appropriate symbol. 1.42 _____ 1.420
nata0808 [166]
1.420 is bigger because you added a zero to it and that makes it in the Hundredths and in 1.42 the 2 is in the tenths place
8 0
3 years ago
Read 2 more answers
What is the value of 2 to the power of 4 plus 3 to the power of 2-5
vitfil [10]

The Answer is 20. Just take my word for it its 20

3 0
3 years ago
Read 2 more answers
White three measurements using Grams and three measurements using Milligrams that total 15.4 grams.
zhuklara [117]
1 gram = 1000 milligrams

a) You can pick any 3 <u>gram</u> numbers that add to 15.4 grams
For example, 5 , 3, 7.4 = 15.4 grams

a) You pick any 3  <u>milligram</u> numbers that add to 15.4 grams (or 154,000 milligrams)
For example, 50,000, 70,000, 34,000 = 154,000 milligrams


4 0
4 years ago
Help me pls what is the rate of change and the function​
KengaRu [80]

Answer:

Step-by-step explanation:

Rate of change of a function between x = b and x = a,

Rate of change = \frac{f(b)-f(a)}{b-a}

From the given table,

Rate of change of the given function between x = 3 and x = 5,

f(5) = -26

f(3) = -2

Rate of change = \frac{-26+2}{5-3}

                          = -12

Since, rate of change for the given function is constant, function is a linear function.

8 0
3 years ago
Other questions:
  • AYE HELP ME THANKS A LOT
    10·1 answer
  • Which pair of numbers has a GCF of 6?<br> 1. 12 and 24<br> 2. 3 and 18<br> 3. 6 and 12
    7·1 answer
  • (30 points) HELP PLEASE!!!!
    11·2 answers
  • Explain why an inverse variation function is not the best model for the data set​
    8·1 answer
  • What is the y-intercept of the line shown? (4 points) A. 3/4 B.2 C. 3 D.4a
    8·1 answer
  • I need help quick!!
    6·1 answer
  • Suppose y varies directly with x. Write an equation if y=75when x=25
    13·1 answer
  • -10y + 9x = -9<br> 10y + 5x = -5
    11·1 answer
  • Which pair of angles are alternate exterior?????
    5·1 answer
  • Classify the following triangle. Check all that apply. A. Isosceles B. Scalene C. Obtuse D. Acute E. Equilateral O F. Right ​
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!