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
victus00 [196]
3 years ago
8

A movie theater conducted a survey of its customers. Twelve people were selected at random and asked how many times they had gon

e to a movie theater in the past month. The movie theater recorded the results.
1, 4, 2, 7, 3, 11, 3, 5, 1, 1, 1, 3

What was the estimated mean number of movies a customer has seen?

A. 1
B. 3
C. 3.5
D. 4.3
Mathematics
1 answer:
Mila [183]3 years ago
7 0
Here, you know that 12 people answered.

Therefore :

Take the "M" for mean :

M= \frac{1+4+2+7+3+11+3+5+1+1+1+3}{12}
M= \frac{42}{12}
M = 3.5

In short, you answer would be C. 3.5.

Hope this helps !

Photon

You might be interested in
Let X denote the number of flaws along a 100-m reel of magnetic tape (an integer-valued variable). Suppose Zdenote the number of
Lemur [1.5K]

Answer:

a) P(20 \leq X \leq 30) = P(20-0.5 \leq X \leq 30+0.5)

P(19.5 \leq X \leq 30.5) = P(\frac{19.5-25}{5} \leq Z \leq \frac{30.5 -25}{5})=P(-1.1 \leq Z \leq 1.1)

And we can find this probability like this:

P(-1.1 \leq Z \leq 1.1)= P(Z\leq 1.1) -P(Z\leq -1.1) = 0.864-0.136= 0.728

b) P(X \leq 30)= P(X

And using the z score we got:

P(X

c) P(X

And if we use the continuity correction we got:

P(X

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Continuity correction means that we need to add and subtract 0.5 before standardizing the value specified.

Part a

Let X the random variable that represent the variable of interest of a population, and for this case we know the distribution for X is given by:

X \sim N(25,5)  

Where \mu=25 and \sigma=5

Part a

For this case we want to find this probability:

P(20 \leq X \leq 30) = P(20-0.5 \leq X \leq 30+0.5)

And if we use the z score given by:

z =\frac{x-\mu}{\sigma}

We got this:

P(19.5 \leq X \leq 30.5) = P(\frac{19.5-25}{5} \leq Z \leq \frac{30.5 -25}{5})=P(-1.1 \leq Z \leq 1.1)

And we can find this probability like this:

P(-1.1 \leq Z \leq 1.1)= P(Z\leq 1.1) -P(Z\leq -1.1) = 0.864-0.136= 0.728

Part b

For this case we want this probability:

P(X \leq 30)

And if we use the continuity correction we got:

P(X \leq 30)= P(X

And using the z score we got:

P(X

Part c

For this case we want this probability:

P(X

And if we use the continuity correction we got:

P(X

3 0
3 years ago
What is s?? <br> A 44° <br> B 35.3° <br> C. 37.9°<br> D. 22°
melisa1 [442]

Answer: Choice B) 35.3 degrees

======================================================

Work Shown:

Apply the law of sines

sin(S)/s = sin(R)/r

sin(S)/16 = sin(120)/24

sin(S) = 16*sin(120)/24

sin(S) = 0.57735026918962

S = arcsin(0.57735026918962)

S = 35.2643896827542

S = 35.3

Make sure your calculator is in degree mode.

7 0
2 years ago
Multiple choice ! pls help
ZanzabumX [31]
The right answer is c
7 0
3 years ago
Solve this math problem -2 1/3-(-5)= ​
dmitriy555 [2]

Answer:

8/3 or 2.6 repeating

4 0
3 years ago
Read 2 more answers
Find a fraction with a demominator of 30 that is equivalent to 1/3
Harman [31]

Answer:

10/30

Step-by-step explanation:

First, multiply the denominator by 10 to make 30.

Then, since we multiplied the denominator, we multiply the numerator. 1 x 10= 10

Therefore the answer is 10/30.

4 0
3 years ago
Other questions:
  • Identify the like terms.
    7·1 answer
  • What is the leading coefficient of the polynomial?<br><br> 12 − 6x3 − 9x2 − 15x
    15·2 answers
  • you she just bought living room carpet which is 20 feet long by 15 feet wide. If carpet is $6.00 per square foot, how much did t
    15·2 answers
  • What's the simplest form 1.4/7
    13·2 answers
  • Please helpim not great at math.
    5·2 answers
  • What is the quotient of 0.6÷243​
    15·1 answer
  • Pls answer im not good with rectangles
    6·2 answers
  • Please help me i will mark as brainliest ​
    6·1 answer
  • Which expression is equivalent to the expression shown below?
    6·1 answer
  • WILL GIVE BRAINLIEST!!
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!