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
ivann1987 [24]
3 years ago
11

A statistics instructor believes that fewer than 20% of Evergreen Valley College (EVC) students attended the opening night midni

ght showing of the latest Harry Potter movie. She surveys 84 of her students and finds that 11 of them attended the midnight showing. At a 1% level of significance, an appropriate conclusion is:
Mathematics
2 answers:
jenyasd209 [6]3 years ago
7 0

20% of Evergreen Valley college students attended the opening night midnight showing of the latest harry potter movie.

Alex17521 [72]3 years ago
4 0

Answer: It is believed that exactly 20% of Evergreen Valley college students attended the opening night midnight showing of the latest harry potter movie.

Step-by-step explanation:

Since we have given that

n = 84

x = 11

So, \hat{p}=\dfrac{x}{n}=\dfrac{11}{84}=0.13

p = 0.20

So, hypothesis:

H_0:p=\hat{p}\\\\H_a:\hat{p}

so, test statistic value would be

z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}\\\\z=\dfrac{0.13-0.20}{\sqrt{\dfrac{0.2\times 0.8}{84}}}\\\\z=-1.604

At 1% level of significance, critical value would be

z= 2.58

Since 2.58>-1.604

So, We will accept the null hypothesis.

Hence, It is believed that exactly 20% of Evergreen Valley college students attended the opening night midnight showing of the latest harry potter movie.

You might be interested in
How do you write 16x-3y=3 in slope intercept form
serg [7]
Y=16/3 x -1

First, you minus both sides by 16x. This will get you -3y = 3 - 16x

Then, you divide both sides by -3. Hence on the right hand side you will get 3 - 16x over -3, which can be split into (-16x/-3) + (3/-3). By simplifying this you can get 16/3 x - 1.
6 0
3 years ago
Read 2 more answers
How far does a horse travel if it gallops at an average speed of 25 km/h for 30 min?
marishachu [46]

Answer:

12.5 km.

Step-by-step explanation:

Distance = average speed x time = 25 km/h x 0.5 h = 12.5 km.

if wrong, sorry

(but most likely right)

4 0
2 years ago
Find X.<br><br> A) 3<br><br> B) 4<br><br> C) 5<br><br> D)6
lbvjy [14]
I think it's 3 or 4.
6 0
3 years ago
Read 2 more answers
Which of the following situations provides the strongest evidence that a coin is NOT fair?
Kamila [148]

Answer:

D

Step-by-step explanation:

A coin has two sides. A side tagged the head and the order side tagged the tail.

By mathematical and probabilistic standards, a fair coin is a coin which has equal value of probabilities for head turning up as well as tail turning up.

what we are saying here is that for a fair coin, P(H) = P(T) = 0.5 or 1/2

Any option or value short of this will make the coin unfair. Whenever we are having the probability of the head greater than the probability of the tail or vice versa, then the coin in question has become unfair.

Now back to the options, by observation, expressing each of the options to the smallest numbers will yield 7/10.

Let’s have a decimal value of each go drive home the point;

7/10 = 0.7

70/100 = 0.7

700/1000 = 0.7

Thus the probability of the head which is meant to be 0.5 is now given as 0.7 which shows that the coin is unfair in all three options since in the real sense they are all same numbers written in different form which of course is not the 0.5 value we should have for a fair coin for probability of getting a head

8 0
2 years ago
Can someone pls help me with this.. Thanks in advance
vfiekz [6]
3,6,8,5, these are your answers
5 0
3 years ago
Read 2 more answers
Other questions:
  • 20.25−912 +11<br> Simplify
    11·1 answer
  • Find the lateral surface area of the cylinder. Round your answer to the nearest tenth
    6·1 answer
  • What would those be in point slope form?
    12·1 answer
  • How many hundreds are there in 5000
    10·2 answers
  • A wheel is shaped like a circle with a diameter of 35 cm. To the nearest centimeter, what is the circumference of the wheel?
    8·2 answers
  • Graph 3x-2y=16 and x-2y=4
    14·1 answer
  • Can anyone help me with this please
    11·1 answer
  • if the national economy shrank at an annual rate of 6% per year for 3 consecutive years, then the economy shrank by 18% over the
    10·2 answers
  • 3/5 divided by 1/6?
    13·2 answers
  • Which PERCENT is represented by the shaded area? (This is urgent!!)
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!