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
gayaneshka [121]
3 years ago
7

g A random sample of 100 students was taken. Eighty-five of the student in the sample experienced anxiety during the exam. We ar

e interested in determining whether or not the proportion of the student who experience anxiety during the exam is significantly more than 80%. The test statistic is
Mathematics
1 answer:
BaLLatris [955]3 years ago
4 0

Answer:

The test statistic is z = 1.25

Step-by-step explanation:

We are interested in determining whether or not the proportion of the student who experience anxiety during the exam is significantly more than 80%.

At the null hypothesis, we test if the proportion is 80%, that is:

H_0: p = 0.8

At the alternate hypothesis, we test if the proportion is more than 80%, that is:

H_a: p > 0.8

The test statistic is:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample.

80% is tested at the null hypothesis:

This means that \mu = 0.8, \sigma = \sqrt{0.2*0.8} = 0.4

A random sample of 100 students was taken. Eighty-five of the student in the sample experienced anxiety during the exam.

This means that n = 100, X = \frac{85}{100} = 0.85

The test statistic is

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

z = \frac{0.85 - 0.8}{\frac{0.4}{\sqrt{10}}}

z = 1.25

The test statistic is z = 1.25

You might be interested in
The handle of a hammer is 33 cm long. What is the length in inches?
Gnesinka [82]

Answer:

12.992 inches

Step-by-step explanation:

hopes it helps

7 0
2 years ago
Read 2 more answers
Help with 2 questions please.
Natasha_Volkova [10]
1 is the 3rd option down
2 is the second option down

7 0
3 years ago
PLEASE HELP! OFFERING ALL OF MY POINTS!!! I NEED ALL OF THE ANGLES AND I GET TO GO TO A CHARTER SCHOOL!!! I CANT FIGURE THIS OUT
Diano4ka-milaya [45]

Answer:

k is an acute angle

L is a right angle

J is a acute angle

Step-by-step explanation:

5 0
2 years ago
Two buses departed simultaneously from the terminal. One travelled due south, and the other travelled due east at the rate of 2
Solnce55 [7]

Answer:

5km

Step-by-step explanation:

6 0
2 years ago
What is the vertex of g(x) = 8x2 - 64x
Ainat [17]
Hi, check my ans, tell me if anything is wrong. Ok?

8 0
2 years ago
Other questions:
  • Sam uses 2/3 of a cup of sugar per serving to make 48 cookies. How many cups of sugar does he need to make 288 cookies?
    15·2 answers
  • Which of the following describes how to translate the graph y = lxl to obtain the graph of y = lx - 6l?
    10·2 answers
  • Answer please have 20 questions? will give the brilest.
    6·1 answer
  • Find the area of each.<br><br> 5in and 2.4
    12·1 answer
  • Which of the following is an inequality that represents the following scenario: Peter is at a local pizza shop. He wants to purc
    15·2 answers
  • Bart uses 3/12 cup milk to make muffins write a fraction that is equivalent to 3/12
    6·2 answers
  • Manny is practicing for the swimming competition. the table shows the distance in meters, y, he swims in x number of laps. If Ma
    15·1 answer
  • Can someone help in need the length of the third side
    14·1 answer
  • A 27- inch long ribbon was cut into 4 equal lengths. How long was each piece of ribbon?
    5·1 answer
  • Find 136.7% of 301. Round to the nearest hundredth.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!