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
baherus [9]
3 years ago
11

Various studies indicate that approximately 11% of the world's population is left handed. You think this number is actually high

er. You take an SRS of 225 people and find that 31 of them are left handed. Test your claim at the 5% significance level.
A. State your null and alternative hypotheses.
B. Sketch the rejection region.
C. Calculate the test statistic.
D. Determine the P-value for your test.

Mathematics
1 answer:
Irina-Kira [14]3 years ago
8 0

Answer:

a. H0 : p ≤ 0.11 Ha : p >0.11 ( one tailed test )

d. z= 1.3322

Step-by-step explanation:

We formulate our hypothesis as

a. H0 : p ≤ 0.11 Ha : p >0.11 ( one tailed test )

According to the given conditions

p`= 31/225= 0.1378

np`= 225 > 5

n q` = n (1-p`) = 225 ( 1- 31/225)= 193.995> 5

p = 0.4 x= 31 and n 225

c. Using the test statistic

z=  p`- p / √pq/n

d. Putting the values

z= 0.1378- 0.11/ √0.11*0.89/225

z= 0.1378- 0.11/ √0.0979/225

z= 0.1378- 0.11/ 0.02085

z= 1.3322

at 5% significance level the z- value is ± 1.645 for one tailed test

The calculated value falls in the critical region so we reject our null hypothesis H0 : p ≤ 0.11 and accept  Ha : p >0.11 and  conclude that the data indicates that the 11% of the world's population is left-handed.

The rejection region is attached.

The P- value is calculated by finding the corresponding value of the probability of z from the z - table and subtracting it from 1.

which appears to be 0.95 and subtracting from 1 gives 0.04998

You might be interested in
Pick a user for me (im so indecicive) most helpful answer gets brainlist ofc also lots of points, yw!
LUCKY_DIMON [66]

Answer:

I just answered the other question you asked. Why did you ask the same question twice? Also, I said the 1st one

Step-by-step explanation:

7 0
2 years ago
If x + 2 is a factor of x^2 +mx + 14 find m
jolli1 [7]
X² + mx + 14            

If (x+2) one of the factors, we can write

14 = 2*7
m = 2+7= 9

x² +9x + 14 = (x+2)(x+7)



3 0
3 years ago
3 × 1 1/2 as a mixed number in simplest form
Anna11 [10]

Answer:

1.5 - 1 1/5 = 3

10

= 0.3

Step-by-step explanation:


3 0
3 years ago
Read 2 more answers
Whats the formula to Reed's fence is 96 feet long how many yards long is Reed's fence
Dmitry [639]
If there are 3 feet per yard, then all you have to do is take the 96 feet and divide by 3, this gives you 32 yards. 

If you have any questions please let me know, other wise take care. (:
8 0
3 years ago
Compute the measures of center for both the boys and girls data. Describe their differences. Use the terms mean and median to ju
polet [3.4K]

Answer:boys: median=50, mean=46

Girls: median= 33, mean=34

Step-by-step explanation:

Mean is the average. Median is the middle number. Both groups had 10 scores. Boys ranged from 15-81. Girls from 0-75; their mean & median would be less because their scores are less.

6 0
3 years ago
Other questions:
  • Which is the expanded form of 124,750,000?
    13·2 answers
  • Determine the most probable next term in the sequence 486,162,54,18,6
    5·2 answers
  • Helps? PLEASE I NEED ANSWER
    11·2 answers
  • What is 16-2t = 5t+ 9
    6·2 answers
  • What could be used to evaluate the expression -6(4(2/3)
    8·1 answer
  • The weight distribution of parcels sent in a certain manner is normal with meanvalue 12 pounds and standard deviation 3.5 pounds
    12·1 answer
  • A garden measuring 10 meters by 7 meters is going to have a walkway constructed all around the perimeter, increasing the total a
    12·1 answer
  • 3.What do we do when we have an answer that is a double-digi
    6·1 answer
  • Solve for x(need help)
    8·1 answer
  • Pythagorean theorem !
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!