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
svetlana [45]
3 years ago
9

Some IQ tests are standardized based on the assumption that the population mean is 100 and the standard deviation is 15. Test gr

aders decide to reject this hypothesis if a random sample of 25 people has a mean IQ greater than 110. Assuming that IQ scores are normally distributed, what's the power of the test if the true population mean is 105?
Mathematics
1 answer:
aleksandr82 [10.1K]3 years ago
3 0

Answer:

0.952

Step-by-step explanation:

we know that

here standard error =std deviation÷(n)^1/2  

=15/(25)^1/2 =15/5=3

Assuming that IQ scores are normally distributed

Now, probability of a Type II error

=P(X<110) = P(Z<(110-105)/3)=P(Z<1.67)

=0.952

 the power of the test if the true population mean is 105 = 0.952

You might be interested in
I need to know this answer I've worked it out but not sure
a_sh-v [17]
See attached picture

7 0
3 years ago
There's a plane that flies at an altitude of 25,000 feet. There's a submarine that dives to a depth of 600 feet below sea level.
ella [17]
25,000 + 600 considering they would meet at 0, so they are 25,600 feet apart
8 0
3 years ago
At the Barclays Center there are 850 seats. Tickets were sold for 816 of the seats. For what percentage of the seats were ticket
snow_tiger [21]
Percent sold=sold/original times 100
sold=816
original=850

percent sold=816/850 times 100
percent sold=0.96 times 100
percent sold=96%
4 0
3 years ago
Read 2 more answers
Click on the value for m that makes this inequality true
Stolb23 [73]

Answer:

To solve this inequality you need to get m by itself

3m+10<30 (First subtract 10 from each side)

3m<20 (10-10=0, 30-10=20) (Then divide each side by 3)

m< 20/3 or 6.666666

So your answer is any that is less than 6.66666

Your answer would be 5

5

Hope this helps ;)

8 0
3 years ago
Read 2 more answers
Each section of a race is 25 mile. the race has 4 sections.
In-s [12.5K]
The answer is to that is 100
25times 4
5 0
3 years ago
Other questions:
  • Transform y = cot(x) to get the graph of. Which type of transformation is not performed?
    12·2 answers
  • It takes 7 moles 7 minutes to dig 7 holes. How long will it take for 8 moles to dig 8 holes.
    13·1 answer
  • HELP URGENT! WILL GIVE BRAINLIEST!!
    13·2 answers
  • What is the standard form of (1+2√-3/1+2√-3 ?
    11·1 answer
  • Evaluate the expression for the given value of the variable 8+x=6
    9·1 answer
  • What is the slope of the line graphed below? (-1,3) (-2,-1)
    7·2 answers
  • How do u write graphs in standard form?
    11·1 answer
  • A medical researcher claims that 10 % of children suffer from a certain disorder. Identify the type I error for the test.
    8·1 answer
  • Help me please due before 10pm tonight
    15·2 answers
  • Melinda has a goal of donating at least $300 to charity this year. Her mother and father each gave her $25 to help and she is se
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!