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
nasty-shy [4]
2 years ago
7

A random sample of 145 students is chosen from a population of 4,250 students. The mean IQ in the sample is 130, with a standard

deviation of 7. Using a margin of error of 0.95%, what is the 90% confidence interval for the students' mean IQ score?
Mathematics
1 answer:
snow_tiger [21]2 years ago
7 0

Answer:

Approximately, the 90% confidence interval for the students' mean IQ score is between 129.045 - 130.956

Step-by-step explanation:

The formula to use to solve this question is called the Confidence Interval formula.

Confidence interval =

x ± z × ( σ/ (√n) )

Where:

x = the sample mean = 130

z = the z-value for 90% confidence = 1.645

σ = standard deviation = 7

n = sample size = 145

130 ± 1.645 × (7/√145)

130 ± 0.9562687005

130 - 0.9562687005 = 129.0437313

130 + 0.9562687005 = 130.9562687005

Therefore, approximately, the 90% confidence interval for the students' mean IQ score is between 129.045 - 130.956

You might be interested in
Solve for X please help
laila [671]

Answer:

x=−5.675726

Step-by-step explanation:

8 0
2 years ago
I need help with this question please ASAP before tomorrow!<br><br> Thank you :)
luda_lava [24]
23- right handed females
7 0
3 years ago
Read 2 more answers
I need help FAST!!! 10pts
Katena32 [7]
The answer is 0.7 kilometers
5 0
3 years ago
Read 2 more answers
Slope of (-11,5) (-8,4)
nika2105 [10]
Slope is equal to the change in y over change in x, or rose over run m= 1/3
6 0
3 years ago
Hi guys I need help<br><br><br><br><br><br>please<br><br><br><br><br><br><br>​
Zanzabum

Answer:

saannn Wala Naman

Step-by-step explanation:

HAHAHAJAH BLABLA

THANKS SA POINTS

7 0
3 years ago
Read 2 more answers
Other questions:
  • How many numbers between 24 and 719 are divisible by 4 and 8?
    12·1 answer
  • Select the favorable outcomes for rolling exactly one three.
    12·1 answer
  • Equation of slope 4, through (7,2)
    9·1 answer
  • Is two ratios are formed at random from the four numbers 1,2,4, and 8 what is the probability that the rations are equal? Show w
    14·2 answers
  • Evaluate 6h + 20 - 3 if h = 3
    7·2 answers
  • Will give Brainliest! if right!
    6·1 answer
  • I need help because this is hard
    10·1 answer
  • 1. Mrs. Gonzalez signed up to bring two dozen cupcakes for the school bake sale. She made one dozen, but her children ate three
    9·1 answer
  • In the diagram below, DE is parallel to XY. What is the value of y
    13·1 answer
  • I need helpppp (10 points )
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!