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
goblinko [34]
3 years ago
7

The standard IQ test has a mean of 102 and a standard deviation of 13. We want to be 98% certain that that we are within 5 IQ po

ints of the true mean. Determine the required sample size.
Mathematics
1 answer:
aleksklad [387]3 years ago
5 0

Answer:

37

Step-by-step explanation:

Margin of error = critical value × standard error

For 98% confidence, CV = 2.326 (from t table).

Standard error is σ / √n, where σ is the population standard deviation, and n is the sample size.

Plugging in:

5 = 2.326 × 13 / √n

n = 36.6

Rounding up, n = 37.

You might be interested in
-0.5,1.25,-1/3,0.5,-5/3 ordered from least to greatest
vampirchik [111]

Answer:

Step-by-step explanation:

-5/3,-0.5,-1/3,0.5,1.25

8 0
2 years ago
Please help me with this question thank you
Fantom [35]
If the answer is an equation then it is:
x=(4y+15)/(5-3y)
8 0
3 years ago
Read 2 more answers
Mulitiply: -23x(x+3)
Alisiya [41]

Answer:

- 23x(x + 3) \\   { - 23x}^{2}  - 69x \\  \\  \\  \\  \\  \\ hope \: it \: helps \\ stay \: safe \: healthy \: nd \:and \: happy

4 0
2 years ago
Read 2 more answers
Suppose that g(x)=f(x)+3. Which statement best compares the graph of g(x) with the graph of f(x)?
Nonamiya [84]

Answer:

He said points

Step-by-step explanation:

I can get points for nothing

8 0
2 years ago
Given that <img src="https://tex.z-dn.net/?f=I_0%20%3D%2010%5E-12" id="TexFormula1" title="I_0 = 10^-12" alt="I_0 = 10^-12" alig
Alex Ar [27]

The intensity of sound which the decibel level of the sound measures 156 is 3.981 × 10³ W/m²

Decibel level, dB = 10log₁₀(I/I₀) where dB = decibel level = 156, I = intensity at 156 dB and I₀ = 10⁻¹² W/m².

Since we require I, making I subject of the formula, we have

dB/10 = log₁₀(I/I₀)

\frac{I}{I_{0} } = 10^{\frac{dB}{10} } \\I = I_{0} 10^{\frac{dB}{10} }

Substituting the values of the variables into the equation, we have

I = I_{0} 10^{\frac{dB}{10} }\\I = 10^{-12} 10^{\frac{156}{10} }\\I = 10^{-12} 10^{15.6}\\I = 10^{15.6-12} \\I = 10^{3.6} W/m^{2}

I = 3981.072W/m²

I = 3.981 × 10³ W/m²

So, the intensity of sound which the decibel level of the sound measures 156 is 3.981 × 10³ W/m²

Learn more about intensity of sound here:

brainly.com/question/4431819

3 0
3 years ago
Other questions:
  • On Sunday Sheldon bought 3 and 1/2kg of plant food. He used 1 and 2/3kg on his strawberry plants and used 1/4kg for his tomato p
    13·1 answer
  • 4-[(x+3)/ ((x^2 +5x +6)/(x-2))]
    6·1 answer
  • Alcatuieste enunturi cu urmatoarele ortograme:sa/s-a,sau/s-au,intr-o,dintr-o,intr-un,dintr-un
    10·1 answer
  • Anyone willing to answer this question?
    5·1 answer
  • . What is the simplified form of ( square root of 140) ?
    14·1 answer
  • For which values of x is the function y = 5 / (x-4)(x+5) not defined? Select all that apply.
    12·1 answer
  • Which graph is a function on top<br><br> Which graph is not a function on bottom
    11·1 answer
  • I'm gonna fail schoool ​
    14·1 answer
  • Complete the following diamond problems.
    5·1 answer
  • If f(x) = 4x - 8 and g(x) = 5x + 6, find (f+ g)(x).
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!