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
dmitriy555 [2]
3 years ago
6

a physician wants to estimate with 92% confidence the average height of 6 year old boys in his community he wants his margin of

error to be 0.5 in the population of these heights is normally distributed with a standard deviation of 1.8 inches how many 6 year old boy should he use in his sample​
Mathematics
1 answer:
iris [78.8K]3 years ago
5 0

Answer:

n=40 boys

Step-by-step explanation:

-Margin of error is given by the formula:

E=z\frac{\sigma}{\sqrt{n}}

-The z score for a probability of 92% is 1.75

#We make n the subject of the formula and substitute at a 92% confidence:

E=z\frac{\sigma}{\sqrt{n}}\\\\\sqrt{n}=\frac{z\sigma}{E}\\\\n=[\frac{z\sigma}{E}]^2\\\\\therefore n=[\frac{1.75\times 1.8}{0.5}]^2\\\\=39.69\approx 40

Hence, he needs approximately 40 boys for the study

You might be interested in
. Freddie swam 3/8 laps yesterday and 1/4 today. How many laps did he swim in total? IS
Ronch [10]

Answer:

5/8

Step-by-step explanation:

Freddie swam 3/8 laps yesterday

He also swam 1/4 laps today

Therefore the total lap swam can be calculated as follows

= 3/8 + 1/4

= 5/8

Hence the total lap is 5/8

8 0
3 years ago
Label each tick mark with its location on the number line:
Aleksandr-060686 [28]
From my understanding the question is basically asking u to label each Dash/tick mark on the line. They have already given u 0 as the first one, 24 as the fifth one and 60 as the eleventh one. I’m assuming u can use any method.
Answer: use any method of division or skip counting then you will see that each line increases by 6

First line: 0
Second line: 6
Third line: 12
Fourth line: 18
Fifth line: 24
Sixth line: 30
Seventh line: 36
Eight line: 42
Ninth line: 48
Tenth line: 54
Eleventh line: 60
4 0
3 years ago
Read 2 more answers
In an inequality written in slope-intercept form, which symbol is used to include a solution set that's above the line and inclu
yan [13]

Answer:

C. ≥

Step-by-step explanation:

Values of y on or above the line are "greater than or equal to" those on the line. The inequality will have the form ...

y ≥ (expression for the line)

4 0
3 years ago
Multiplying a trinomial by a trinomial follows the same steps as multiplying a binomial by a trinomial. Determine the degree and
Montano1993 [528]
Hello,
Let P(x) the first  polynomial, degree P(x)=p
Q(x) the second degree Q(x)=

degree (P(x)*Q(x))=p*q

Max terms: p*q+1

(x²+x+2)(x²-2x+3)=x^4+2x^3+3x²-x+6


5 0
3 years ago
Read 2 more answers
Answer below<br> Brainliest
Ksenya-84 [330]

Answer:

25 remainder of 4

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • The city of Atlanta recently increased their sales tax from 7.5% to 8%. How much more tax would you pay on a $10 purchase?
    9·2 answers
  • Help me ples.<br><br> I will mark you brainly as always!<br> and heart and 5 star
    5·2 answers
  • Find the distance between (-3, 10) and (4,-8)<br> Can you please write the steps for me ?
    13·1 answer
  • Will MARK BRAINLIEST!!! Jason invests $8,264 in an account that earns an annual interest rate of 4%. What will be the balance of
    5·1 answer
  • Please help!!!!!!!!!
    13·1 answer
  • What is the slope of the line between (3, 10) and (5,8)?<br> HELP!!!
    13·1 answer
  • What is central and inscribed angle​
    11·1 answer
  • Find the coordinates of P that partitions segment AB , where A (2,3) and B (14,9), so that AP:PB is a 1:2 ratio. Also, find the
    6·1 answer
  • Show that P(x)=x³-6x²+11x-6 is divisible by x-1.​
    8·2 answers
  • Help asap.brainliest and 100 points
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!