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
sattari [20]
2 years ago
5

The average age at which adolescent girls reach their adult height is 16 years. Suppose you have a sample of 29 adolescent girls

who are developmentally delayed, and who have an average age at which they reached their adult height of 17.8 years and a sample variance of 77.4 years. You want to test the hypothesis that adolescent girls who are developmentally delayed have a different age at which they reached their adult height than all adolescent girls. In order to calculate the t statistic, you first need to calculate the estimated standard error. The estimated standard error is what?

Mathematics
1 answer:
kumpel [21]2 years ago
7 0

Answer:

standard error = 1.63

Step-by-step explanation:

To calculate the standard error we need to know the standard deviation (σ) and the sample size (n) (see the attached formula).

To obtain the standard deviation we use the given sample variance of 77.4 years:

σ²= variance

Therefore:

σ = √77.4 = 8.8

Now we can calcuate the estimated standard error:

standard error = σ /√n = 8.8/√29 = 1.63

The standard error gives us an estimation about how far the mean of the sample is from the mean of the entire population, and in this case is 1.63.

You might be interested in
Find three prime numbers that add up to another prime number.
Illusion [34]
5+7+11=23
3+11+53=67
3+11+61=71
 are some examples
3 0
3 years ago
Read 2 more answers
Find f(-3) if f(x) =x^2
Gnom [1K]
The answer is 9.
Hope I helped
8 0
3 years ago
Read 2 more answers
a box contains 4 yellow, 5 green and 3 blue balls. find the probability of obtaining a yellow ball in a single random draw.
Alex

Notice that the box has a total os 4 + 5 + 3 = 12 balls, since there are 4 that are yellow, then, the probability to randomly obtaining a yellow ball in a single draw is:

P(Yellow)=\frac{\text{ number of yellow balls}}{\text{total number of balls}}=\frac{4}{12}=0.33

therefore, the probability is 0.33 = 33%

7 0
1 year ago
Help pls, thank you !!
nikdorinn [45]

Answer:

the first one is a lie

Step-by-step explanation:

caf is more 45 degrees than 25

7 0
2 years ago
Is substitutions the best method to use when one variable is already known
8_murik_8 [283]
There’s two ways to substitute, but i think you mean if you know x but don’t know y. if that is true, then yes use substitution
8 0
2 years ago
Read 2 more answers
Other questions:
  • What is the value of x in degrees?
    15·1 answer
  • Can i get help? I understand but a little confused
    15·1 answer
  • If you put 200 into a CD that pays 9 percent interest compounded quarterly how long will it take for this money to compound acco
    5·1 answer
  • Two mechanics worked on a car. The first mechanic worked for
    15·1 answer
  • Divide 3765 by 8 and write the remainder as a fraction
    5·2 answers
  • Brenda is selling cakes for a fundraiser. Customer can buy pecan cakes for $7.75 and chocolate cake for $9.50. Brenda sold 39 ca
    11·1 answer
  • Which statement regarding the diagram is true?
    9·2 answers
  • Find the midpoint of the line segment joining the points (10,14) and (-7,7).
    8·1 answer
  • Find the domain and range, and is it a function?
    9·1 answer
  • Pls help answer<br> i dont not need explaination <br> :)
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!