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
aleksklad [387]
2 years ago
10

The average age at which adolescent girls reach their adult height is 16 years. Suppose you have a sample of 27 adolescent girls

who are developmentally delayed, and who have an average age at which they reached their adult height of 17.1 years and a sample variance of 36.0 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.
Calculate the t statistic. To do this, you first need to calculate the estimated standard error. The estimated standard error is SM=_________ .The t statistic is _________. Now suppose you have a larger sample size n 81. Calculate the estimated standard error and the t statistic for this sample with the same sample average and the same standard deviation as above, but with the larger sample size. The new estimated standard error is __________ .The new t statistic is___________
Mathematics
1 answer:
abruzzese [7]2 years ago
3 0

Answer:

a) t-statistic  t = 0.9532

b) The standard error  S.E = 1.2

c) The new  t-statistic = 1.95

d)  The new estimated standard error =0.666

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given that the mean of the Population = 16

The sample size n=27

The mean of the sample = 17.1

Given that the variance of the sample (S²) = 36.0

The standard deviation of the sample (S) = √36 = 6

Test statistic

  t = \frac{x^{-} -mean}{\frac{S.D}{\sqrt{n} } }

 t = \frac{17.1 -16}{\frac{6}{\sqrt{27} } }

t = 0.9532

b)

   The standard error is defined by

  S.E = \frac{S.D}{\sqrt{n} } = \frac{6}{\sqrt{27} } =1.154

<u><em>Step(ii):-  </em></u>

c) given that the sample size n = 81

Test statistic

 t = \frac{x^{-} -mean}{\frac{S.D}{\sqrt{n} } }

 t = \frac{17.1 -16}{\frac{6}{\sqrt{81} } }

t = 1.65

d)

The new standard error is defined by

  S.E = \frac{S.D}{\sqrt{n} } = \frac{6}{\sqrt{81} } = 0.66

You might be interested in
Solve for x I need help again :/
Nostrana [21]

The Angles depicted 38° and (6x + 2)° are equal because they form vertical opposite Angle pair.

so,

  • 6x + 2 = 38

  • 6x = 38 - 2

  • 6x = 36

  • x = 36 ÷ 6

  • x = 6
7 0
2 years ago
Determine any data values that are missing from the table, assuming that the data represent a linear function.
Rufina [12.5K]

Answer:

B

Step-by-step explanation:

The x value is increasing by 3 so the next number in the sequence would be 0.

The y value is decreasing by 1 so the missing value would be 1.

3 0
2 years ago
Simplify: x^5. X-^5?
WARRIOR [948]

Answer:

i believe the answer you are looking for is 1?

Step-by-step explanation:

7 0
3 years ago
the sum of 2 numbers is 49. Twice the smaller number is 97 less than 3 times the larger number. What are the numbers?
ivanzaharov [21]

Answer:

let the larger and  smaller number be x and y respectively

first condition

x + y = 49

second condition

3x = 2y+97

3x-2y =97

Multiplying first condition by two and adding both equations

2x + 2y = 98

<u>3x -2y = 97</u>

5x =  195

x = 195/5 = 39

putting the value of x in

x + y = 49

y = 49 -39 = 10

again

Step-by-step explanation:

3 0
2 years ago
What I'd the answer to this? please help me guys!
sp2606 [1]
Knowing the fractions increase, the arrow should be pointing to 5/8.


Hope it helped,

Happy homework/ study/ exam!
5 0
2 years ago
Read 2 more answers
Other questions:
  • Michael drinks 355 milliliters of orange juice and puts 6 centiliters of syrup on his pancakes for breakfast. How many millilite
    15·1 answer
  • How many 1/4litre packets of milk can be filled from a container holding 5 litres ?
    11·1 answer
  • Use the product of powers property to simplify the numeric expression.
    13·1 answer
  • PLEASE HELP ME YALL I NEED YOUR HELP LIKE A LOT. PLEASEEEE I DONT UNDERSTAND NOTHING I AM VERY DUMB ​
    7·1 answer
  • F(x)=4- 3/2x g(x)=1/2x+3/2
    5·1 answer
  • Lashonda wants to buy a new boat but needs money for the down payment. Her parents agree to lend her money at an annual rate of
    7·1 answer
  • What is the denominator between 1/3 and 2/7
    8·1 answer
  • Help me with this question please!!!
    11·1 answer
  • You deposit $5000 into an account that earns 6% annual interest. Fine the balance after 12 years when the interest is compounded
    10·1 answer
  • Name two pairs of opposite rays.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!