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
algol [13]
2 years ago
15

A researcher who wants to test the hypothesis that the population mean of a variable is 85, takes a sample of 50 people and obta

ins a sample mean of 81. A hypothesis test finds that the sample mean is not significantly different from the hypothesized population mean at 5% level of significance. What could be a 95% confidence interval for the population mean?
Mathematics
1 answer:
zhenek [66]2 years ago
5 0

Answer:

CI = (  28,28  - 1,96*σ ;  28,28 + 1,96*σ )

Step-by-step explanation:

Population mean      μ₀  = 85

Sample size   n  =  50

Sample mean   μ  = 81

Significance Level     α = 5 %    α  =  0,05

From Hypothesis Test

Null Hypothesis                         H₀         μ    =    μ₀

Alternative Hypothesis             Hₐ         μ    ≠   μ₀  

After a two taio-test was found no significative difference about the mean

Then  α/2  =  0,05/2   α/2 = 0,025

CI = 95 %     CI = 0,95

From z-table

z(c) = (±) 1,96

CI =  (  μ -  μ₀ ) ± z(c) * σ/√50

CI =  (  85 - 81 )*√50  ± 1,96 *σ

CI =  4*7,07   ± 1,96*σ

CI  =  (  4*7,07  - 1,96*σ ;   4*7,07  + 1,96*σ )

CI = (  28,28  - 1,96*σ ;  28,28 + 1,96*σ )

You might be interested in
A jar contains 5 blue marbles, 7 yellow marbles, and 8 green marbles. What is the probability of randomly choosing a blue marble
amm1812

Answer:

I think it is 27%

Step-by-step explanation:

I'm not sure but I hope I'm correct

7 0
3 years ago
The first five terms in a pattern are shown below. -0.5, -0.25, 0 , 0.25, 0.5, . . . Which equation represents the pattern?
Korolek [52]

Answer:

x + 0.25

Step-by-step explanation:

In this equation, x is representing an integer ( - 0.5, - 0.75, 0, 0.25) whilst 0.25 is a constant

5 0
3 years ago
Will sides 4cm,5cm,13cm make a triangle ?
Katena32 [7]

Answer:

No it won't make a triangle

Step-by-step explanation:

Using pythagorean you have

4^2+5^2=13^2

Which is 41=169

To make a triangle these have to be equal so the sides won't make a triangle

5 0
3 years ago
Please help me find the function to y
Fed [463]

Answer:

(-1, -7) (0, -1) (1, 5) (5, 29)

Step-by-step explanation:

okay so the equation is y = 6x - 1

all you have to do is plug in all the x values to get the y

y = 6(-1) - 1

y = - 6 - 1

y = -7

y = 6(0) - 1

y = 0 - 1

y = -1

y = 6(1) - 1

y = 6 - 1

y = 5

y = 6(5) - 1

y = 30 - 1

y = 29

8 0
3 years ago
Plz help will mark as brainliest
Maru [420]

Answer: the second option !!!

3 0
3 years ago
Other questions:
  • Fun world charges a flat rate of $10.00 per day for stroller rental plus $2.00 per hour the stroller is being used. If the numbe
    10·1 answer
  • Simplify
    14·1 answer
  • Which statements are true? <br> Please see picture
    15·2 answers
  • Find the midpoint of the line segment with the given endpoints. <br>(14, -6), (13, 14)<br>​
    9·2 answers
  • if the total income generated from gasoline for AER was $408 million , how much would be the cost of a gallon of gasoline
    14·1 answer
  • You purchase a brand new red car for $23,400. If the car depreciates at a rate of 15% per year, find the decrease in value from
    13·1 answer
  • A salesperson is paid $60 per week plus $4.50 per sale. This week,the salesperson wants to earn at least $250. How many sales, n
    12·1 answer
  • Select the correct answer. What is the value of x in 2 (5x) = 14
    6·2 answers
  • If f(x) = -2x -7 what is f(4) and f(-5)​
    12·1 answer
  • I need help asap please<br> Will give BRAINLIST for correct answers only<br> Thank you
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!