16 ÷ ( 2/5 + 2/ 3 ).
2 answers:
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Answer:
The values of x and y is given by the equation .
Step-by-step explanation:
Given : Five whole numbers are written in order 4 6 x y 10 , the mean and median of the five numbers are the same.
To find : The values of x and y ?
Solution :
Observations 4, 6, x, y, 10.
Mean is summation of observation divided by number of observation.
i.e.
Median is middle term of observations.
Median of odd terms term
term
The mean and median of the five numbers are the same.
i.e.
The values of x and y is given by the equation .
Answer: (17.42, 20.78)
Step-by-step explanation:
As per given , we have
Sample size : n= 9
years
Population standard deviation is not given , so it follows t-distribution.
Sample standard deviation : s= 1.5 years
Confidence level : 99% or 0.99
Significance level :
Degree of freedom : df= 8 (∵df =n-1)
Critical value :
The 99% confidence interval for the population mean would be :-
Hence, the 99% confidence interval for the population mean is (17.42, 20.78) .