00:01
The answer for the question is given data is stayed three years in the ny employees equal to 32.
00:16
Hence sample size n1 equal to 32 and starting salaries of the employees of 32 employees.
00:24
It is given on an average of 39.
00:30
It is 370381 .25 and standard deviation sigma 1 equal to 1805 .98 .98.
00:47
From this standard error equal to sigma 1 by root n1 which is equal to 1805 divided by root 32 which is equal to 319 .256.
01:01
Next one is we are considering the 95 % confidence interval for a two -tailed test.
01:10
So z critical value is equal to plus or minus 1 .96 at 5 % level of significance.
01:16
Hence upper limit is equal to x bar plus zc multiplied by standard error, which is 37 ,381 .25 plus 1 .96 multiplied by standard error, which is 37 ,381 .25 plus 1 .96 multiplied by, 319 .256 which is equal to 38 ,006 .998.
01:40
And lower limit is equal to x bar minus zc into standard error, which is 37 ,381 .25 minus 1 .96 into 319 .256, which is equal to 36 ,755 .5 .5.
02:04
The upper limit and the lower limit are given.
02:07
Next, we have to find the data about who live before three years with dny.
02:15
So here the mean x2 bar is given as 38 ,55 .88 and standard deviation sigma 2 is 1 .887 .188...