00:01
A student, the average number of calories from the fast food meal for the adult in the usa is 840.
00:08
Then given population mean mu equal to 840 calories.
00:13
A neutrinist believes that the average is higher than reported.
00:16
Then to test here, null hypothesis mu is less than or equal to 840 versus alternative hypothesis mu is greater than 840.
00:28
This is our claim.
00:31
They randomly sampled the 49 meals.
00:35
Then n equals to 49 meals that adult order and found the data below.
00:41
This is the all data which they found for the 49 adults.
00:45
Use the level of significance is 1 % that is alpha equals to 0 .01.
00:51
And then test statistics for this test is given by t is equal to x bar minus mu upon s upon under root of n where x bar equals to summation of x upon n and s is equal to under root of summation of x minus x bar bracket square divided by n minus 1.
01:22
First find the value of x bar here.
01:25
X bar equals to summation of x that is 849 plus 847 up to the last observation value plus 919 and the last take a summation we get this value as 41794 which is divided by n.
01:43
N is the total number of observations which is 49...