00:01
Hello students here are first bit this mean will be given new will be 380 and standard division will be 50 near first bit probability of x less than 400 converted into z probability of z less than 400 minus 380 divided by 50 we get probability of z less than 0 .4 will be equal to 0 .6554.
00:35
Next, b probability of 300 is less than x is less than 400.
00:43
That can be converted into z.
00:46
Probability of 300 minus 380 divided by 50 is less than z less than 400 minus 380 divided by 50.
00:59
That will be equal to probability of minus 1 .6 is less than z less than 0 .4 will be equal to 0 .606.
01:11
Next, c bit, that is, mu, x bar will be, mu will be equal to 380.
01:18
And sigma x bar will be sigma by root 10 will be 50 by square root of 25, that will be equal to 10.
01:27
Next, d -bit probability of 375 less than x bar less than 385 converted into z probability of 375 minus 380 divided by 10 is less than z less than 385 minus 380 divided by 10.
01:52
We get probability of minus 0 .5 is less than z less than 0 .5...