0:00
Hello everyone.
00:01
So in this question we have given, fishing line undergoes random testing to see if fishing line holds up to the advertised specification.
00:08
Now the mean test line is 30 pounds and the number of fish line selected for sampling is 20.
00:15
Now all samples of fish line broke with an average force of 29 .1 pounds and standard deviation 2.
00:21
And it is also given that significance level is 0 .05.
00:25
So we need to find whether there is a sufficient sample evidence to conclude the fishing.
00:30
Line breaks with an average force of less than 30 pounds.
00:34
So now first of all we will write our hypothesis.
00:37
So we have two types of hypothesis, null hypothesis and alternative hypothesis.
00:42
So null hypothesis is average force mu is equal to 30 and alternative hypothesis is average force is less than 30.
00:53
And since we have less than symbol in our alternative hypothesis, so this is a left tailed, left tailed test.
01:03
And from the above information, sample size n is equal to 20...