SOLUTION: A manufacturer claims that the mean lifetime, , of its light bulbs is months. The standard deviation of these lifetimes is months. One hundred bulbs are selected at random, and

Algebra ->  Probability-and-statistics -> SOLUTION: A manufacturer claims that the mean lifetime, , of its light bulbs is months. The standard deviation of these lifetimes is months. One hundred bulbs are selected at random, and       Log On


   

Question 304950: A manufacturer claims that the mean lifetime, , of its light bulbs is months. The standard deviation of these lifetimes is months. One hundred bulbs are selected at random, and their mean lifetime is found to be months. Can we conclude, at the level of significance, that the mean lifetime of light bulbs made by this manufacturer differs from months?
Perform a two-tailed test. Then fill in the table below.
Carry your intermediate computations to at least three decimal places, and round your responses as specified in the table.
1. The null hypothesis?
2. The alternative hypothesis?
3. The type test statistic
4. The value of the test statistic
5. The p value
6. Can we conclude that mean lifetime of the light bulbs may by this manufacturer differs from 45 months.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Essential numbers are missing from your post.
Cheers,
Stan H.