The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is now less than to 7,500 hours. e population standard deviation is 1,200 hours. A random sample of 64 CFLs indicates a sample mean life of 7,250 hours. Required:
a. At the 0.05 level of​ significance, is there evidence that the mean life is different from 7,463 hours question mark.
b. Compute the​ p-value and interpret its meaning.
c. Construct a 95​% confidence interval estimate of the population mean life of the light bulbs.
d. Compare the results of​ (a) and​ (c). What conclusions do you​ reach?

walter needs to make at least 5 more cookies but no more than 40. 5 ≥ x ≥ 40;

step-by-step explanation:

walter has to make a minimum of 20 cookies. he already has 15 cookies made, so he must make 5 more to meet the minimum.

the maximum amount of cookies he can make is 55. he already has 15, so he has to make no more than 40 more cookies to meet the maximum.

the answer is 150.6

step-by-step explanation:

you multiply .02 by 30 and get .6.

and then you multiply 5.00 by 30 and get 150.

hope this !

ranks (& how to earn them):

-beginner (needs at least 0 points & 0 brainliest answers)

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how to award brainliest:

you must wait until 2 people answer to award brainliest. i'm pretty sure that it should be next to the "" and "comments" buttons.  

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