A random sample of 25 items is drawn from a population whose standard deviation is known to be σ = 40. The sample mean is x− = 270. (a) Construct an interval estimate for μ with 95 percent confidence. (Round your answers to 2 decimal places.) The 95% confidence interval is from to (b) Construct an interval estimate for μ with 95 percent confidence assuming that n = 50. (Round your answers to 2 decimal places.) The 95% confidence interval is from to (c) Construct an interval estimate for μ with 95 percent confidence assuming that n = 100. (Round your answers to 2 decimal places.) The 95% confidence interval is from to (d) Describe how the confidence interval changes as n increases. Width increases as n increases. Width decreases as n increases.

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.

b and c

step-by-step explanation:

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.

play black ops 4 answer a

step-by-step explanation: