Ahypothesis will be used to test that a population mean equals 8 against the alternative that the population mean does not equal 8 with known variance σ. what are the critical values for the test statistic for the significance level of 0.10? round your answer to two decimal places.

The required critical values is ±1.65  

Step-by-step explanation:

Consider the provided information.

We have given that the significance level is 0.10

Therefore, α=0.10

This is a two tailed test.

The Z critical value is:

Now by using the table we can find the required value.

Hence, the required critical values is ±1.65

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.

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!