Answer:
(a) Test statistic is -2.85 and p-value is 0.0022
(b) Reject the null hypothesis. The population mean of dissolved oxygen content is not equal to 10 mg/L
Step-by-step explanation:
H0: mu equals 10
Ha: mu not equals 10
The test is a two-tailed test because the alternate hypothesis is expressed using not equal to
(a) Test statistic (z) = (sample mean - population mean) ÷ (sd/√n) = (9.14 - 10) ÷ (2/√44) = -0.86 ÷ 0.302 = -2.85
Cumulative area of the test statistic = 0.9978
p-value = 2(1 - 0.9978) = 2(0.0022) = 0.0044
(b) The critical value using 0.02 significance level is 2.422. For a two-tailed test, the region of no rejection of the test statistic lies between -2.422 and 2.422.
Conclusion:
Reject the null hypothesis because the test statistic -2.85 falls outside the region bounded by the critical values -2.422 and 2.422.
The population mean of dissolved oxygen content is not equal to 10 mg/L
Step-by-step explanation:
An arithmetic sequence is a sequence that adds or subtracts the same amount every time, making the answer C. The numbers are increasing by +5 consistently.
It is given in the question that
A projectile is fired at 657 mi/hr. how fast is that in meters per second? use the conversion factor 1 mile = 1610 m.
So we need to convert miles per hour to meters per second.
And it is given that 1 mile equals to 1610 meters and 1 hour equal to 3600 seconds.
So we will get
Answer: Either 28in or 26in
A table cloth 40 inches squared could be 1 by 40, 2 by 20, 4 by 10, 5 by 8
1 by 40 would have a perimeter of 1(2) + 40(2) = 82in
2 by 20 would have a perimeter of 2(2) + 20(2) = 44in
4 by 10 would have a perimeter of 4(2) + 10(2) = 28in
5 by 8 would have a perimeter of 5(2) + 8(2) = 26in
1 by 40, and 2 by 20 are highly unlikely table cloths so it is either 26in or 28in
Answer:
If both spouses are under the age of 65 then it'll take 1200 weeks
Step-by-step explanation:
