Isn't it already in standard form?
Answer: %2.1352
(Rounded =%2.1)
Step-by-step explanation:
5.5/5.62=0.978648
1.0 - 0.978648= 0.021352
(Move the decimal over 2 places to the right to convert to percent)
002.1352
%2.1352
(Rounded =%2.1)
Answer:5 inches
Step-by-step explanation:
It lowered 3 and then 2.5 which is 5.5 and then it rose a foot but the next day it dropped 1.5 inches so it dropped a total of 7 inches so the change total is 12-7 which is 5 inches
Answer:
Z-test is a statistical test used to check weather two means are significant or not for unknown variance and large sample size.
Z = (M - μ) ÷ √(σ² / n)
where, M = Sample Mean = 66.075
μ = Population Mean = 90
σ² = Population Variance = 15
Now, Calculating the value of Z-test:
Z = (66.075 - 90) ÷ √(225 ÷ 40)
Z = -23.925 ÷ 2.37171
Z = -39.06936
The value of Z is -39.06936.
The value of p is < .00001 at 90% confidence level.
If the p-value is less than value of α, We accept the null- hypothesis otherwise reject.
The result is significant at p < .10.
Thus, we accept the null hypothesis.