Answer:
199,500
Step-by-step explanation:
First you set up proportion equation. Since 210,000 is the whole it goes on the bottom of the the equation and x goes on top because that is what we are trying to find. Now for the percent it will go on top and 100 will go the bottom (this goes for any proportion equation the percent will always be on top of 100). Next you cross cross multiply that means you times 210,000 by 5 to get 1,050,000 and then 100 by X which you can't do so you divide 1,050,000 by 100 to get 10,500 but we are not done here we now need to subtract it by 210,000 to get 199,500.
Solution :
Given :
Sample mean,
Sample size, n = 129
Sample standard deviation, s = 8.2
a. Since the population standard deviation is unknown, therefore, we use the t-distribution.
b. Now for 95% confidence level,
α = 0.05, α/2 = 0.025
From the t tables, T.INV.2T(α, degree of freedom), we find the t value as
t =T.INV.2T(0.05, 128) = 2.34
Taking the positive value of t, we get
Confidence interval is ,
(32.52, 35.8)
95% confidence interval is (32.52, 35.8)
So with confidence of the population of the mean number of the pounds per person per week is between 32.52 pounds and 35.8 pounds.
c. About of confidence intervals which contains the true population of mean number of the pounds of the trash that is generated per person per week and about
that doe not contain the true population of mean number of the pounds of trashes generated by per person per week.