Answer: B) 4.963±0.019.
Step-by-step explanation:
Confidence interval for population mean ( when population standard deviation is not given) is given by :-
, where
= Sample mean
n= Sample size
s= sample standard deviation
t* = critical t-value.
As per given:
n= 50
Degree of freedom = n-1 =49

s= 0.067 lb
For df = 49 and significance level of 0.05 , the critical two-tailed t-value ( from t-distribution table) is 2.010.
Now , substitute all values in the formula , we get

Hence, a 95% confidence interval for the mean weight (in pounds) of the mulch produced by this company is
.
Thus , the correct answer is B) 4.963±0.019.
Answer:
A
Step-by-step explanation:
Find the mean:
Day 1: 2
Day 2: 1
Day 3: 4
Day 4: 5
Day 5: 0
Day 6: 7
Mean =
This does not exceed a daily mean of 3.5 hours which was set by her mom as a guideline.
Therefore we can conclude that:
"Chawrdi complied with the guideline because the mean number of hours played is
.
The expression (cosx)/(1 - sinx) is similar to the answer D. cos(x)/(1 - sin(x)).
Answer:
1 5/6 miles
Step-by-step explanation:
3 1/2 - 1 2/3 convert to improper fractions.
7/2 - 5/3 = 21/6 - 10/6 (common denominator)
21/6 - 10/6 = 11/6
11/6 as a proper fraction is 1 5/6