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 number less than 4 was rolled 18 times.
The number cube was rolled 50 times. The relative frequency of rolling a number less than 4 is 36%.
Answer:
The scale factor of the smaller rectangle to the larger rectangle is 3/2
Step-by-step explanation:
we know that
If two figures are similar, then the ratio of its corresponding sides is proportional and this ratio is called the scale factor
In this problem
To find out the scale factor of the smaller rectangle to the larger rectangle. set up a proportion
----> ratio of corresponding heights
or
----> ratio of corresponding bases
therefore
The scale factor of the smaller rectangle to the larger rectangle is 3/2
There are 24 pages in each book. I wrote the equation 48x=1152 and solved for x in order to find the number of pages per book, which is what x equals
Answer:
It will take 7.8 hours to print designs on 1300 shirts
Step-by-step explanation:
We will use the ratio method to solve this question
∵ A machine prints designs on T-shirts
∵ It prints 500 shirts in 3 hours
∵ x is the number of hours to print 1300 shirts
→ By using the ratio method
→ shirts : hours
→ 500 : 3
→ 1300 : x
→ By using cross multiplication
∵ 500 × x = 1300 × 3
∴ 500x = 3900
→ Divide both sides by 500
∴ x = 7.8
∴ It will take 7.8 hours to print designs on 1300 shirts
