Answer:
Step-by-step explanation:
Given that a survey was conducted that asked 1004 people how many books they had read in the past year.
Results are:
x bar =12.5
s = 16.6
n = 1004
Std error of sample = 
Since population std dev is not known t critical value can be used for confidence interval.
df = 1004-1 =1003
t critical = 1.96
Margin of error 
Confidence interval lower bound 
Upper bound
Answer: z=83/c - 7 + t
Step-by-step explanation:
Gradient:3
Y intercept:(0,2)
147.3 as a mixed nunber is 147 and 3/10, 147.3 as an improper fraction is 1473/10
9:{1,3 3,9}
18:{1,2,3 6,9,18}