Answer:
Sample size should be atleast 617
Step-by-step explanation:
given that a 95% confidence interval for the mean of a population is to be constructed and must be accurate to within 0.3 unit.
i.e. margin of error <0.3
Std devition sample = 3.8
For 95% assuming sample size large we can use z critical value
Z critical = 1.96
we have
Sample size should be atleast 617 to get an accurate margin of error 0.3
slope= 4
rise=20 run= 5 divide =4
a)5/9 yards=0.556yards
b)10/9 yards=1.11 yards
for the part a
To solve this exercise we must divide the total distance traveled by the grasshopper (5 yards) by the number of jumps that were made (9).
if you use the calculator you will realize that the value is 0.55yards
for the part b
knowing the distance traveled in a jump, we multiply this value by two to find out how much is the distance traveled in 2 jumps
if you use the calculator you will realize that the value is 1.11 yards
Robert paid $4,603.6 in Social Security.
Robert total earnings:
$5,805 at Young's Grocery.
$12,445 at A&B Restaurant.
$56,002 at CCD Communications.
So his total earnings are of:
5805 + 12445 + 56002 = $74,252
How much did Robert pay in Social Security?
6.2%, that is, 0.062 of $74,252. So
0.062*74252 = $4,603.6