Using Unit Rates to compare Ratios continued
1 answer:
Answer:
Brandon
Step-by-step explanation:
GIVEN: Branden and Pete each play running back. Branden carries the ball times for
yards, and Pete has
carries for
yards.
TO FIND: Who runs farther per carry.
SOLUTION:
Total yards traveled by Brandon
No. of times ball carried by Brandon
Average yards per carry for Brandon
Total yards traveled by Pete
No. of times ball carried by Pete
Average yards per carry for Pete
≅
As the number of yards per carry is higher for Brandon , therefore he runs farther per carry.
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Answer:
Step-by-step explanation:
Given that a statistician selected a random sample of 125 observations from a population with a known standard deviation equal to 16 and computed a sample mean equal to 77
We can use Z critical values since population std deviation is known. Also sample size >30
We find std error of mean =
Margin of error = Z critical value * 1.4311
Z critical values for 93% = 1.81
for 89% = 1.60
n Std error Z critical Conf interval
89%
125 1.4311 1.6 (74.71024 79.28976 )
93%
1.81 (74.409709 79.590291 )
We find that when confidence level increases interval width increses.
c) When sigma changes to 441, std error changes to
So we get
n Std error Z critical Conf interval
89%
441 0.7619 1.6 (75.781 78.219 )
93%
1.81 (75.621 78.37904)
d) When n = 625, std error changes to 16/25 = 0.64
n Std error Z critical Conf interval
89%
441 0.64 1.6 (75.976 78.024 )
93%
1.81 (75.842 78.1584)
When sample size increases, confidence interval width decreases.
Answer:
Y = 1/4x + 1/2
Step-by-step explanation:
The inverse is found by reflecting the graph across the y=x line. In the equation, this result by switching x and y then solving for y.
Y =4x-2
X=4y-2
X+2=4y
(X+2)/4= y
1/4x +1/2 =y
