Answer:
75/100
=15/20
3/4
The probability is3/4
Step-by-step explanation:
Answer:
90 inches
Step-by-step explanation:
900 divided by 10 = 90
Answer:
A sample of 499 is needed.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, we have the following confidence interval of proportions.

In which
z is the zscore that has a pvalue of
.
The margin of error is given by:

In this question, we have that:

90% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
How large a sample would be required in order to estimate the fraction of tenth graders reading at or below the eighth grade level at the 90% confidence level with an error of at most 0.03
We need a sample of n, which is found when
. So






Rounding up
A sample of 499 is needed.
Answer:
Step-by-step explanation:
3/2 is the slope in y=mx+b format
b= y-intercept witch would be -4 sense it is subtracting not adding
m=slope witch is 3/2
x=x-axis
Answer:
Percent of strike outs per-bat = 32%
Step-by-step explanation:
Given:
Number of balls strike out = 112
Total number of ball played = 350
Find:
Percent of strike outs per-bat
Computation:
Percent of strike outs per-bat = [112/350]100
Percent of strike outs per-bat = [0.32]100
Percent of strike outs per-bat = 32%