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skyeeeeweeesnddj
03.11.2020 •
Mathematics
What are the equations to these graphs?
(30PTS)
Solved
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Ответ:
1) y = -2/3x - 4
2) y = 4
3) y = x + 5
Step-by-step Explanation
Linear equations are represented by y= mx+b
m is your slope (the rise over the run)
b is the y-intercept (where the graph crosses the y-axis)
Ответ:
The necessary sample size is of 5683.
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:
90% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
Past surveys reveal the 30% of tourists going to Las Vegas to gamble spend more than $1,000.
This means that![\pi = 0.3](/tpl/images/1250/5737/b15e8.png)
The estimate is to be within 1% of the population proportion. What is the necessary sample size?
A sample size of n is necessary. n is found when
. So
Rounding up:
The necessary sample size is of 5683.