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mcadoo774
13.10.2020 •
Mathematics
Question: What is the slope of the line?
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Ответ:
4/5
Step-by-step explanation:
If you look at the point (-2,0) you can see that it sits directly on the line above 2. If you also at the point (3,4) you can see that its also sitting directly in the middle, where the line runs through it. Using this information we can use Rise/Run.
Rise/Run = Y/X
from (-2, 0) you rise 4 and you run 5 to the right to land on (3,4).
This is one of many ways you can calculate The slope from a graph!
Hope this helps! :)
Ответ:
a
The 95% confidence interval is
Generally the interval above can interpreted as
There is 95% confidence that the true proportion of Wal-Mart stores that have more than 2 items priced inaccurately per 100 items scanned lie within the interval
b
Generally 99% is outside the interval obtained in a above then the claim of Wal-mart is not believable
c
Step-by-step explanation:
From the question we are told that
The sample size is n = 60
The number of stores that had more than 2 items price incorrectly is k = 52
Generally the sample proportion is mathematically represented as
=>![\^ p = \frac{ 52 }{ 60 }](/tpl/images/1007/6465/0df93.png)
=>![\^ p = 0.867](/tpl/images/1007/6465/4af2e.png)
From the question we are told the confidence level is 95% , hence the level of significance is
=>![\alpha = 0.05](/tpl/images/1007/6465/246a1.png)
Generally from the normal distribution table the critical value of
is
Generally the margin of error is mathematically represented as
=>![E = 1.96 * \sqrt{\frac{ 0.867 (1- 0.867)}{60} }](/tpl/images/1007/6465/02ee5.png)
=>![E = 0.0859](/tpl/images/1007/6465/a84c5.png)
Generally 95% confidence interval is mathematically represented as
=>![0.867 - 0.0859 < p < 0.867 + 0.0859](/tpl/images/1007/6465/9e759.png)
=>![0.7811 < p < 0.9529](/tpl/images/1007/6465/9dd2d.png)
Generally the interval above can interpreted as
There is 95% confidence that the true proportion of Wal-Mart stores that have more than 2 items priced inaccurately per 100 items scanned lie within the interval
Considering question b
Generally 99% is outside the interval obtained in a above then the claim of Wal-mart is not believable
Considering question c
From the question we are told that
The margin of error is E = 0.05
From the question we are told the confidence level is 95% , hence the level of significance is
=>![\alpha = 0.05](/tpl/images/1007/6465/246a1.png)
Generally from the normal distribution table the critical value of
is
Generally the sample size is mathematically represented as
=>![n= [\frac{1.645 }}{0.05} ]^2 * 0.867 (1 - 0.867 )](/tpl/images/1007/6465/4cc60.png)
=>