म़ीरा ने किस को अपऩी जाग़ीर बताया है?class 10
1 answer:
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The ratio of overtime minutes to the cost of those minutes is 42 : 14.7
<em><u>Solution:</u></em>
Kayla went over the allotted cell phone minutes this month by 42 minutes
Therefore,
over time minutes = 42 minutes
Her regular bill is $39.95, but this month is was $54.65
Regular bill = $ 39.95
This month bill = $ 54.65
<em><u>Therefore, cost for overtime minute is given by:</u></em>
cost for overtime minute = This month bill - regular bill
cost for overtime minute = $ 54.65 - $ 39.95
cost for overtime minute = 14.7
<em><u>Thus ratio of over time minutes to cost of those minutes is given by:</u></em>
Thus the required ratio is found
Answer:
The 95% confidence interval for the proportion of parents that are satisfied with their children's education is (0.4118, 0.4618). 0.5 is not part of the confidence interval, so this represents evidence that parents' attitudes toward the quality of education have changed.
Step-by-step explanation:
We have to see if 50% = 0.5 is part of the confidence interval.
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 .
For this problem, we have that:
95% confidence level
So , z is the value of Z that has a pvalue of
, so
.
The lower limit of this interval is:
The upper limit of this interval is:
The 95% confidence interval for the proportion of parents that are satisfied with their children's education is (0.4118, 0.4618). 0.5 is not part of the confidence interval, so this represents evidence that parents' attitudes toward the quality of education have changed.