A 99% confidence interval for the population mean of high school students that take the bus to school every day is b) ci=(44.34%, 54.43%)
We need to find the 99% confidence interval for the population mean of high school students that take the bus to school everyday
A confidence interval is a range of estimates for an unknown parameter. The confidence interval is calculated at the specified confidence level; the most common is the 95% confidence level, but sometimes other levels are used, such as 90% or 99%.
The confidence interval of proportions is given by:
π ± z √(π (1-π) /n)
π is the sample proportion.
z is the critical value.
n is the sample size.
For 99% confidence interval the value of z is 2.58
π = 321/650
The confidence interval is given by
=321/650 ± 2.58 √( (321/650) × [ 1 - (321/650) ] ÷ 650)
= (0.493846 ± 0.050594)
=(0.4434 , 0.5443)
=(44.34 % , 54.43 %)
Hence a 99% confidence interval for the population mean of high school students that take the bus to school every day is ci=(44.34%, 54.43%)
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# SPJ4
Answer: 105 grams
Step-by-step equation: they each eat 21 grams a day
<span>-2×5+-8
We carry out the multiplication first.
-2 × 5 = -10
</span><span>-2×5+-8
= -10 + -8
+(-) = -
</span>
<span> -10 + -8 = -10 - 8 = - (10 + 8) = -18
I hope this helps.</span>
Answer:
-3x/2
Step-by-step explanation:
Angle c because b come before c
