recent survey found that 71% of all adults over 50 wear glasses for driving. In a random sample of 30 adults over 50, what is
1 answer:
Answer:
Mean = 21.3
Standard Deviation = 2.48
Step-by-step explanation:
We are given the following in the question:
p = 71% = 0.71
Sample size, n = 30
We have to find the mean and the standard deviation of those that wear glasses.
Thus, the mean of those who wear glasses is 21.3
Thus, the standard deviation of those who wear glasses is 2.48
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Answer:
The Federal taxes of total budget is 30%
C is correct.
Step-by-step explanation:
The chart below summarizes Ralph's annual expenses for the upcoming year.
We need to find the percentage for federal taxes.
First we find total annual budget from chart. We will add all the taxes.
Total annual budget = Federal taxes + State tax + Housing + Food + Medical +
Transportation + Recreation
Total Annual Budget = 18380 + 3448 + 15000 + 4880 + 6652 + 4332 + 3500 +
3260 + 1750
= 61202
Total Annual Budget = $61,202
Federal Taxes = $18,380
Now, we will find the percentage of federal taxes.
% of federal taxes
Hence, The Federal taxes of total budget is 30%
Answer:
the x² test statistic 13.71
Option a) 13.71 is the correct answer.
Step-by-step explanation:
Given the data in the question;
Feeder 1 2 3 4
Observed visits; 60 90 92 58
data sample = 300
Expected = 300 / 4 = 75
the x² test statistic = ?
= ∑[ (
-
)²/
]
= [ (60 - 75)² / 75 ] + [ (90 - 75)² / 75 ] + [ (92 - 75)² / 75 ] + [ (58 - 75)² / 75 ]
= [ 3 ] + [ 3 ] + [ 3.8533 ] + [ 3.8533 ]
= 13.7066 ≈ 13.71
Therefore, the x² test statistic 13.71
Option a) 13.71 is the correct answer.