Answer:
(B) a = 41%, b = 3%
Step-by-step explanation:
The result from the survey is given below:
The second table is given as:
Now, from the first table
Total Number of Respondents =116
Therefore:
Therefore:
a=41%
b=3%
The correct option is B.
Imagine a model shaded to show 0.001 How much would be shaded?
1 answer:
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Answer:
95% of monthly food expenditures are between $110 and $190.
Step-by-step explanation:
Given : The monthly amounts spent for food by families of four receiving food stamps approximates a symmetrical, normal distribution. The sample mean is $150 and the standard deviation is $20.
To find : Using the Empirical rule, about 95% of the monthly food expenditures are between which of the following two amounts?
Solution :
At 95% of the data is between two standard deviation to left and right of the mean is given by,
To the left side,
To the right side,
We have given,
The sample mean
The standard deviation
Substitute in the formula,
Therefore, 95% of monthly food expenditures are between $110 and $190.