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1 answer:
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Complete Question
The complete question is shown on the first uploaded image
Answer:
a
b
c
The correct option is D
Step-by-step explanation:
From the question we are told that
The margin of error is
The largest value is k = 15
The smallest value is u = 7
From the question we are told the confidence level is 95% , hence the level of significance is
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Generally from the normal distribution table the critical value of is
Generally population standard deviation estimate is mathematically represented as
Here the Range is mathematically represented as
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Generally the sample size is mathematically represented as
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Generally to obtain a conservatively small sample size the population standard deviation estimate becomes
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Generally the conservatively small sample size is mathematically evaluated as
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Answer:
Step-by-step explanation:
Suppose the electrician spends t hours at the house working.
Amount charged for every house call by electrician = $50
The electrician earned a total of $400 for a 5 hour job.
Also, C denotes total cost of the electrician's services.
So, the equation for C in terms of t is given below.
Here,