Concept explainers
Parking II. Suppose that, for budget planning purposes, the city in Exercise 14 needs a better estimate of the mean daily income from parking fees.
a) Someone suggests that the city use its data to create a
b) How would the
c) How could they achieve an
d) How many days’ worth of data should they collect to have
(a)
To explain how would this interval be better for the city.
Answer to Problem 16E
It will be narrower.
Explanation of Solution
It is given in the question that hoping to lure more shoppers downtown a city builds a new parking garage in the central business district. The city plans to pay for the structure through parking fees. During a two-month period, daily fees collected averaged
Thus, someone suggest that the city use its data to create a
(b)
To explain how the
Explanation of Solution
It is given in the question that hoping to lure more shoppers downtown a city builds a new parking garage in the central business district. The city plans to pay for the structure through parking fees. During a two-month period, daily fees collected averaged
Now, the
(c)
To explain how could they achieve an interval estimate that would better serve their planning needs.
Answer to Problem 16E
By increasing the sample size.
Explanation of Solution
It is given in the question that hoping to lure more shoppers downtown a city builds a new parking garage in the central business district. The city plans to pay for the structure through parking fees. During a two-month period, daily fees collected averaged
Thus, they could achieve an interval estimate that would better serve their planning needs because increase the sample size, because then the same level of confidence can be obtained while the confidence interval will become narrower.
(d)
To explain how many days’ worth of data should they collect to have
Answer to Problem 16E
The large sample size is
Explanation of Solution
It is given in the question that hoping to lure more shoppers downtown a city builds a new parking garage in the central business district. The city plans to pay for the structure through parking fees. During a two-month period, daily fees collected averaged
Now, we have to find how many days’ worth of data should they collect to have
It is given,
Mow, the formula to calculate the sample size will be:
Thus, for confidence level,
Now, the sample size is:
Thus, the large sample size is
Chapter 23 Solutions
Stats: Modeling the World Nasta Edition Grades 9-12
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