Concept explainers
(a)
To Explain: Assign the day and used the partial line of random digits given below for Design A and Design B. Then use the plan to pick the first three days for Design A to be used.
(a)
Answer to Problem 47E
Day 21,24 and 55 were chosen for design A.
Explanation of Solution
Given:
every day of the 60 days a different number between 1 and 60.
chose the 1st 2-digit number.
If the number is between 01 and 60, pick the corresponding day for design A, then forget the number and move on to the next 2-digit number. Repeat the process until design A has chosen 30 days and repeated numbers are ignored. To build A, the remaining 30 days are assigned.
find the 1st 3 days for the design A:
Thus day 21, 21 and 55 were selected for design A.
(b)
To Explain: the choice that is it one-sided or two-sided significance test.
(b)
Answer to Problem 47E
Two-sided
Explanation of Solution
If there is a difference, testing is needed and then a two-sided significance test is best used. The null hypothesis says the mean of the population is equal:
The opposite of the null hypothesis is stated by the alternative hypothesis and uses the symbol since use the two-sided significance test.
(c)
To Calculate: The P-value and degree of freedom.
(c)
Answer to Problem 47E
29
Explanation of Solution
Given:
The degrees of freedom are
(d)
To find: The P-value using the Table B and the conclusion.
(d)
Answer to Problem 47E
0.05
Explanation of Solution
Given:
Calculation:
The degrees of freedom are
The P-value is the
There is enough proof to support the claim that there is a difference.
Chapter 10 Solutions
The Practice of Statistics for AP - 4th Edition
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Basic Business Statistics, Student Value Edition
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Fundamentals of Statistics (5th Edition)
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