A new operator was recently assigned to a crew of workers who perform a certain job....
A new operator was recently assigned to a crew of workers who perform a certain job. From the records of the number of units of work completed by each worker each day last month, a sample of size five was randomly selected for each of the two experienced workers and the new worker. At the α = .05 level of significance, does the evidence provide sufficient reason to reject the claim that there is no difference in the amount of work done by the three workers?
| Workers | |||
| New | A | B | |
| Units of work (replicates) | 10 | 13 | 11 |
| 9 | 13 | 9 | |
| 10 | 12 | 12 | |
| 9 | 12 | 10 | |
| 11 | 11 | 11 | |
(a) Find the test statistic. (Give your answer correct to two
decimal places.)
(ii) Find the p-value. (Give your answer bounds
exactly.)
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A new operator was recently assigned to a crew of workers who
perform a certain job....
A new operator was recently assigned to a crew of workers who perform a certain job. From the rec...
A new operator was recently assigned to a crew of workers who perform a certain job. From the records of the number of units of work completed by each worker each day last month, a sample of size five was randomly selected for each of the two experienced workers and the new worker. At the α = .05 level of significance, does the evidence provide sufficient reason to reject the claim that there is no difference in the amount of...
A new operator was recently assigned to a crew of workers who perform a certain job....
A new operator was recently assigned to a crew of workers who perform a certain job. From the records of the number of units of work completed by each worker each day last month, a sample of size five was randomly selected for each of the two experienced workers and the new worker. At the α = .05 level of significance, does the evidence provide sufficient reason to reject the claim that there is no difference in the amount of...
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1A) A large supermarket carries four qualities of ground beef. Customers are believed to purchase these four varieties with probabilities of 0.13, 0.16, 0.13, and 0.58, respectively, from the least to most expensive variety. A sample of 482 purchases resulted in sales of 46, 151, 88, and 197 of the respective qualities. Does this sample contradict the expected proportions? Use α = .05. (a) Find the test statistic. (Give your answer correct to two decimal places.) (b) Find the p-value....
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PART F PART i In 1955, Life Magazine reported that a 25-year-old mother of three worked,...
PART F PART i
In 1955, Life Magazine reported that a 25-year-old mother of three worked, on average, an 80 hour week. Recently, many groups have been studying whether or not the women's movement has, in fact, resulted in an increase in the average work week for women (combining employment and at-home work). Suppose a study was done to determine if the mean work week has increased. 68 women were surveyed with the following results. The sample mean was 83;...
In testing a new machine, a factory does an experiment in which 8 workers are randomly...
In testing a new machine, a factory does an experiment in which
8 workers are randomly selected with 4 being experienced and 4
being less experienced. 2 from each group are assigned to the old
machine and 2 to the new machine. They all operate their respective
machine for a week and output is recorded. Answer the following
questions regarding the results of the experiment.
output
experience
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14
L
N
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O
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O...
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PART F PART i
In 1955, Life Magazine reported that a 25-year-old mother of three worked, on average, an 80 hour week. Recently, many groups have been studying whether or not the women's movement has, in fact, resulted in an increase in the average work week for women (combining employment and at-home work). Suppose a study was done to determine if the mean work week has increased. 68 women were surveyed with the following results. The sample mean was 83;...
In testing a new machine, a factory does an experiment in which
8 workers are randomly selected with 4 being experienced and 4
being less experienced. 2 from each group are assigned to the old
machine and 2 to the new machine. They all operate their respective
machine for a week and output is recorded. Answer the following
questions regarding the results of the experiment.
output
experience
machine
14
L
N
15
L
N
10
L
O
11
L
O...
5. In randomized, double-blind clinical trials of a new vaccine, children were randomly divided into two groups. Subjects in group 1 received the new vaccine while subjects in group 2 received a control vaccine After the second dose, 115 of 485 subjects in the experimental group (group 1) experienced fever as a side effect. After the second dose, 106 of 574 of the subjects in the control group (group 2) experienced fever as a side effect. Does the evidence suggest...
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