Question

According to the U.S. Bureau of Labor Statistics, the average weekly earnings of a production worker in July 2011 were $657.49. Suppose a labor researcher wants to test to determine whether this figure is still accurate today. The researcher randomly selects 55 production workers from across the United States and obtains a representative earnings statement for one week from each. The resulting sample average is $672.84. Assuming a population standard deviation of $63.90 and a 5% level of significance, determine whether the mean weekly earnings of a production worker have changed.

Appendix A Statistical Tables

*(Round your answer to 2 decimal
places.)*

The value of the test statistic is ______________________ and we _______________________ (reject the null hypothesis or fail to reject the null hypothesis.) |

Answer #1

Null hypothesis

Alternative hypothesis

We have given,

Population mean for given example =$657.49

Sample mean=$672.84

Population standard deviation = $63.9

Sample size for given example = 55

Level of significance =0.05

Z test statistic formula

=1.78

P value =0.0751.....................by using Z table or Excel command =2*(1-NORMSDIST(1.78))

P value > 0.05

The value of the test statistic is 1.78 and we fail to reject the null hypothesis. |

According to the U.S. Bureau of Labor Statistics, the average
weekly earnings of a production worker in July 2011 were $657.49.
Suppose a labor researcher wants to test to determine whether this
figure is still accurate today. The researcher randomly selects 53
production workers from across the United States and obtains a
representative earnings statement for one week from each. The
resulting sample average is $672.44. Assuming a population standard
deviation of $63.90 and a 5% level of significance, determine...

According to the U.S. Bureau of Labor Statistics, the average
weekly earnings of a production worker in July 2011 were $657.49.
Suppose a labor researcher wants to test to determine whether this
figure is still accurate today. The researcher randomly selects 53
production workers from across the United States and obtains a
representative earnings statement for one week from each. The
resulting sample average is $672.65. Assuming a population standard
deviation of $63.90 and a 1% level of significance, determine...

According to the U.S. Bureau of Labor Statistics, the average
weekly earnings of a production worker in July 2011 were $657.49.
Suppose a labor researcher wants to test to determine whether this
figure is still accurate today. The researcher randomly selects 54
production workers from across the United States and obtains a
representative earnings statement for one week from each. The
resulting sample average is $672.41. Assuming a population standard
deviation of $63.90 and a 5% level of significance, determine...

According to the U.S. Bureau of Labor Statistics, the average
weekly earnings of a production worker in July 2011 were $657.49.
Suppose a labor researcher wants to test to determine whether this
figure is still accurate today. The researcher randomly selects 53
production workers from across the United States and obtains a
representative earnings statement for one week from each. The
resulting sample average is $672.15. Assuming a population standard
deviation of $63.90 and a 1% level of significance, determine...

According to the U.S. Bureau of Labor Statistics, the average
weekly earnings of a production worker in July 2011 were $657.49.
Suppose a labor researcher wants to test to determine whether this
figure is still accurate today. The researcher randomly selects 53
production workers from across the United States and obtains a
representative earnings statement for one week from each. The
resulting sample average is $670.16. Assuming a population standard
deviation of $63.90 and a 10% level of significance, determine...

According to the U.S. Bureau of Labor Statistics, the average
weekly earnings of a production worker in manufacturing in the
United States as of October 2014 was $827.27. Suppose a labor
researcher wants to test to determine whether this figure is still
accurate today. The researcher randomly selects 54 production
workers from across the United States and obtains a representative
earnings statement for one week from each worker. The resulting
sample average is $843.56. Assuming a population standard deviation
of...

Case 6-3: US Production Wages 2005
According to the bureau of labor statistics, the average weekly pay
for a US production worker was $500 in 2005. Assume that available
data indicate that wages are normally distributed with a standard
deviation of $150.
Refer to Case 6-3: US Production Wages 2005
How much, at the minimum, does a production worker have to earn to
be in the top 20% of wage earners?
1.
$626.00
2.
$517.44
3.
$584.16
4.
$373.76
5....

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dentistsâ€™ incomes in 2011 is $36,000. a. We want to test to
determine if there has been a significant increase in the average
yearly income of dentists. Provide the null and the alternative
hypotheses. ( please...

9.6
A computer manufacturer estimates that its line of minicomputers
has, on average, 8.7 days of downtime per year. To test this claim,
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computers and is allowed to access company computer records. It is
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The U.S. Bureau of Labor Statistics released hourly wage figures
for various countries for workers in the manufacturing sector. The
hourly wage was $30.67 for Switzerland, $20.20 for Japan, and
$23.82 for the U.S. Assume that in all three countries, the
standard deviation of hourly labor rates is $4.00.
Appendix A Statistical Tables
a. Suppose 35 manufacturing workers are selected
randomly from across Switzerland and asked what their hourly wage
is. What is the probability that the sample average will...

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