Mathematics, 26.04.2021 23:30 tbair5417
The mean weekly earnings of a sample of 30 construction workers in a city in Texas was $759, with a standard deviation of $73. In the state of Texas, the mean weekly earnings for construction is $728.
a)Construct a 95% confidence interval for the sample (T-interval)
b) Explain what the confidence interval means
c) Is it reasonable to say that the workers in the city are getting paid more than the average worker in Texas? Carefully explain your reasoning
Answers: 2
Mathematics, 21.06.2019 18:30
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Mathematics, 22.06.2019 02:30
Aresearch study is studying the effects of a new drug for osteoporosis alzheimer's disease (ad) for women above the age of 65 years. a group of individuals with osteoporosis is randomized into two groups. one group is treated conventionally, and the second group is treated with the new medication. assessments are made at 3, 6, 12, 36, and 48 months. the conventionally treated group is assessed for ad using a serum blood test, and the treatment group is assessed for ad using a pet radiotracer that binds to beta-amyloid plaques. in comparing these 2 trial arms, the authors of the study may encounter which type of bias? a. selection bias on the risk of developing b. measurement bias c. confounding bias d. recall bias e. lead-time bias
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The mean weekly earnings of a sample of 30 construction workers in a city in Texas was $759, with a...
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