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Is the annual average wage of unmarried people (18 - 30) the same as that of married people (31 - 43)?
Hypothesis Statements:
H0: The mean annual wages of unmarried people (18 - 30) is the same as that of married people (31 - 43)
Ha: The mean annual wages of unmarried people (18 - 30) is different from that of married people (31 - 43).
A simple random sample of 50 adults is obtained, and each person's red blood cell count (in cells per micro-liter) is measured. The sample mean is 5.23. The population standard deviation for red blood cell counts is 0.54.
A check of dorm rooms on a large college campuses revealed that 38% had refrigerators, 52 percent had TVs and 21 percent had both a TV and a refrigerator. What's the probability that a randomly selected dorm room has.
The publisher of Celebrity Living claims that the mean sales for personality magazines that feature people such as Angelina Jolie or Paris Hilton are 1.5 million copies per week.
Given what you've learned in this module about the meaning of "statistics", choose one of the examples from Part I (A-F), and raise a relevant question of your own that could be answered by a statistician.
Describe the data appear the strength of the relationship among variables is sufficient to warrant using linear regression forecasting.
Using an appropriate statistical test determine if there is a significant association between gender and satisfaction with the new initiative.
The director of Heating and Oil at Mitchell Brothers Company is concerned about the high cost of home heating oil being offered to their customers for the upcoming Fall season in Boston, MA. The company has no possibility of modifying the oil pri..
A random check of 81 records of inmates from all federal prisons found the confidence interval for mean prison terms per prisoner to be 2.113 years to 2.287 years.
Using the finite population correction factor, compute the standard error for each of the three firms given a sample of size 50.
Suppose an unfair coin comes up tails 42% of the time if it is flipped. If the coin is flipped 13 times, what is the probability that?
Assume that the distribution is normal. Based on empirical rule how many students scored between 51 and 79.
If the population standard deviation is σ = 20 is the 6 point effect large enough to be statistically significant? Use the two - tailed test with α = .05
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