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1. A United Nations report shows the mean family income for Mexican migrants to the U.S.. is $27,000 per year. A FLOC evaluation of a sample 25 Mexican families units reveals a mean to be $30,000 with a sample standard deviation of $10,000. Is this information different from the United Nations report at .01 significance level.
2. A stockbroker at Critical Securities reported that the mean rate of return on a sample of 10 oil stocks was 12.6% with a standard deviation of 3.9%. The mean on a sample of 8 utility stocks was 10.9% with a standard deviation of 3.5%. At the .05 significance level, is there a difference in the variation of the oil stocks?
Must be clearly defined
1. Hypothesis statements
2. critical value
3. calculated statistics
4. p-value
5. decision to reject or not reject
6. final interpretation of decision #5
Determine mean and standard deviation for number of erroneous returns per batch.
Review the Christian year pie chart and write a summary in which you (a) describe the significance of the holy days on the chart.
A company produces two products that are processed on two assembly lines. Assembly line 1 has 100 available hours, and assembly line 2 has 42 available hours.
A vertical line is drawn through a normal distribution at z = -0.25, and separates the distribution into two sections. What proportion of the distribution is in the larger section?
Suppose 5.9% of certain population use public transportation to get to work. You randomly select 380 workers and ask them if they use public transportation to get to work.
Using a 5% level of significance, can we say that, generally there is important difference between satisfaction levels of mid country residents and coastal residents?
Professor Jennings claims that 35% of the students at Flora College work while attending school. Dean Renata thinks that the professor has underestimated the number of students with part time or full time jobs. A random sample of 81 students shows..
If a six appears for the second time, the process is repeated with the move depending on the number shown and the previous throws. If a six appears for the third time, the turn of the player ends without moving the token.
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
Suppose the following statistics were calculated from data gathered from a randomized block experiment with k = 4 and b = 10:
Computing the mean and standard errors of sampling distribution - Using the central limit theorem, find the means and standard errors of sampling distributions
Is there any statistically significant difference in how the drugs perform? If so, explain the effect. Use the post hoc tests as needed.
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