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A flour mill produces flour in small bags before distributing them to wholesalers. The average weight of each bags is 8 kg with a standard deviation of 0.5 kg. A random sample of 50 bags was taken and found that the average weight is 7.8 kg. Using a significance level of 0.01, test the hypothesis that µ = 8 kg against the alternative µ<8 kg.
If person is selected at random and tested, determine the probability of that person having an IQ score between 85 and 115. Make use of EXCEL to help determine the probability.
You calculate the difference in income as (after incentive plan - before incentive plan). You want to test whether income after the incentive plan is different from income before the incentive plan. What are the hypotheses for this test?
You will be graded on accuracy, completeness (addressing each point above), and effectiveness (utility, ease of reading).
At the 5 percent level of significance, can we conclude that the mean weight is greater than 16 ounces? Determine the p- value.
What is Peter's median grade point at graduation? What is the shape of the grade point distribution?
Calculate the average or the median of the average or medians of the samples and compare it with the average of the population.
At the .01 significance level, is there a relationship between job pressure and age?
Compare value of test statistics F obtained in part(2) with value of t 2 , square of test statistic for testing H 0 : β 1 =0 that was needed in test null hypothesis that true slope is 0. Interpret the results of this test.
What is the value of the population mean? What is the best estimate of this value?
A two-way ANOVA model was used to analyze an experiment with two levels of one factor, three levels of a second factor, and 6 observations per treatment combination.
Can you conclude that information in article is untrue? Use 0.05 significance level. Find out p-value and explain its meaning.
Suppose there is no cyclical component. Quarterly billing for water usage is shown below describe summer billing for year 5.
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