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Completely randomized experiment and observational study. The makers of Frumpies, "the breakfast of rug rats," want to improve their marketing, so they consult you:
a) They first want to know what fraction of children, ages 10 to 13, likes their celery-flavoured cereal. What type of study should they perform?
b) They are thinking of introducing a new flavour, maple-marshmallow Frumpies, and want to know whether children will prefer the new flavour to the old one. Design a completely randomized experiment to investigate this question.
c) They suspect that children who regularly watch Saturday morning cartoon show starring Frump, the flying teenage warrior rabbit who eats Frumpies in every episode, may respond differently to the new flavour. How would you take that into account in the design?
Be sure the appropriate assumptions and conditions are satisfied before you proceed.
Any person who is familiar with these trees understand the height of a California redwood tree which is related to another characteristics of the tree.
The management of White companies considering a new method of assembling its golf cart. Compute which assembly time using the new method is faster.
To test there is significant difference among the mean of income using ANOVA. A developer of real estate is considering investing in a shopping mall on the outskirts of Atlanta, Georgia.
Sketch density curves that might explain distributions with fallowing shapes: symmetric, but with two peaks( i.e., two strong clusters of observations)
Suppose the population is normally distributed they make a decision to do a hypothesis test.
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
The results of a recent poll on the preference of shoppers regarding two products are shown below.
What percentage of the averages or medians of the sample will be greater than 140 seconds?
Testout the significance of the sample correlation also develop regression equation with scatter plot. Calculate chi-square is less than the critical value
The City Transit Authority plans to hire 8 new bus drivers. From the group of 100 qualified applicants, of whom 55 are men and 45 are women, 8 names are to be selected by lot. Suppose that Mary and John Lewis are among the 100 qualified applicants..
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