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1) A quality control specialist for a restaurant chain takes a random sample of size 15 to check the amount of soda served in the 16 oz. serving size. The sample average is 15.5 with a sample standard deviation is 2.45. Find the 95% confidence interval for the mean amount of soda in a serving. You cannot assume the underlying population is normally distributed.
Show your value for E and your confidence interval
2) One of your distributors reports an average of 175 sales per day. You suspect that the average is different from 175, so you select 42 days and determine the number of sales each day. The sample mean is 166 with a standard deviation of 20 sales. At alpha = 0.01, is there enough evidence to doubt the distributor's reported average?
Show your hypothesis your calculated z or t score and your decision to accept or not accept the null hypothesis.
10 cobalts are ramdomly selected and the miles per gallon for each car are recorded. What is the probability that the mean miles per gallon exceeds 34 miles per gallon?
Given the times (minutes) in file XR14040, and using the 0.05 level of significance, can it be concluded that the slopes could be equally difficult? Identify and interpret the p-value for the test.
a song writer wishes to compose a melody. each note in the melody must be one of the 14 notes in her vocal range. how
the data for a random sample of eight paired observations are shown in the table belowpair 1population 1population
Suppose that 15% of the population is left-handed. If 20 people are selected at random, find the probability that exactly 4 of them are left-handed.
Create a presentation describing 9 different research methodologies and designs that you find interesting. Also, include information describing the IRB and its purpose.
Explain how you would settle on a reasonable level of significance for your scenario. Also explain what the type I and II errors would be if you reached the incorrect conclusion in your test.
Charmers' Candy Store sells wrapped hard candies in the following flavors: strawberry, blueberry, lemon, lime, and orange. They advertise that there are equal proportions of each flavor in every size of their candy boxes.
The Court of Appeals erred in stating that petitioners'regression analyses were "unacceptable as evidence of discrimination", because they did not include all measurable variables thought to have an effect on salary level.
Show that for any metric space S, if A ⊂ S and x ∈ A\ A, then there is a bounded, continuous real-valued function on A which cannot be extended to a function continuous on A∪{x }. Hint: f (t ) := sin(1/t ) for t > 0 cannot be extended continuously..
A particular type of tennis racket comes in a midsize version and an oversize version. Sixty percent of all customers at a certain store want the oversize version.
production records indicate that 1.5 of the light bulbs produced in a facility are defective. a random sample of 22
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