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In each case, identify the population parameter about which a claim is made, state the null and alternative hypotheses for a hypothesis test
The production line that packages boxes of raisins at a snack food manufacturer will be considered operating properly if the average weight of the boxes
Choose any published database from either the Census Bureau, the Bureau of Labor Statistics, Federal Statistics, Yahoo! Sports, or any major Web site
A machine produces 5-inch nails. A sample of 12 nails was selected and their lengths determined. The results are as follows:
A sample of 25 concession stand purchases at the October 22 matinee of Bride of Chucky showed a mean purchase of $5.29 with a standard deviation of $2.78
The effectiveness of a new headache medicine is tested by measuring the amount of time before the headache is cured for patients who use the medicine
A United Nations report shows the mean family income for Mexican migrants to the United States is $27,000 per year. A FLOC(Farm Labor Organizating Committe)
Express the null hypothesis H0 and the alternative hypothesis H1 in symbolic form. Use the correct symbol (u,p, s) for the indicated parameter
Suppose a population has average weight of 71 kgs. A sampling of that population resulted in the following weights:
Regarding four scales referring to levels of measurement: Nominal, Ordinal, Interval and Ratio.
A study of the sleep patterns of 6-month-old infants in the United States reported a 95% confidence interval for the average amount of time infants sleep
A new cell phone battery is being considered as a replacement for the current one. Ten college student cell phone users are selected to try each battery
If the p-value is less than a in a two-tailed test, the null should be rejected.
An auditor reviewed 25 oral surgery insurance claims from a particular surgical office, determining that the mean out-of pocket patient bill
In the 2005 Major League Baseball season, a random sample of 10 American League teams' home runs showed a mean total of 175.3 with a standard deviation of 31.7
The value of the z score in a hypothesis test is influenced by a variety of factors.
A consumer advocacy group is doing a large study on car rental practices. Among other things, the consumer group would like to do a statistical test
The Web-based company Oh Baby! Gifts have a goal of processing 95 percent of its orders on the same day they are received
We have to make a decision about the given claim. For example, if the claim is that a coin favors heads and sample results consists of 11 heads in 20 flips
A study has been carried out to compare the United Way contributions made by clerical workers from three local corporations
Explain the double-negative logic of hypothesis testing (eg: a scientist fails to reject the null hypothesis).
The Chamber of Commerce of a Florida community advertises that area residential property is available at a mean cost of $25,000 or less per lot.
A student wants their College to offer Kickboxing classes as a Physical Education class. To justify that the class is desired he surveys 200 students
What is the difference between a null hypothesis and an alternative hypothesis? Is the null hypothesis always the same as the verbal claim or assertion
Null Hypothesis: "There is no difference between the mean price of automobiles bought by younger and older consumers."