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The Manager at a light bulb factory wants to determine whether there is any difference in the mean life expectancy of light bulbs manufactured
The manager of a paint supply store wants to determine whether the mean amount of paint conatined in 1- gallon cans purchase
A study to see how well marital dissolution was predicted by the personality scores of husbands and wives was published in the Journal of Personality
The mean heart rate(beats per minute) for a random sample of 31 patients with congestive heart failure who were given Captopril was 75.2 bpm
Mean score on 10 item test for all students enrolled in a Traditional course was 9.64. A random sample of 41 students in Project Course is given same test
Hypothesis test for two independent proportions
Faced with rising FAX costs, a firm issued a guideline that transmissions of 10 or more should be sent by 2-day mail instead
A fast-food franchiser is considering building a restaurant at a certain location. Based on financial analysis, a site is acceptable only
Say a fast-food franchiser is considering building a restaurant in a local mall. According to franchise headquarters, a site is acceptable only
Using ratio or interval numerical data from the data set attached, develop the following:
State your null and alternative hypothesis for the following cases. Please explain how do you make that decision on which is alternative and which is null.
Explain the difference between testing a single mean, testing the difference between two means from an "independent sample" and testing mean differences
A National retail chain has 7 different strategies (S1 to S7) to increase its sell. None of these strategies work all the time
A certain type of cable was advertised as having a breaking strength of 1000 pounds. A test of XX pieces of this cable was conducted and the mean
A steel pipe fittings company claims that the yield strength of its non-tempered couplings is more variable than that of its tempered couplings
A legal researcher is studying the age distribution of juries by comparing them with the overall age distribution of available jurors
Given the following data from two independent samples from which the population standard deviation is known, conduct a two-tailed hypothesis test
The following sample data shows the quarterly earnings in millions for two US companies
How do hypothesis-testing procedures differ for the population mean when the population standard deviation is known or unknown?
What do you remember from the CLT and it's implications? Please touch up on them
Write the claim mathematically and identify Ho and Ha, (b) find the critical value(s) and identify the rejection region(s)
At this point of your research, you are ready to test the hypothesis (or hypotheses) you have formulated in your experimental design
The general social survey is an annual survey given to about 1,500 U.S. adults selected at random.
Radon is a gas produced when radium decays, and it can enter homes where it can become a health threat.
A recent study examined a random sample of 127 houses built in Southern California between 1950 and 1985 and an independent,random sample