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A research firm supports a consumer panel of 2000 households that keep written diaries of their weekly grocery expenditures. The firm would like to estimate, with 95% confidence and within 4 percentage points, the percentage of its panel households who would be interested in providing more extensive information in return for an extra $50 per week remuneration.
How many of the households should be surveyed? Explain any assumptions you used in obtaining your recommended sample size.
On average 2.4 customers per minute arrive at an airline check-in desk during the peak period. Assume that the distribution of arrivals is Poisson. Then T the time between 2 arrivals will be exponential. What is the probability that a customer will..
Explain in your own words how to recognize a situation where you needed to use a two-sample test. Give a unique example of a two sample test for proportion or mean. Make sure to detail why only a two sample test would suffice.
Conduct an ANOVA comparing the anxiety levels (at posttest only) of participants across all three treatment conditions: CBT, psychodynamic, and supportive therapy.
an exit poll of 1000 randomly selected voters found that 515 favored candidate a. is the race too close to call? answer
Sunspots have fascinated people for hundreds of years. - Make a time plot of the sunspot data.- With the help of a smoother, discuss the cycle that astronomers see.
The soap and detergent association issued its fifth annual clean hands report card survey for 2009.
In the order of operations Pemdas requires that exponentation takes precedence over multiplication, so we cannot multiply 4*2 without first evaluating 2^x, but we could divide both sides by 4.
Summarize the results of the data analysis.
Employees flexible scheduling? What is the p-value for this test?
Students applying for admission to an MBA program must submit scores from the GMAT test, which includes a verbal and a quantitative component.
the supplies for the construction of a reinforced concrete building are supplied by the company a and b. the company a
the cpu of a personal computer has a lifetime that is exponentially distributed with a mean lifetime of six years. you
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