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The cost of 5 gallons of ice cream has a variance if 49 with a mean of 30dollars. What is the probability that the sample would differ from the true mean by less than 0.6 dollars if the sample of 145 5 gallon pails is randomly selected.
Country A and Country C spends about the same amount on average per person per year. Which has the greater spread?
find the lower end point of a 95 confidence interval for a population proportion based on a sample size of 100 if the
a light bulb is advertised as lasting an average of 1000 hours with a standard deviation of 150 hours. find the
How much difference does the choice of model make? Which forecasts do you trust the most, and why? (f) If you have access to Ward's Automotive Yearbook, check your forecasts.
Whether the suitable analysis would be one-tailed test or two-tailed test. A type I and type II error, given context of hypothesis.
The president of a bank is attempting to arrange a meeting with the three vice presidents for a friday
the proportion of americans who are satisfied with the way things are going in their lives is 0.76. suppose that a
i what is the sampling distribution of a sampe mean for a normally distributed random variable.ii if a variable iq is
Obtain a 95% con?dence interval for home price. Do parametric or nonparametric methods seem more appropriate for the data? Obtain a scatterplot between the square-foot area of a home and its price.
Bill calculates a linear correlation coefficient between two variable as 1.20. How would you interpret this?
Mike has est that the store sells about 800 SONY sets annually. Estimated holding cost is $30 per set and ordering cost is $20 per order. Describe the inventory pattern graphically.
In random, independent samples of 250 adults and 375 teenagers who watched a certain television show, 147 adults and 228 teens indicated that they liked the show.
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