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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
two dice are tossed. let x be the smaller number of points. let y be the larger number of points. if both dice show the
The number who will go to the Ohio State University is a binomial random variable. What is the mean number of seniors going to the Ohio State University?
If (K, d) is a compact metric space and u ∈ K , show that for any finite M and 0 α ≤ 1, { f ∈ Lip(α, M ): | f (u)|≤ M } is compact for dsup. 2. If S = [0, 1] with its usual metric and α > 1, show that Lip(α, 1) contains only constant functions...
question a researcher finds a claim in the newspapers that the average room rate arr of all abu dhabi hotels is 163
Find the median, range, and standard deviation of the sample in the following is the number of minutes to commute from home to work for a sample of automobile executives.
the following data were collected for a test of linear correlation and spearmans rank correlation was used2.2 3.3 3.3
Mean income with an error of $500 can be constructed. If the population standard deviation is known to be $8,000 what sample size would the economist need to use?
An estimated regression coefficient is 10 with a standard error of 5. The null hypothesis is that the partial regression coefficient equals one.
a. Is it possible for a variance to be negative? Explain. b. What is the smallest value a variance can be? Under what conditions does the variance equal this smallest value?
Diamonds. Suppose that the couple shopping for a diamond in Example 28.15 (page 28-35) had used a quadratic regression model for the other quantitative variable, Depth. Use the data in Table 28.4 to answer the following questions.
At time t = 0, you begin counting the arrivals of buses at a depot. The number of buses Ki that arrive between time i - 1 minutes and time i minutes, has the Poisson PMF
checkout scanners - proportion problem. the federal trade commission ftc conducted a study in 1998 of checkout
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