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Calculate the change in pH when 6.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
a psychologist wants to determine if there is a linear relationship between the number of hours a person goes without
Weekly demand at a grocery store for a brand of breakfast cereal is normally distributed with mean of 800 boxes and a standard deviation of 75 boxes. What is the probability that demand is 959 boxes or less?
Under what circumatances do you use a one-sided confidence interval instead of a 2 sided confidence interval?
are americas top chief executive officers ceos really worth all that money? one way to answer this question is to look
x1 = 100 and x2 = 127 successes were observed. What is the best point estimator for the difference ( p1-p2) in the two binomial proportions?
If the store orders three copies of the magazine, what is the mean value of the profit? (Profit = Revenue - Cost). If the store orders four copies of the magazine, is it better to order four than three copies of the magazine. Explain.
The function that defines the probability distribution of a continuous random variable is a?For a continuous random variable x, the probability density function f(x) represents.
A nectarine-packing firm claims that the nectarines they ship have a mean weight of 5.22 ounces. A test on n = 10 randomly selected nectarines, gave the following results, in ounces:
In order to compare the mean charges for the three groups, the data will be subjected to an analysis of variance. Write the null hypothesis tested by the ANOVA.
determine the sample size needed to construct a 90 confidence interval to estimate the population mean when ? 75 and
scores derived from a patient satisfaction survey are normally distributed with u 50 and sigma7.5 with high score
Estimate the population mean time that the Internet users spend watching television and place a bound on the error of estimation.
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