Questions from General Chemistry

Q: In a volumetric determination of an analyte A, the data obtained

In a volumetric determination of an analyte A, the data obtained and their standard deviations are as follows: From the data, find the coefficient of variation of the final result for the %A that is o...

Q: State quantitatively the null hypothesis H0 and the alternative hypothesis Ha for

State quantitatively the null hypothesis H0 and the alternative hypothesis Ha for the following situations, and describe the type I and type II errors. If these hypotheses were to be tested statistica...

Q: Describe the steps in a sampling operation.

Describe the steps in a sampling operation.

Q: Nine samples of illicit heroin preparations were analyzed in duplicate by a

Nine samples of illicit heroin preparations were analyzed in duplicate by a gas chromatographic method. The samples can be assumed to have been drawn randomly from the same population. Pool the follow...

Q: Calculate a pooled estimate of s from the following spectrophotometric analysis for

Calculate a pooled estimate of s from the following spectrophotometric analysis for NTA (nitrilotriacetic acid) in water from the Ohio River:

Q: Go to http://dx.doi.org/10.

Go to http://dx.doi.org/10.18434/T43G6C, where you will find a link to the NIST Statistical Reference Datasets site. Find the Dataset Archives, locate the Univariate Summary Statistics section, and se...

Q: Differentiate between a. Parameter and statistic. b.

Differentiate between a. Parameter and statistic. b. Population mean and sample mean. c. Random and systematic error. d. Accuracy and precision.

Q: Write the equilibrium-constant expressions and obtain numerical values for each

Write the equilibrium-constant expressions and obtain numerical values for each constant in a. The basic dissociation of aniline, C6H5NH2. b. The acidic dissociation of hypochlorous acid, HClO. c. Th...

Q: Distinguish between a. The sample variance and the population variance

Distinguish between a. The sample variance and the population variance. b. The meaning of the word sample as it is used in a chemical and in a statistical sense.

Q: What is the standard error of a mean? Why is the

What is the standard error of a mean? Why is the standard deviation of the mean lower than the standard deviation of the data points in a set?