Calculate the 95% confidence intervals for each

Assignment Help Mechanical Engineering

Reference no: EM131083837

Nakahara and Wasa determined germanium in meteorites by ICP-AES using microwave digestion and hydride generation.30 Consider the following data table from the referenced paper, which compares results of the work with accepted values for germanium in various meteorites.

(a) Calculate the 95% confidence intervals for each of the results of Nakahara and Wasa.

(b) Assume that the reported values are the true values for the concentration of germanium in the meteorites, and determine whether the values determined by these workers are equal to or different from the reported values at the 95% confidence level.

(c) Consider the number of significant figures in the standard deviations cited in the table. [s the number of digits justified in each case') Support your answer with statistical calculations.

Reference no: EM131083837

Questions Cloud

Test the hypothesis that your result is equal to this value : Compare your result to the result reported by Whitehead et aI., and comment on any differences.

Question regarding the knowledge of astronomy : A group of professors investigated first-year college students' knowledge of astronomy. One concept of interest was the Big Bang theory of the creation of the universe.

Observe a call and reject the null hypothesis : The duration of a voice telephone call is an exponential random variable T with expected value E[T] = 3 minutes. Data calls tend to be longer than voice calls on average. Observe a call and reject the null hypothesis that the call is a voice call ..

Distribution of the two variables of interest : 1. Describe the distribution of the two variables of interest - gender and test scores - using a graphing technique and/or appropriate measures of central tendency and variability.

Calculate the 95% confidence intervals for each : Consider the number of significant figures in the standard deviations cited in the table. [s the number of digits justified in each case') Support your answer with statistical calculations.

The lifetime of a microchip operated at temperature : When a chip fabrication facility is operating normally, the lifetime of a microchip operated at temperature T , measured in degrees Celsius, is given by an exponential (λ) random variable X with expected value E[X] = 1/λ = (200/T )2 years.

Define the term independent and independent variable : Define the term independent and independent variable for this study - describe the scale of measurement used for the independent variable.

Sampled from the last hour production : The process is designed to produce tees with a mean weight of .252 ounce. To investigate whether the injection molded is operating satisfactorily, 40 tees were randomly sampled from the last hour's production.

Different approaches to addiction management and treatment : Discuss and compare the different approaches to addiction management and treatment (medical, social, cognitive-behavioral). What are the advantages and disadvantages of the different approaches?

User Account

All Pages