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The first step in any data analytical undertaking is to conduct basic data due diligence, the focus of which is on assessing the scope and limitations of your data. This is an important step as virtually all business data contains some degree of imperfection, such as missing values, miscoded variables, or nonsensical values (such as a person being five hundred years old). Beyond looking for flaws in data, data due diligence also entails describing the basic characteristics of data, such as the number of variables, number of cases, ranges of values of individual variables, variable types, etc. This week, as the first step in your data analytical project, you will put together a step-by-step outline of the data due diligence process that you would follow and provide a rationale for each step in your process.
What contingency table test is used to see if there is a difference in the frequency distribution for two different groups?
BMI in children is approximately normally distributed with a mean of 24.5 and a standard deviation of 6.2. A BMI between 25 and 30 is considered overweight. What proportion of children are overweight?
q1. determine the value of the coefficient of correlation for the following datax15829687110436y349510301322550q2. a
Assume that the population is normally distributed. Can we conclude at the 0.01 level of significance that the mean waiting time on special orders at this furniture store exceeds 28 days? Perform a one-tailed test.
In a sample of 88 children selected randomly from one town, it is found that 8 of them suffer from asthma. Find the P value for a test of the claim that the proportion of all children in the town who suffer from asthma is equal to 11%.
What is the difference between a randomized ANOVA and a repeated measures ANOVA? What does the term one-way mean with respect to an ANOVA?
What is the purpose of sampling? What are some concerns and dangers of sampling? How important is the sample design to data validity? Explain.
What is the Bonferroni adjustment? What would the Bonferroni adjustment be for a study with four groups for which a researcher decided to use t-tests?
At the .05 significance level, is the number of units produced on the afternoon shift larger?
What is the proportion of people surveyed that rated the subway system from 3 to 4. What is the proportion of people surveyed rated the Subway System from 1 to 3.
Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20 °F and a standard deviation of 0.62 °F. Is body temperature of 99.00 °F unusual? Why or why not?
Create and answer two exponential model questions: Formula y = ab^x. Create and answer two continuously compounded interest questions: Formula A = Pe ^r*t
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