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Statistical literacy and critical thinking

Assignment Help Basic Statistics
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Basic Skills and Concepts

1 Correlation and Causality: What is meant by the statement that correlation does not imply causality?

2 Cause of Global Warming: If we find that there is a linear correlation between the concentration of carbon dioxide (CO2) in our atmosphere and the global temperature, does that indicate that changes in the concentration of carbon dioxide cause changes in the global temperature? Why or why not?

2: Basic Skills and Concepts

1 Best-Fitting Line: In what sense is the regression line the straight line that "best" fits the points in a scatterplot?

Statistical Literacy and Critical Thinking

1 Matched Pairs: Section 10-2 deals with correlation and Section 9-4 deals with inferences from matched pairs. Given that both sections deal with matched pairs of sample data, what is the basic difference between the goals of those two sections?

Interpreting r :A jeweler at Tiffany & Company computes the value of the linear correlation coefficient for pairs of sample data consisting of Tiffany prices for gold wedding rings and the corresponding prices at a discount store. She obtains a value of r = 1 and concludes that the prices at both companies are the same. Is she correct? Why or why not?

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Reference no: EM13781496

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Basic Statistics Questions & Answers

  Probability that sample mean will be within plus or minus

Show the sampling distribution of the mean amount of Medicare spending for a sample of fifty 2003 enrollees. What is the probability the sample mean will be within, plus or minus, $300 of the population mean?

  Estimating the probability values using normal distribution

Compute z values for each and comment on your findings.

  For the following problems do the following a draw

for the following problems do the followinga draw thenbspscatter plotnbspfor the variables.b compute thenbspcorrelation

  Compute sample standard deviation construct a 95 ci for the

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Determine the rejection region for the hypothesis  Ho  : mean D= 0 if  H a : mean  D  > 0. Use a = 0.01. z>

  The length of conversations between supervisors and workers

the length of conversations between supervisors and workers in a certain manufacturing industry is normally distributed

  A city ballot includes a local initiative that would

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Please identify a research question that can be addressed with a hypothesis test. An example might be to identify the presence of bacteria in a batch of milk.

  Z-score cutoff

Give the Z- score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected

  What would use for the null hypothesis

Suppose that you want to set up a statistical test to challenge the claim of 6.7 seconds. What would you use for the null hypothesis?

  Create linear programming model to find assigned salespeople

Formulate a linear programming model to determine how many salespeople should be assigned to each area next week to maximize profits.

  Translate the following statements into equivilant formal

translate the following statements into equivilant formal expressionsa. some things are not owned by anyone.b. some

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