PUB550 Topic 2 DQ 1

PUB550 Topic 2 DQ 1 for $8 Only

PUB550 Topic 2 DQ 1

P-values and confidence intervals are both used in hypothesis testing. Explain three reasons why it may be preferable to report a confidence interval over a P-value. Provide a specific example to justify your reasons.

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PUB-550 Week 2 Calculating Confidence Intervals

PUB550 Week 2 Calculating Confidence Intervals for $14 Only

Calculating Confidence Intervals

The purpose of this assignment is to practice calculating confidence intervals.

For this assignment, students will utilize Excel and SPSS Statistics and the “Example Dataset.”

Using the “Example Dataset,” complete the following:

  1. Based on a normal distribution curve, calculate the probability of an individual being 60 years or older in this population. Show the Excel and SPSS formulas or your hand calculations. Include screenshots as needed to illustrate this.
  2. Using the sample standard deviation of age as an estimate of the population standard deviation, calculate by hand the standard error of the mean. Show your calculations and the answer.
  3. Calculate by hand a 95% confidence interval for “Age” based on the sample mean. Use SPSS to verify your answer. Include your calculations and screenshots of the SPSS output.
  4. Interpret the confidence interval for age and explain the three pieces of information needed to calculate a confidence interval.

Submit one Word document that includes all of the assignment deliverables.

APA style is not required, but solid academic writing is expected.

This assignment uses a rubric. Please review the rubric prior to beginning the assignment to become familiar with the expectations for successful completion.

You are not required to submit this assignment to LopesWrite.

Attachments

PUB-550-RS-Example Dataset.xlsx

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Question Related to Confidence Intervals

Question Related to Confidence Intervals in $8 OnlyQuestion Related to Confidence Intervals

Confidence Intervals” (Note: Please respond to one [1] of the following two [2] bulleted items)

The vast majority of the world uses a 95% confidence in building confidence intervals.  Give your opinion on why 95% confidence is so commonplace. Justify your response.
Construct a hypothetical 95% confidence interval for a hypothetical case of your choosing. Use your own unique choice of mean, standard deviation, and sample size to calculate the confidence interval. Select one (1) option provided below and analyze what will happen to your confidence interval based on the option you selected:
The confidence changes to 90%.
The confidence changes to 99%.
The sample size is cut in half.
The sample size is doubled.
The sample size is tripled.
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