Suppose we want to study how long customers wait on average to return something. We record 50 customers time to return an item, which is the number of days […]
Statistics
Statistics in Criminal Justice
Multiple Choice (3 points each) 1. Which of the following correlation coefficients signifies the weakest correlation? A. -0.28 B. -0.76 C. +0.12 D. […]
Data exploration
Explore the Remington’s Data Set by doing the following: Calculate and interpret the mean and standard deviation on the variables measured in questions 1–16 of the questionnaire. Focus on […]
Summary and Descriptive Statistics
Using the data on the “National Cancer Institute Data” Excel spreadsheet, calculate the descriptive statistics indicated below for each of the Race/Ethnicity groups. Refer to your textbook and the […]
Statistics
Mary is planning a study to see if learning of 6th graders on a math lesson is affected by background noise level. She wants to use a t-test for […]
Statistics Analysis
Answer the questions below in your Microsoft Excel sheet or in a separate Microsoft® Word document: o Insert a new column in the database that corresponds to […]
Statistics
Let XI, , X.„ be a random sample taken from a Norma/(ps. a2) distribu-tion with some known a. The testing is done between Ho : p = po and […]
Statistics project
Conduct a survey then display and analyze the data using methods from Chapters 2 and 3 of your textbook. Use techniques of inferential statistics […]
Data summaries using pivot tables
Create 2 data summaries using pivot tables and pivot charts that provide insight into a problem or opportunity.
Appropriate sampling
Appropriate sampling is a critical component in developing a good research project. Using your approved research questions and research topic, explain your anticipated sampling method and why this is appropriate […]