Questions from Statistics Principles

Q: Simulate drawing 100 simple random samples of size n = 40 from

Simulate drawing 100 simple random samples of size n = 40 from a population whose proportion is 0.3. (a) Test the null hypothesis / each simulated sample. (b) If we test the hypothesis at the a = 0.1...

Q: A polling organization conducts a study to estimate the percentage of households

A polling organization conducts a study to estimate the percentage of households that speaks a foreign language as the primary language. It mails a questionnaire to 1023 randomly selected households t...

Q: Parapsychology (psi) is a field of study that deals with

Parapsychology (psi) is a field of study that deals with clairvoyance or precognition. Psi made its way back into the news when a professional, refereed journal published an article by Cornell psychol...

Q: Based on historical birthing records, the proportion of males born worldwide

Based on historical birthing records, the proportion of males born worldwide is 0.51. In other words, the commonly held belief that boys are just as likely as girls is false. Systematic lupus e...

Q: Yale University graduate student J. Kiley Hamlin conducted an experiment in

Yale University graduate student J. Kiley Hamlin conducted an experiment in which 16 ten-month-old babies were asked to watch a climber character attempt to ascend a hill. On two occasions, the baby w...

Q: Explain what a P-value is. What is the criterion

Explain what a P-value is. What is the criterion for rejecting the null hypothesis using the P-value approach?

Q: Suppose we are testing the hypothesis / versus / and we find

Suppose we are testing the hypothesis / versus / and we find the P-value to be 0.23. Explain what this means. Would you reject the null hypothesis? Why?

Q: Suppose we are testing the hypothesis / versus / and we find

Suppose we are testing the hypothesis / versus / and we find the P-value to be 0.02. Explain what this means. Would you reject the null hypothesis? Why?

Q: Discuss the advantages and disadvantages of using the Classical Approach to hypothesis

Discuss the advantages and disadvantages of using the Classical Approach to hypothesis testing. Discuss the advantages and disadvantages of using the P-value approach to hypothesis testing.

Q: The headline reporting the results of a poll conducted by the Gallup

The headline reporting the results of a poll conducted by the Gallup organization stated “Majority of Americans at Personal Best in the Morning.” The results indicated that a survey of 1100 Americans...