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Author Archives: Anonymous

What is the point estimate for Pcoffee – Pnon-coffee, the di…

What is the point estimate for Pcoffee – Pnon-coffee, the difference in the true proportions of coffee drinkers and non-coffee drinkers who frequently have trouble sleeping? Round to two decimal places. 

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This first section all refers to various section of Strunk a…

This first section all refers to various section of Strunk and White 2020.

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Often misused words:  The following sentence is correctly wr…

Often misused words:  The following sentence is correctly written.  In regard to your invitation, I would love to attend and bring a guest.  The phrase “In regard to” above is often misused/miswritten; please type that incorrect usage below (3 words).

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Correctly recast this poorly-written sentence. The fact is t…

Correctly recast this poorly-written sentence. The fact is that this exam is less difficult than I expected.

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Sally was running late – please select the sentence below th…

Sally was running late – please select the sentence below that is punctuated correctly around the quotation marks.  

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Suppose we are helping to perform a significance test for ea…

Suppose we are helping to perform a significance test for each of the following situations.  State the null hypothesis Ho and the alternative hypothesis H1 in each case.  NOTE 1: Do not attempt to perform any statistical test.NOTE 2: Clearly indicate the two groups. Educational psychologists are interested in identifying characteristics that affect academic performance at a residential college. One variable investigated in their study was car ownership. It was hypothesized that car owners at residential colleges will have a lower grade-point average.

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Using question 5, state the decision (reject the null & conc…

Using question 5, state the decision (reject the null & conclude the alternative, or do not reject the null) at the alpha level of 0.05. Be sure to state WHY.

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Using question 34, state the decision (reject the null & con…

Using question 34, state the decision (reject the null & conclude the alternative, or do not reject the null) at the alpha level of 0.01. Be sure to state WHY.

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What is the critical value that was used to create this 95%…

What is the critical value that was used to create this 95% confidence interval? 

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Less and fewer are often misused.  Distinguish between them…

Less and fewer are often misused.  Distinguish between them by explanation of correct use and example.  

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