# Statistics exercise 2 | Statistics homework help

**Assignment 7** **Statistics Exercise II**

These weekly exercises provide the opportunity for you to understand and apply statistical methods and analysis.

All assignments MUST be typed, double-spaced, in APA style and must be written at graduate level English, citing the text in APA format.

**#1. **Define “power” in relation to hypothesis testing.

**#2. ** Alpha (a) is used to measure the error for decisions concerning true null hypotheses. What is beta (ß) error used to measure?

**#3. ** In the following studies, state whether you would use a one-sample *t* test or a two-independent-sample *t* test.A study testing whether night-shift workers sleep the recommended 8 hours per dayA study measuring differences in attitudes about morality among Democrats and RepublicansAn experiment measuring differences in brain activity among rats placed on either a continuous or an intermittent reward schedule **Use SPSS and the provided data to answer the following questions. Round your answers to the nearest dollar, percentage point, or whole number.**

**#4. ** What is the Pearson *r* correlation between participants’ ages and the age of their partners (AGE1, AGE2)? A..000 B..413 C..622 D..822

**#5. ** What is the mean and standard deviation for the Lifestyle score (L)? A.31.22, 7.99 B.36.19, 8.54 C.30.03, 7.28 D.55, 13

**#6.** What is the regression equation that would best predict relationship happiness (HAPPY) from the Lifestyle (L) score? A.HAPPY = L – .143 B.HAPPY = .23L – 4.5 C.HAPPY = .42L + .23 D.HAPPY = 4.47 – .018L

**#7. ** The Lifestyle score (L) measures the degree to which a participant desires a luxurious lifestyle. The Dependency score (D) measures the degree to which a participant expects others to provide financial support. Compute the correlation between these two variables. Which of the statements below best describes the relationship?

A.People who want a more frugal lifestyle tend to be more financially dependent. B.People who want a more luxurious lifestyle tend to be more financially dependent. C.People who want a more luxurious lifestyle tend to be less financially dependent. D.There is no relationship between desired lifestyle and financial dependency.

**#8. ** The first case shown in the data file is a firefighter with a financial Risk-Taking score (R) of 38. What is his Risk-Taking z-score (hint: you will need to find the Risk-Taking mean and standard deviation)?

A.0.179 B.-0.223 C.1.342 D.-1.223**Assignment Outcomes:**

Assess the concepts underlying appropriate use of various research methodologies

Analyze how to recognize the inappropriate or deceptive use of research methodology

Compare/contrast the basic assumptions underlying various statistical operations Summarize the consequences of using various methodological approaches Differentiate between the appropriate and inappropriate application and interpretation of research methods and statistics