IQ scores have a mean of 100 and a standard deviation of 15. What percentile corresponds to an IQ score of 115? Explain the steps you took to find the percentile.

Assignment Question

File needed for this homework:

  • https://calsouthern.instructure.com/courses/29957/files/588379?wrap=1

Activity Descriiption Statistics Exercise I: Descriptive statistics.

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

#1 Given the following values of the mean and median, state the likely shape of the distribution:

  • (a) mean = 4, median = 4 _______________
  • (b) mean = 12, median = 2 _______________
  • (c) mean = 8, median = 18 _______________
  • (d) mean = 6, median = 14 _______________
  • (e) mean = 10, median = 3 _______________
  • (f) mean = 8, median = 8 _______________

#2. IQ scores have a mean of 100 and a standard deviation of 15. What percentile corresponds to an IQ score of 115? Explain the steps you took to find the percentile.

#3. Which measure of central tendency would you use for the following variables (mean, median or mode). Explain your choice. Gender: _______________________________________________________ Class rank at a college: __________________________________________________ Age of high school students: ________________________________________ A skewed income distribution (90% with incomes under $150K; a few with incomes of several million): ____________________________________________________ Use SPSS and the data file found in syllabus resources (DATA540.SAV) to answer the following questions. Round your answers to the nearest dollar, percentage point, or whole number.

#4. What is the mean annual income (INC1) of the participants? $43,282 $72,133 $47,113 $34,282

#5. What percent of the participants are married (RELAT)? 28% 33% 51% 59%

#6. What is the modal level of relationship happiness (HAPPY)? Mixed Happy Very Happy Cannot be determined

#7. What is the median income of the participants’ partners (INC2)? $24,212 $28,945 $32,000 $48,975

#8. What percent of the participants are age 51 or older? 4% 5% 7% 10% Activity Outcomes Examine the basic assumptions underlying statistical operations Demonstrate the ability to analyze data

Last Completed Projects

topic title academic level Writer delivered