Psychology data test

• Qualitative data is descriptions of the characteristics of what is being studied
• Quantitative data is data that can be measured, counted, or calculated.
• Error bars indicate the amount of uncertainty in the measurement of the value of the variable.


  Idk
• Mean is the sum of all the values in a set divided by the number of values in the set.
• Median is the middle value in a set of data. 


  To find the Median you must arrange the data points from smallest to largest and find the middle data point
• The mode is the number in a set that occurs the most frequently
• Nominal Data is data that is in the form of numbers, such as age, height, weight, and income.
• Ordinal data is data that can be ranked in order, such as age, income, and weight.
• Interval data is data that is measured on a scale in which each point is placed at equal distance from one another
• Ratio data is Quantitative data with an equal and definitive ratio between each data and absolute “zero” being treated as a point of origin.
• The Confidence interval is the range of values that is 95% likely to contain the population parameter.
• The Interquartile range is the difference between the first and third quartiles.
• To get the interquartile range, you must:

  • Put the numbers in order
  • Find the Median
  • Place parentheses around the numbers before and after the median
  • Find the median of both Parentheses (Q1 and Q2)
  • Subtract Q1 from Q2
• How to Deduce Variability:

  • Calculate the mean
  • Subtract the mean from each score to get deviation score
  • Square each deviation score
  • Add up squared deviation score
  • Divide the sum by the number of scores