level of measurement n sign test

Question 1

nominal data

Answer 1

• level of measurement where the data r in separate categories
• Discrete data
• Gives no information about the individual, it will only tell you how many r in each category
• eg type of movie-horror, drama etc. can be classified in categories w/out any specific order/ranking. doesnt have a numerical value associated w it
• eg hair colour

Question 2

ordinal data

Answer 2

• Ordinal data involves ordering or ranking variables
• eg, in terms of higher and lower
• It can be subjective such as ratings on a self-report measure
• It doesnt say anything about the distance between positions in the order
• eg evaluations of service received at a restaurant. responses can be ranked/ ordered based on their quality, indicating a clear hierarchy. but, intervals between categories= not equal, n theres no true zero point.
• eg size of popcorn

Question 3

interval data

Answer 3

• Interval numbers are in order n the intervals or gaps between them are of equal sizes
• There is no absolute zero point, only a convenient zero
• eg calendar years- equal values between values n no true zero
• eg temperature

Question 4

not needed?????

ratio data

Answer 4

• measure along a numerical scale that has equal distances between adjacent values n true zero

Question 5

the sign test

Answer 5

• done when study is looking for a difference n design is related eg repeated measures
• normally conducted when data is nominal but may be interval ordinal

Question 6

steps of a sign test

Answer 6

• decide if theres been an increase, decrease or response/score=same
• add up pulses n minuses to work out the calculated/observed value which=least frequent sign
• Compare the calculated/ observed value to the critical value using Table 5. N is the number of participants, but any responses that are the same are ignore
  1. v
  2. calculating ur s value
  3. hypothesis
  4. compare in critical values table