ACTUAL QUESTIONS AND CORRECTLY
WELL DEFINED ANSWERS LATEST 2024 –
2025 ALREADY GRADED A+
statistical power - ANSWERS-probability of correctly rejecting a null hypothesis
that is false- measured on scale of 0-1
factors that effect statistical power - ANSWERS--sample size (larger sample larger
the power)
-size of the treatment effect
-Alpha level
-one or two tailed test
-significance level
-type of hypothesis test
99.7 % of values - ANSWERS-fall with in 3 standard deviations of he mean
normal curve defined by - ANSWERS-mean and standard deviation
, raw score - ANSWERS-exact value that is observed
standard score - ANSWERS-indicates exactly how many standard deviations a raw
score is above or below the mean. Z-score
normal distribution - ANSWERS-a frequency distribution that is shaped like a
symmetrical bell, unimodal curve
total relative frequency of distribution - ANSWERS-area under curve = 100% of the
data or 1.0
68% of values - ANSWERS-% fall within 1 standard deviation of mean
95% of values - ANSWERS-% fall within 2 standard deviations of mean
What is the purpose of calculating z-scores? - ANSWERS-The purpose of
calculating z-scores is to understand a score's relative standing within a
distribution. The z-score standardizes scores from different data sets with
different means
formula for raw score to z-score - ANSWERS-
formula for z-score to raw score - ANSWERS-