Lesson 1378 of 1524
Hypothesis Testing with Two Samples
The domain of the random variable (RV) is not necessarily a numerical set; the domain may be expressed in words; for example, if X = hair color, then the domain is {black, blond, gray, green, orange}
Practice this chapterThe domain of the random variable (RV) is not necessarily a numerical set; the domain may be expressed in words; for example, if X = hair color, then the domain is {black, blond, gray, green, orange} We can tell what specific value x of the random variable X takes only after performing the experiment
standard deviation — a number that is equal to the square root of the variance and measures how far data values are from their mean; notation: s for sample standard deviation and σ for population…. variable (random variable) — a characteristic of interest in a population being studied. Common notation for variables are uppercase Latin letters X , Y , Z ,... Common notation for a specific value from the…. pooled proportion — estimate of the common value of p 1 and p 2.
Worked example
What does “standard deviation” mean in Hypothesis Testing with Two Samples?
- 1Use the wording this chapter gives for standard deviation.
- 2The book says: a number that is equal to the square root of the variance and measures how far data values are from their mean; notation: s for sample standard deviation and σ for population….
- 3Do not use the meaning of variable (random variable). That term means a characteristic of interest in a population being studied. Common notation for variables are uppercase Latin letters X , Y , Z ,... Common notation for a specific value from the….
Result: a number that is equal to the square root of the variance and measures how far data values are from their mean; notation: s for sample standard deviation and σ for population…
Why. That is the meaning this chapter gives for standard deviation.
Do not swap standard deviation and variable (random variable). standard deviation means a number that is equal to the square root of the variance and measures how far data values are from their mean; notation: s for sample standard deviation and σ for population…. variable (random variable) means a characteristic of interest in a population being studied. Common notation for variables are uppercase Latin letters X , Y , Z ,... Common notation for a specific value from the….
Practice margin
This chapter
A fresh set from this chapter only. Choose 10 or 20. Multiple choice and fill-in, with no repeat inside the set.