# Question

What proportion of a normal distribution is located between each of the following z-score boundaries?

a. z = -0.25 and z = +0.25

b. z = -0.67 and z = +0.67

c. z = -1.20 and z = +1.20

a. z = -0.25 and z = +0.25

b. z = -0.67 and z = +0.67

c. z = -1.20 and z = +1.20

## Answer to relevant Questions

Find each of the following probabilities for a normal distribution. A random sample is obtained from a normal population with a mean of µ = 95 and a standard deviation of σ = 40. The sample mean is µ = 86. a. Is this a representative sample mean or an extreme value for a sample of n = 16 ...At the end of the spring semester, the Dean of Students sent a survey to the entire freshman class. One question asked the students how much weight they had gained or lost since the beginning of the school year. The average ...For a population with a standard deviation of σ = 20, how large a sample is necessary to have a standard error that is: a. less than or equal to = points? b. less than or equal to 2 points? c. less than or equal to 1 point? Montarello and Martens (2005) found that fifth-grade students completed more mathematics problems correctly when simple problems were mixed in with their regular math assignments. To further explore this phenomenon, suppose ...Post your question

0