# Question

Refer to the previous exercise.

a. Find the z -score corresponding to the lower quartile (Q1) of a normal distribution.

b. Find and interpret the lower quartile and upper quartile of the MDI.

c. Find the inter-quartile range (IQR) of MDI scores.

d. Section 2.5 defined an observation to be a potential outlier if it is more than 1.5 × IQR below Q1 or above Q3. Find the intervals of MDI scores that would be considered potential outliers.

a. Find the z -score corresponding to the lower quartile (Q1) of a normal distribution.

b. Find and interpret the lower quartile and upper quartile of the MDI.

c. Find the inter-quartile range (IQR) of MDI scores.

d. Section 2.5 defined an observation to be a potential outlier if it is more than 1.5 × IQR below Q1 or above Q3. Find the intervals of MDI scores that would be considered potential outliers.

## Answer to relevant Questions

In 2008, the murder rates (per 100,000 residents) for the 50 states and the District of Columbia (D.C.) had a mean of 5.39 and a standard deviation of 4.434 (Statistical Abstract of the United States).8 a. D.C. had a murder ...Jane Doe claims to possess extrasensory perception (ESP). She says she can guess more often than not the outcome of a flip of a balanced coin in another room. In an experiment, a coin is flipped three times. If she does not ...An instructor always assigns final grades such that 20% are A, 40% are B, 30% are C, and 10% are D. The grade point scores are 4 for A, 3 for B, 2 for C, and 1 for D. a. Specify the probability distribution for the grade ...For the following random variables, explain why at least one condition needed to use the binomial distribution is unlikely to be satisfied. a. X = number of people in a family of size 4 who go to church on a given Sunday, ...a. Find the z -score for the number that is less than only 1% of the values of a normal distribution. Sketch a graph to show where this value is. b. Find the z -scores corresponding to the (i) 90th and (ii) 99th percentiles ...Post your question

0