Author: Anonymous

The above boxplot describes the square footage of one bedroom apartments that were rented over the past 12 months.  Answer the following: a.  Approximately what percentage of one bedroom apartments rented in the past 12 months were less than 1700 square feet? [answer1] b.  Approximately what percentage of one bedroom apartments rented in the past 12 months were between 1200 and 1600 square feet? [answer2] c.  What is the cutoff for the lowest 25% of square footages of one bedroom apartments? [answer3] d.  What is the approximate interquartile range? [answer4]

Identify if the following variables are Continuous or Discrete 1. The number of times a person has been married? [answer1] 2. The high temperature today. [answer2]

If the [answer1] is larger than [answer2] then shape of the distribution is right skewed (also called positive skewed)

Use the diagram below to answer the questions below. Boxplot of the lifetime (hours) of piece of machinery for two different manufactures.  a.  What is the interquartile range for Manufacturer A. [answer1] b. Which manufacturer has a lower median value? [answer2] c. Which manufacturer has more variation in their hours? [answer3] d. What percentage of the hours falls above 3500 hours for Manufacturer B? [answer4]  

A study in which the researcher knows which subjects got a treatment but the subjects do not know who got the treatment is called a blind, double blind or placebo effect?

The weight of a human heart is adults males has a bell-shaped distribution with a mean of 300 grams and a standard deviation of 35 grams.  Use the empirical rule to determine the following.  Write your answers in full sentences and use the appropriate units. a.   About 68% of adult male human hearts will weigh between what weights?  b.   What percentage of human hearts weigh less than 230 grams? c. What percentage of human hearts weigh between 230 grams and 405 grams?  

According to Chebyshev’s Theorem what percentage of the data set is NOT within 2 standard deviations of the mean?

The following frequency table is the  monthly rent  (in dollars) for an apartment is an small city. Rent Frequency $500-799 3 $800-1099 7 $1100-1399 10 $1400-1699 12 $1700-1999 8 Answer the following using the above table. Include the appropriate units and round your answer to 2 decimal places. a.   How many apartment rents are in table?  Assuming each apartment only has one rent.  [answer1] b.  How many apartments had a monthly rent less than $1100? [answer3] c.  What is the approximate mean rent? [answer4] d.  What is the approximate standard deviation of the rent? [answer5] e.  What percentage of rents were greater than or equal to $1400? [answer6]

The above boxplot describes the square footage of one bedroom apartments that were rented over the past 12 months.  Answer the following: a.  Approximately what percentage of one bedroom apartments rented in the past 12 months were more than 1700 square feet? [answer1] b.  Approximately what percentage of one bedroom apartments rented in the past 12 months were between 1200 and 1700 square feet? [answer2] c.  What is the median for the square footage of one bedroom apartments? [answer3] d.  What is the approximate interquartile range? [answer4]

Are the following observational study or an experiment? a.  A teacher divides their class into 2 groups, one groups does traditional homework with pen and paper and the other group does their homework on-line. A the end of the term the grades of the two groups are compares.?   [answer1] b.   A medical researcher obtains a sample do adults who have diabetes.  She polls all of them to determine how their lifestyle impacts with their diabetes. [answer2]