# statistics

Faculty in the psychology department at APUS consume an average of 5 cups of coffee per day with a standard deviation of 1.5. The distribution is normal. How many cups of coffee would an individual at the 25th percentile drink per day?

A. 4

B. 5

C. 6

D. 7

1. 👍 0
2. 👎 0
3. 👁 199
1. Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion (.25) related to a Z score. Insert the values into the above equation and solve for the score.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Statistiscs

Students in the psychology department consume an average of 5 cups of coffee per day with a standard deviation of 1.75 cups. The number of cups of coffee consumed is normally distributed. • What proportion of students consume an

asked by StudentD on August 28, 2012
2. ### Research and Statistics

5. The table below shows Psychology exam scores, Statistics Exam scores, and IQ scores for a random sample of students. What can you observe in the relationship between IQ and psychology, psychology and statistics, and IQ and

asked by Moreen on September 11, 2010
3. ### Statistics: Percentile Rank

A survey of college students was conducted during final exam week to assess the number of cups of coffee consumed each day. The mean number of cups was 5 with a standard deviation of 1.5 cups. The distribution was normal. A. What

asked by Joy Chapman on October 18, 2011
4. ### stats

A random sample of 40 men drank an average of 20 cups of coffee per week during examination final, with the population standard deviation equal to 6 cups. A lower limit of an approximate 95% confidence interval the population

asked by cindy on March 31, 2010
5. ### biostatistics

among coffee drinkers, men drink a mean of 3.2 cups per day with a standard deviation of 0.8 cups. Assume the number of coffee drinks per day follows a normal distribution. a. What proportion drinks 2 cups per day or more? b. What

asked by natasha on November 4, 2011
1. ### math

the typical American coffee drinker consumes an average of 3.1 cups per day. A sample of 12 senior citizens reveled they consumed the following amounts, reported in cups, of coffee yesterday. 3.1 3.3 3.5 2.6 2.6 4.3 4.4 3.8 3.1

asked by Anonymous on June 5, 2010
2. ### Maths

A coffee urn holds 12 litres when full. Harry fills coffee cups from the urn until the coffee runs out. A)How many 140mls cups of coffee can be filled from the urn? B)At the end there is not enough coffee left to fill a cup, Harry

asked by Anonymous on February 24, 2011
3. ### maths

A coffee urn holds 12 litres when full. Harry fills coffee cups from the urn until the coffee runs out. A)How many 140ml cups of coffee can be filled from the urn? B)At the end there is not enough coffee left to fill a cup, Harry

asked by Anonymous on February 24, 2011
4. ### statistics

A survey of college students was conducted during final exam week to assess the number of cups of coffee consumed each day. The mean number of cups was 5 with a standard deviation of 1.5 cups. The distribution was normal. a. What

asked by Scott on October 20, 2011
5. ### algebra

A coffee shop sells small cups of coffee and large cups of coffee. A small cup of coffee costs \$2. A large cup of coffee costs \$3. On Tuesday, the store sold a total of 155 cups of coffee for a total of \$335. How many small cups

asked by anna on May 7, 2013

More Similar Questions