# The amount of coffee that people drink per day is normally distributed with a mean of 17 ounces and a standard deviation of 7 ounces. 35 randomly selected people are surveyed. Round all answers to 4 decimal places where possible. Find the IQR for the average of 35 coffee drinkers.Q1 =  ouncesQ3 =  ouncesIQR:  ouncesCan you show the process on a ti84

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The amount of coffee that people drink per day is normally distributed with a mean of 17 ounces and a standard deviation of 7 ounces. 35 randomly selected people are surveyed. Round all answers to 4 decimal places where possible.

Find the IQR for the average of 35 coffee drinkers.
Q1 =  ounces
Q3 =  ounces
IQR:  ounces

Can you show the process on a ti84

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Step 1

The standard deviation for 35 people is,

σ/ √n=7/ √35=1.1832

Q1 is the 25th percentile and Q3 is the 75th percentile.

The value of Q1 is 16.2019, which is obtained by using below steps

• Press 2nd VARS
• Select invNorm(
• Enter
• Type (0.25,17,1.1832)
• Enter

Output obtained by Ti 83 calculator is given below:

Step 2

The value of Q2 is 17.7981, which is obtained by using below steps

• Press 2nd VARS
• Select invNorm(
• Enter
• Type (0.75,17,1.1832)...

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