# Statistics

A coffee-dispensing machine is supposed to deliver 12 ounces of liquid into a large paper cup, but the costumer believes that the actual amount is less. As a test he plans to obtain a sample of 30 cups of the dispensed liquid. The mean of his sample is 11.5 ounces. The machine operates with a known standard deviation of σ = 1.1 ounces. Is there enough evidence at the α = .05 level for him to claim the machine is broken?

1. 👍 0
2. 👎 0
3. 👁 344
1. Z = (mean-mean)/SEm

SEm = SD/sqrt n

Use table in back of text labeled area under normal distribution.

1. 👍 0
2. 👎 0
posted by PsyDAG
2. jnkljm

1. 👍 0
2. 👎 0
posted by jul;

## Similar Questions

1. ### stats

1. Conduct a hypothesis test for the following scenario. SHOW ALL YOUR WORK THE WAY WE DID IN CLASS! A coffee-dispensing machine is supposed to deliver 12 ounces of liquid into a large paper cup, but the costumer believes that the

asked by Anonymous on May 10, 2016
2. ### MATHS STATISTICS

B. A soft-drink vending machine is supposed to pour 8 ounces of the drink into a paper cup. However, the actual amount poured into a cup varies. The amount poured into a cup follows a normal distribution with a mean that can be

asked by DON on May 13, 2013
3. ### Descriptive Statistics

A vending machine dispenses coffee into a twelve ounce cup. The amount of coffee dispensed into the cup is normally distributed with a standard deviation of 0.04 ounces. You can allow the cup to overfill 10% of the time. What

asked by Herbert on May 9, 2011
4. ### statistics

A vending machine dispenses coffee into a sixteen ounce cup. The amount of coffee dispensed into the cup is normally distributed with a standard deviation of 0.03 ounces. You can allow the cup to overfill 10% of the time. What

asked by dj on May 25, 2011
5. ### statistics

5. A soft drink dispensing machine uses paper cups that hold a maximum of 12 ounces. The machine is set to dispense a mean of 10 ounces of the drink. The amount that is actually dispensed varies. It is normally distributed with a

asked by Sarah on September 15, 2014
6. ### statistics

A vending machine company wants to check three of its machines to determine if they are properly dispensing 12 ounces of coffee. Their data is given below. Reference: Ref 11-4 Compute the test value for the coffee machines. Answer

asked by Nicole on May 9, 2014
7. ### math

The busy Mother pours herself a coffee into a paper cup before making her way to the amusement park. The coffee temperature is 35 C when the cup is placed on the kitchen counter. The Mother needs to tend to her son and her coffee

asked by emily on April 6, 2018
8. ### statistics

The amount of corn chips dispensed into a 16-ounce bag by the dispensing machine has been identified at possessing a normal distribution with a mean of 16.5 ounces and a standard deviation of 0.1 ounce. Suppose 400 bags of chips

asked by UG on November 8, 2011