Questions from Applied Statistics

Q: To protect baby scallops and ensure the survival of the species,

To protect baby scallops and ensure the survival of the species, the U.S. Fisheries and Wildlife Service requires that an average scallop must weigh at least 1/36 pound. The harbormaster at a Massachu...

Q: A university wanted to survey alumni about their interest in lifelong learning

A university wanted to survey alumni about their interest in lifelong learning classes. They mailed questionnaires to a random sample of 600 alumni from their database of over 30,000 recent graduates....

Q: A marketing research group wanted to collect information from existing and potential

A marketing research group wanted to collect information from existing and potential customers on the appeal of a new product. They sent out surveys to a random sample of 1,200 people from their datab...

Q: Households can sign up for a telemarketing “no-call list

Households can sign up for a telemarketing “no-call list.” How might households who sign up differ from those who don’t? What biases might this create for telemarketers promoting (a) fi nancial planni...

Q: (a) Make an Excel scatter plot of X 5 1990

(a) Make an Excel scatter plot of X 5 1990 assault rate per 100,000 population and Y 5 2004 assault rate per 100,000 population for the 50 U.S. states. (b) Use Excel’s =CORREL function to find the cor...

Q: (a) Make an Excel scatter plot of X 5 airspeed

(a) Make an Excel scatter plot of X 5 airspeed (nautical miles per hour) and Y 5 cockpit noise level (decibels) for 61 aircraft flights. (b) Use Excel’s =CORREL function to find the correlation coeffi...

Q: (a) Which of these two displays (table or graph

(a) Which of these two displays (table or graph) is more helpful in describing the salad sales by Noodles & Company? Why? (b) Write a one-sentence summary of the data. (Source: Noodles & Compa...

Q: A study of 40 U.S. cardiac care centers showed

A study of 40 U.S. cardiac care centers showed the following ratios of nurses to beds. (a) Prepare a dot plot. (b) Prepare a frequency distribution and histogram (you may either specify the bins yours...

Q: Download the full data set of measurements of cockpit noise level for

Download the full data set of measurements of cockpit noise level for a commercial jet airliner from the McGraw-Hill Connect® website (only six data values are shown). (a) Use Excel to make...

Q: The first Rose Bowl (football) was played in 1902.

The first Rose Bowl (football) was played in 1902. The next was not played until 1916, but a Rose Bowl has been played every year since then. The margin of victory in each of the 95 Rose Bowls from 19...