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Chapter 11: Q.27 (page 656)

df=-----

Short Answer

Expert verified

The degree of freedomdf=8.

Step by step solution

01

Given Information

Given data:

Traveling DistanceThird classSecond classFirst classTotal1-100miles2114641101-200miles1816842201-300miles16171548301-400miles12.00%142147401-500miles661022Total736760200

02

Explanation

The number of columns is 3and the number of rows is 5

df=(number of column-1)路(number of row-1)

=(3-1)(5-1)

=2路4

=8

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Most popular questions from this chapter

A factory manager needs to understand how many products are defective versus how many are produced. The number of expected defects is listed in Table 11.5.

Number producedNumber defective0-1005101-2006201-3007301-4008401-50010

A random sample was taken to determine the actual number of defects. Table 11.6 shows the results of the survey.

Number producedNumber defective0-1005101-2007201-3008301-4009401-50011

State the null and alternative hypotheses needed to conduct a goodness-of-fit test, and state the degrees of freedom.

Use a solution sheet to solve the hypothesis test problem. Go to Appendix E for the chi-square solution sheet. Round expected frequency to two decimal places College students may be interested in whether or not their majors have any effect on starting-salaries after graduation. Suppose that 300recent graduates were surveyed as to their majors in college and their starting salaries after graduation. Table 11.45shows the data. Conduct a test of independence.

Major<\(50,000
\)50,000-\(68,999\)69,000+
English5
205
Engineering10
3060
Nursing10
1515
Business10
20
30
Psychology20
3020

Table11.45

According to an avid aquarist, the average number of fish in a 20-gallon tank is 10, with a standard deviation of two. His friend, also an aquarist, does not believe that the standard deviation is two. She counts the number of fish in 15other 20-gallon tanks. Based on the results that follow, do you think that the standard deviation is different from two? Data:11;10;9;10;10;11;11;10;12;9;7;9;11;10;11

Some travel agents claim that honeymoon hot spots vary according to the age of the bride. Suppose that 280recent brides were interviewed as to where they spent their honeymoons. The information is given in Table 11.46. Conduct a test of independence

Location20-2930-3940-4950and over
Niagara Falls15252520
Poconos15252510
Europe1025155
Virgin Islands2025155

The owner of a baseball team is interested in the relationship between player salaries and team winning percentage. He takes a random sample of 100 players from different organizations.
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