Assume an industrial psychologist has polled a group of adultson which characteristic of an automobile is most important to them, appearance, performance, or economy.Some of these adults have kids and some don't.The number people preferring each of these response categories is given below.

PREFERENCE

Appearance Performance Economy

__________________________________________________________

| | | |

Kids |_____ |_____ |_____ |

| 70 | 60 | 120 |

|_________________ |_________________ |_____________________|

| | | |

NoKids |_____ |_____ |_____ |

| 145 | 75 | 80 |

|_________________ |_________________ |_____________________|

Use the chi-square test for independence to test whether these variables are related at alpha = .05. You'll need to get all of theexpected values, and row and column totals.

48. About how many adults WITH kids were EXPECTED to endorse "ECONOMY" as their preferred characteristic?

109

120

80

200

91

50. What are the degrees of freedom for the test?

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