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An important component of the cost of living is the amount of money spent on housing. Housing costs include rent (for tenants), mortgage payments and property tax (for home owners), heating, electricity, and water. An economist undertook a 5-year study to determine how housing costs have changed. Five years ago, he took a random sample of 200 households and recorded the percentage of total income spent on housing. This year, he took another sample of 200 households. Conduct a test (with α=.10 ) to determine whether the economist can infer that housing cost as a percentage of total income has increased over the last 5 years.
Talk to a family with a child under 13 at home. Interview both the parents and the child, but interview the child separately. Determine the influence of each family member on a fast-food restaurant for the child's use. In addition, determine what method(s) of conflict resolution is (are) used.
A committee of 10 is to be chosen from 50 people, 25 of whom are Republicans and 25 Democrats. The committee is chosen at random. a. What is the probability that there will be five Republicans and five Democrats?
b. What is the probability that a majority of the committee will be Republicans?