4.4.2

| ACTIVITY TON | a Finding probabilities associated with a -distribution. The United States Census Bureau determined that the mean number of children in an American household is 1.86. Polls of 15 households were conducted in a certain city. 1) What is the number of degrees of freedom? \"e = Show answer 2) A poll of 15 households had a sample mean of 3.26 children and a sample standard deviation of 2.12 children. What is the t-statistic? Type as: At ae = Show answer 3) What is the probability of finding 15 households with a sample mean of 3.26 children or less? Type as: #t## ve C7 Show answer 4) A different poll of 15 households had a sample mean of 2.72 children and a sample standard deviation of 2.12 children. What is the - statistic? Type as: #.aHt ee Ea Show answer 5) What is the probability of finding 15 households with a sample mean between 2.72 and 3.26 children and a standard deviation of 2.12? Type as: #.3t ee Ea Show answer U Feedback