According to the U.S. Census Bureau, 1 1% of children in the United States lived with at least one grandparent in 2009 {USA TODAY, June 30. 2011). Suppose that in a recent sample of 1550 children. 246 were found to be living with at least one grandparent. At a 2.5% signicance level. can you conclude that the proportion of all children in the United States who currently live with at least one grandparent is higher than 11%? Use both the p-value and the critical-value approaches. Round your answers for the observed value of z and the critival value of z to two decimal places, and the p-value to four decimal places. zobserved = n p-value = a Critical value = n We can conclude that the proportion of all children in the US. who currently live with at least one grandparent is l v' 11%. eTextbooka higher than l . less than or equalto . According to an estimate, the average price of homes in Martha's Vineyard, Massachusetts, was $650,000 in 2011 (USA TODAY, August 11, 2011). A recent random sample of 70 homes from Martha's Vineyard showed that their average price is $680,000 with a standard deviation of $100,000. Using a 2% significance level, can you conclude that the current average price of homes in Martha's Vineyard is different from $650,000? Use both the p-value and critical-value approaches. Use the p-value approach. Use the t distribution table to find a range for the p-value. Enter the exact values for the range.