According to a poll, 85% of California adults (428 out of 506 surveyed) feel that education is one of the top issues facing California. We wish to construct a 90% confidence Interval for the true proportion of California adults who feel that education is one of the top issues facing California. Find a 90% confidence interval for the population proportion, (Round your answers to three decimal places) *) Additional Materials Book Submit Answer The mean age of De Anza College students in a previous term was 26.6 years old. An instructor thinks the mean age for online students is older than 26.6. She randomly surveys 99 online students and finds that the sample meanis 29.7 with a standard deviation of 2.1. Conduct a hypothesis test at the level Note: If you are using a Student's t-distribution for the problem, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though) Parta) Part () Parte) Purt (d Part() O Partin Part ol Parthi Part 9 Construct a 95% confidence interval for the true mean. Sketch the graph of the situation Label the point estimate and the lower and upper bounds of the confidence interval (Round your answers to two decimal places) 95% CI: 29.7 X Enter a number A survey in the N.Y. Times Almanac finds the mean commute time (one way) is 25.4 minutes for the 15 largest US cities. The chamber of commerce in a cty feels that the commute time is less and wants to publicize this fact. The mean for 25 randomly selected commuters is 22.4 minutes with a standard deviation of 5 minutes. At the 0.10 level, is the city's commute significantly less than the mean commute time for the 15 largest US cities? Note: If you are using a Student's e-distribution for the problem, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.) Parta) Part) State the p-value. (Round your answer to four decimal places) Enter a number Part (0)