he speeds of vehicles traveling on a highway are normally distributed with an unknown population mean and standard deviation. Arandom sample of 11 vehicles is taken and results in a sample mean of 65 miles per hour and sample standard deviation of 9 miles per hour.

dft0.10t0.05t0.025t0.01t0.005..................91.3831.8332.2622.8213.250101.3721.8122.2282.7643.169111.3631.7962.2012.7183.106121.3561.7822.1792.6813.055131.3501.7712.1602.6503.012

Find a 90% confidence interval estimate for the population mean using the Student's t-distribution.

• Round the final answers to two decimal places.