A random sample of 19 health maintenance organizations (HMOS) was selected. For each HMO, the co-payment (in dollars) for a doctor's office visit was recorded. The results are as follows. 8, 9, 9, 8, 7, 5, 6, 10, 7, 11, 12, 12, 10, 12, 8, 5, 5, 10, 9 Send data to calculator Send data to Excel Under the assumption that co-payment amounts are normally distributed, find a 90% confidence interval for the mean co-payment amount in dollars. Then find the lower limit and upper limit of the 90% confidence interval. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) Lower limit: || Upper limit:

given data: 2.1, 2.8, 3.7, 4.1, 4.6, 5.8, 6.3, 7.4, 8.2, 8.5, 9.6, 10.1, 10.3, 10.9, 11.0, 11.8, 12.4, 13.6, 13.9, 14.3, 14.6, 15.5, 15.9, 16.7, 16.9 Can someone help me with this series of questions please... 5a) Calculate the percentile of the data value 7.4.   b) What value represents the 65th percentile?   c) What does it mean for a data value to be in the 65th percentile?

Create a stem plot for the following 26 numbers: 1, 13, 28, 31, 32, 32, 37, 37, 37, 38, 39, 3, 53, 55, 58, 62, 62, 63, 65, 65, 65, 66

The following are the annual incomes (in thousands of dollars) for 24 randomly chosen, U.S. adults employed full-time. 28, 31, 32, 33, 34, 36, 38, 38, 38, 38, 41, 42, 43, 43, 44, 47, 48, 50, 54, 55, 61, 82, 96, 107 Send data to calculator Send data to Excel Frequency 15 10+ 15 6 5. 25 45 65 1 1 1 85 105 125 Annual income (in thousands of dollars) Answer the questions below. (a) For these data, which measures of central tendency take more than one value? Choose all that apply. Mean Median Mode ☐ None of these measures Mean (b) Suppose that the measurement 28 (the smallest measurement in the data set) were ☐ Median replaced by 10 Which measures of central