A study of the ability of individuals to walk in a straight line reported the accompanying data on cadence (strides per second) for a sample of n = 20 randomly selected healthy men. 0.93 0.85 0.92 0.95 0.93 0.86 1.00 0.92 0.85 0.81 0.78 0.93 0.93 1.02 0.93 1.06 1.06 0.96 0.81 0.98 Assume the population distribution of cadence is approximately normal. A descriptive summary of the data is as follows: Variable cadence Variable cadence N 20 Mean 0.9240 Min 0.7800 Median 0.9300 Max 1.0600 St Dev 0.0792 01 0.8550 Q3 0.9700 (a) Calculate and interpret a 95% confidence interval for population mean cadence. (Round your answers to four decimal places.) strides per second Interpret this interval. O With 95% confidence, the value of the true mean cadence of all such men falls within the confidence interval. O The probability the true mean cadence is within this interval is 0.95. With 95% confidence, the value of the true mean cadence of all such men falls above the confidence interval. O With 95% confidence, the value of the true mean cadence of all such men falls below the confidence interval.

The histogram of the number of hours of sleep Stat 100 students reported getting each night roughly follows the normal curve with an average of 7.0 hours and a SD of 1.2 hours. a. Approximately 68% of the students sleep between hours and hot (Put the smaller number first) 提交答案|Tries 0/5 b. Approximately 95% of the students sleep between hours and hours. (Put the smaller number first) 提交答案| Tries 0/5 c. If a student sleeps 5.2 hours per night what percent of the people sleep more than her? Do the problem in steps: I. First, find the Z score = 提交答案|Tries 0/3 ii. Now, move the red vertical line on the following graph to the correct Z score by clicking and dragging the mouse. If you are using a touch screen, touch and then slide the region around the vertical line 1.00 Shade the region representing the percent of people who sleep more than her: Shade the region under the normal curve to the O left of the red vertical line O right of the red vertical line

Find the indicated IQ score. The graph to the right depicts IQ scores of​ adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15.

Answer the question in the second photo with the data provided in the first photo