Find the stansard deviation of the data summerized in the given frequency distribution.  The test scores of 40 students are summerized in the frequency distribution below. Find the standard deviation. Score Students 50-59 6 60-69 6 70-79 5 80-89 6 90-99 17

Find Mean and Standard Deviation (Use standard deviation formula). Data Set ((-16, 0, 16, 15, 25))

The table below gives the annual income for eight families, in thousands of dollars. Find the number of standard deviations family E’s income is from the mean. Family A B C D E F G H Income 51 53 52 50 49 50 47 48 How many standard deviations is family E’s income is from the mean? (Round to three decimal places as needed)

Today, all boats in the Harbor Tour Fishing Company caught a total of six salmon with weights as follows in pounds: 16, 23, 18, 31, 14, and 19. Calculate the mean (show the appropriate formula) the median (use the median location formula; interpret the medial weight) and the mode. Is the mean here a statistic or parameter? Explain

The ages​ (in years) of a random sample of shoppers at a gaming store are shown. Determine the​ range, mean,​ variance, and standard deviation of the sample data set. 12, 20, 23, 13, 18, 17, 22, 17, 15, 16 The range is The mean is ( Simplify your answer. Round to the nearest tenth as​ needed.) The variance is (Simplify your answer. Round to the nearest hundredth as​ needed.) The standard deviation is (Simplify your answer. Round to the nearest tenth as​ needed.) Can you please explain me this math problem having trouble understanding. Thank you.

find the z score that corresponds to P35, P65, P20, P55, P67, and P25. Draw the normal curve and state your calculator demands.

Every year, the students at a school are given a musical aptitude test that rates them from 0 (no musical aptitude) to 5 (high musical aptitude). This year's results are given in the frequency distribution:   Aptitude Score 0 1 2 3 4 5 Frequency 1 6 4 1 5 2   Calculate the sample standard deviation of this data. Answer using two decimal places.

The distribution of the number of hours that a random sample of people spend doing chores per week is shown in the pie chart. Use 32 as the midpoint for "30+ hours." Make a frequency distribution for the data. Then use the table to estimate the sample mean and the sample standard deviation of the data set. Click the icon to view the pie chart. First construct the frequency distribution. Class Frequency, f 0-4 5-9 10-14 15-19 20-24 25-29 30+ Find an approximation for the sample mean. X= (Type an integer or decimal rounded to the nearest tenth as needed.) Find an approximation for the sample standard deviation. S= (Type an integer or decimal rounded to the nearest tenth as needed.) Weekly Chore Hours 0-4 hours (3 people) 5-9 hours (14 people) 10-14 hours (21 people) 15-19 hours (18 people) 20-24 hours (17 people) 25-29 hours (11 people) 30+ hours (7 people) - X -

Find the standard deviation (rounded to the nearest unit) for the data indicated.   Test Score              Frequency 90   1         80   4         70   7         60   6         50   3

find the mean, median, and range of the set of numbers. Then, use Excel to create a frequency table and a histogram of the test scores. Make sure to label your tables and graphs appropriately A researcher is studying reaction times in mice. The reaction times in milliseconds (ms) for thirty mice are shown below.   66 384 539 578 166 741 874 384 221 178 176 675 275 15 845 397 271 655 681 702 63   823 364 194 755 744 557 776 69 857