92283 (class 208, 209) Exercise Feb 25.14 I Class________ Class ID________ Name______________________ Histogram 13 batteries are tested, and the hours that each one lasts is recorded: 9, 12, 14, 10, 15, 10, 18, 23, 10, 14, 19, 25, 11, 1-1) Make a frequency table, using 4-hour class interval, which are: 8 -< 12, 12 -< 16, 16 -< 20, 20 -< 24, 24 -< 28 1-2) Make a histogram graph using the above frequency table 1-3) Based on the histogram, how many batters lasts less than 16 hours? ___________________ 1-4) Describe the overall shape of the distribution. Is it roughly symmetric, skewed to the right, or skewed to the left? 1-5) Is the or and a better brief summary for this ‘five number summary’ ‘the mean standard deviation’ distribution? State your choice and write down the parameters (no need calculate the value). 2-1) What is SRS stand for? _________________________________________________ 2-2) Medical experiments are often double-blind. This means that All individual data are kept confidential Neither the subject nor the doctor know which treatment the subject receives The subjects in the control group receive a placebo treatment
92283 (class 208, 209) Exercise I Feb 25.14 Class________ Class ID________ Name______________________ Histogram 13 batteries are tested, and the hours that each one lasts is recorded: 9, 12, 14, 10, 15, 10, 18, 23, 10, 14, 19, 25, 11, 1-1) Make a frequency table, using 4-hour class interval, which are: 8 -< 12, 12 -< 16, 16 -< 20, 20 -< 24, 24 -< 28 1-2) Make a histogram graph using the above frequency table 1-3) Based on the histogram, how many batters lasts less than 16 hours? ___________________ 1-4) Describe the overall shape of the distribution. Is it roughly symmetric, skewed to the right, or skewed to the left? 1-5) Is the ‘five number summary’ or ‘the mean and standard deviation’ a better brief summary for this distribution? State your choice and write down the parameters (no need calculate the value). 2-1) What is SRS stand for? _________________________________________________ 2-2) Medical experiments are often double-blind. This means that All individual data are kept confidential Neither the subject nor the doctor know which treatment the subject receives The subjects in the control group receive a placebo treatment
ExerISpr-14.docx