Investigation 1: Deviation from the Mean
... everything correctly so far, the sum should be zero. The capital Greek letter , called sigma, is a symbol that is used to indicate the sum. Step 5: Square each deviation to make it positive and record these values in the last column of the table. The first value is done for you. Step 6: Find the su ...
... everything correctly so far, the sum should be zero. The capital Greek letter , called sigma, is a symbol that is used to indicate the sum. Step 5: Square each deviation to make it positive and record these values in the last column of the table. The first value is done for you. Step 6: Find the su ...
Ch. 5-6 Review Exercises 1. Prenatal care. Results of a 1996
... care is important for pregnant women. The mortality rate is quite a bit lower for women with adequate care than for other women, but there may be a lurking variable. c) Intensive care is given for emergency conditions. The data do not suggest that the care is the cause of the higher mortality. 2. If ...
... care is important for pregnant women. The mortality rate is quite a bit lower for women with adequate care than for other women, but there may be a lurking variable. c) Intensive care is given for emergency conditions. The data do not suggest that the care is the cause of the higher mortality. 2. If ...
Research Methods lecture 6 and 7 Slides
... 2. Estimate the likely size of difference between groups, if the hypothesis is correct 3. Decide how confident you want to be that the difference(s) you observe is unlikely due to chance 4. Decide how much you want to risk missing a true difference (i.e. what power you want the study to have) Note: ...
... 2. Estimate the likely size of difference between groups, if the hypothesis is correct 3. Decide how confident you want to be that the difference(s) you observe is unlikely due to chance 4. Decide how much you want to risk missing a true difference (i.e. what power you want the study to have) Note: ...
3.1 Measures of Central Tendency
... Measures of central tendency try to get a measure of all the data into a single number, the central value (mean, median, mode), without regard for how spread-out (consistent) the data is. To more completely describe sets of data we need a numerical measure of how spread-out data is - these measures ...
... Measures of central tendency try to get a measure of all the data into a single number, the central value (mean, median, mode), without regard for how spread-out (consistent) the data is. To more completely describe sets of data we need a numerical measure of how spread-out data is - these measures ...
Measures of Central Tendency
... Examples: A company believes that on the average a bottle of pills contains 50 pills. Five bottles are selected at random and the pills are counted; 50, 48, 50, 50, 52 Is the average 50 ? _______ Describe the deviation of each bottle ( # of pills in each bottle) and then find an average of this devi ...
... Examples: A company believes that on the average a bottle of pills contains 50 pills. Five bottles are selected at random and the pills are counted; 50, 48, 50, 50, 52 Is the average 50 ? _______ Describe the deviation of each bottle ( # of pills in each bottle) and then find an average of this devi ...