Classify each of the narratives below based on whether the mean or median provides a better description of the center of its distribution:
1. Age of professional basketball players
2. Household income in the united states
3. Height of professional basketball players
4. Hours at work in the...
I am running a metaanalysis about the age of girls and boys at the beginning of puberty (Tanner-stages) and it would be great if someone could help me out with two questions about significance tests for mean/median value differences.
In SPSS I have the data of the...
I would be deeply grateful if you could help me with a simple question I have!!!
From what I have read about Mann Whitney U, it is crucial for the reporting of the results to know whether your two distributions (i.e., the distribution of scores for both groups of the...
I'm currently writing my thesis, and I have to do non-parametric tests. I know that I have to report the medians in text. However, I'm doing graphs. Just wanted to ask whether anyone knows if I report the 95% CI and the medians in the graphs? When i do this it looks super weird and...
I'm quite new to SPSS and am looking to code my data records by whether or not they are within 1 standard deviation of the median for that variable.
So far I have been doing this for each variable:
DO IF (HumanIL21Normalised GE -1.6336 AND HumanIL21Normalised LE 0.3664).
Hi, I've done a survey with an 11 point Likert scale (-5 to +5, with 0).There are 30 questions total in the survey, with ~800 responses.
I have graphed the median response for each survey question, but I am looking for a way to test which questions are 'significantly' different from 0 (a...
I am trying to generate a variable of the median of 5 ordinal rank variable. 1 =disagree to 5=agree. I try to use egen varsmedian= median(var1 var2 var3 var4 var5)
but it didnt work. Any thoughts?
Thank you in advance
Greetings great minded statisticians!
I have an issue categorizing my continuous variable. I have put a continuous variable with a negative skew, into three categories. I am using logistic regression and I want to see if my three variables of omega-3 fatty acids will reduce the risk of being...
I started a Statistics class a few weeks ago and i'm still pretty lost. Could someone explain to me how I should resolve this following problem ? Please.
On the math SAT taken in 1994, the average score for men was 500 and the average score
for women was 460. The histograms for...
I noticed that in the following articles data distribution is tested via checking for >10% difference in mean and median.
However, when I follow the...
Attached is the graph with my data:
I have 4 distributions of particles of different sizes. For each one of them, a particle size frequency distribution has been measured three times. Median, mean and mode were calculated for each frequency distribution and averaged for each of the four...
I have a question regarding testing a median against a hypothesized value.
On a five-point Likert-style scale (1=regressed; 5 = met goal ), student participants were asked to rate the extent to which a target (fictional person) met daily protein intake goals from as compared to a previous...
If you have a sample of 36 numbers (and some of these numbers are repeated more than once), how do you find the median, upper quartile, and lower quartile of the sample?
Also when drawing a box plot, do you disregard when a number is shown more than once and just put it down once in the plot...
I have some quesitons on Likert scale. I have 9 statements in 1 questionnaire (scale of 1 to 6).
My questions are:
1) I want to display teh result in bar chart...so I have to use median , is it? or do i need to use mean? am i right?
2) If i want to compare two groups (girls and...
Hi! Can you help me with this:
we have X=(X1, X2, ... Xn) - iid, Xi ~ N(m,1), I need to prove that distribution of med(X)-X(j) is the same as distribution of X(n-j+1)-med(X), where med(X) is a sample median and X(j) is j-th order statistic.
so in my minor thesis, i compare 2 groups (deaf and normal children; n1=n2=15) in their forward and backward digit span scores and word-list memory task (wlmt) scores (there are 4 scores: 1st, 2nd,and 3rd trial, and the mean scores of all three trial).
in the normality tests, distribution is...