The frequency measures the number of times an event occurs in a data set.

learn more… | top users | synonyms

0
votes
0answers
8 views

mean of a frequency distribution [on hold]

he manager of a bank recorded the amount of time each customer spent waiting in line during peak business hours one Monday. The frequency distribution below summarizes the results. Find the mean ...
1
vote
2answers
51 views

Comparing frequencies

I'm trying to find the right test to use to compare 3 frequencies. Basically, in my research, 3 separate user interface prototypes were given to the same sample (10 people) and particular tasks needed ...
0
votes
0answers
22 views

Differing frequencies for time series ts() function in R

I understand the frequency argument of the ts function in R is set to work for monthly, quarterly, yearly data, etc. In my case, ...
0
votes
0answers
15 views

Quantifying 1 factor count data with variable # of categories

I feel like this should be an easy question, but after lots of looking I"m stumped. I deal with continuous data almost exclusively, but in my infinite wisdom I designed this study that yielded ...
0
votes
0answers
19 views

Term importance from document with predefined weight

I am having a set of document with different value weight on them. I am trying to understand which term from the documents trigger the highest values. I have a theory on how to do it and I would like ...
0
votes
1answer
30 views

Which test? Chi-square, non-parametric or Poisson Regression..? What species is the most frequently observed

I'm reposting my question based on previous comments received. The problem: 10 x 100m sections of shoreline have been sampled to determine if one species is the most frequently observed species ...
0
votes
0answers
41 views

Is the frequency of one observation greater than the frequency of others

Suppose I have 10 bags of M&M's. I count the number of red, blue, green and brown M&M's in each bag. I want to know if there are more red M&M's than other M&M's in the bags and if this ...
0
votes
0answers
13 views

Frequency change monthly series

I have a monthly series and I want to make it quarterly. I want to know which method I use. I used an arithmetic average but I do not trust these results. There is a procedure in Stata and Eviews I ...
1
vote
0answers
13 views

Differences in variables constructed by counting.

I have constructed a frequency variable from counting events of certain magnitude (e.g, 1,2,3...) from a time dependent experiment with animals. I have two groups (Trained vs Control) and two phases ...
0
votes
0answers
14 views

Frequency analysis from time dependent data in R

I've got a time dependent data from animal recording. My data has two groups (TR and UT) each group has 20 replicate. Tiempo (time) variable goes from 282 sec to 318 sec. I have a turning point at 300 ...
1
vote
1answer
35 views

Calculating Mean and Standard Deviation From Frequency Chart

I have only a frequency table like that below. How can I get the mean and standard deviation? ...
1
vote
1answer
43 views

How to get corpus used for word-frequencies for languages other than english?

I have taken a corpus of English for finding the word frequency in giving recommendation for spelling mistakes. I just used simple : Edit Distance between ...
0
votes
0answers
28 views

Best statistical analysis method for frequency data

I'm designing a between subjects experiment with 1 dependent variable with 2 levels (manipulation & Control) and 4 dependent variables which are all categorical (Yes/No). I would like to see the ...
0
votes
0answers
22 views

Suggested algorithms for time series analysis of sporadic events

I have a series of sporadic, discrete time series events that appear to occur in shorter interval clusters and I am looking for a way to determine the frequencies at which the events occur. None of ...
7
votes
2answers
144 views

Frequency jump detection

It is generally known that 'jumps' in frequency data are difficult to estimate. In the current literature, many different techniques for estimating such jumps have been tested and often with ...
1
vote
0answers
73 views

What do you think is the right tooling to separate sub-time series from a single big time series?

I would like to separate a big time series into its components to improve forecasting. To clarify: I would like to find the different components - maybe it is better to say frequencies which ...
3
votes
2answers
111 views

Comparison of frequency rates

Patients with chronic schizophrenia will take some antipsychotic drug during some period of time. The frequency of schizophrenia for each patient will be recorded before and after that period. I ...
4
votes
4answers
144 views

Econometric Model and deciding the frequency of data collection

I am looking to build an econometric model and I am wondering if using annual data vs monthly or quarterly data is going to produce a less accurate model. If the dependent variable is affected by ...
0
votes
0answers
13 views

How to investigate higher frequency oscillation from lower frequency observations?

I have a set of data, e.g. chilled water flow rate, from a sensor reading, which record the value every half an hour. However, it yields irregular high-low pattern which bothers me quite much. Until ...
0
votes
1answer
36 views

Word-frequency and statistics

I am new to statistics and am wondering how I can apply it in linguistics. There is a conjunction in a corpus that 902 times (.91) conjoins sub-clausal units, and 91 (.09) times clausal units. How ...
0
votes
1answer
45 views

How to compare multiple frequency distributions with some zeroes?

I have a data frame with frequencies for the teacher profession descriptors as it is perceived by 1st year, 2nd year and MA students. Some of this frequencies are zeroes. What statistical method can I ...
1
vote
1answer
49 views

Variation on the urn problem and frequency distribution

I have $6$ machines each producing different coloured balls. The balls are mixed together in a large vessel. Groups of $6$ balls are extracted at random for packing. Each pack will therefore have a ...
1
vote
0answers
58 views

To BIN or not to BIN a continuous data to get a Fragment Size Distribution ?

I have a data set in excel of almost 6000 entries (quantitative and continuous => P(X=x)=0, I mean the possible values for my continuous random variable X are uncountably many). Each point will ...
0
votes
0answers
40 views

Comparing Frequency Distributions with non-categorical data

Rather than try and contrive things, I'll just give you the data as is. This similar to the ideas found here. I have two population from a control group and a disease infected group. I want to ...
2
votes
1answer
30 views

How to compare groups with different sizes?

I need to calculate the winner of a PTA membership contest for our local elementary school. There are 15 classes of different sizes (size based on number of students in the class). We need to see ...
0
votes
1answer
32 views

Principled way of combining time series with different spans and granularity into an econometric model

I want to forecast the price of something given various time series as inputs. The problem is that they are of different frequency (annual, quarterly, monthly, daily) and time periods (the more ...
1
vote
2answers
98 views

Compare differences in dependent frequencies

I would like to compare two error rates (proportion of incorrect answers in questions with dichotomous response-format) for two different items, and I am looking for some advice on how to do that. ...
0
votes
0answers
8 views

Counting how many times some query parameters occur together

My web site logs which criteria was given by each search query. A typical line in this log file looks like x=foo&y=bar&z=baz, which means the user provided ...
1
vote
0answers
5 views

OOV “frequency”

I'm writing an algorithm to split twitter hashtags into their component words. I'm splitting the tags into all possible substrings, and then looking up each substring's frequency in a dictionary. I ...
0
votes
0answers
38 views

Time series: What is my natural time period?

We are modeling univariate ts with R. Sampled daily since 1-1-2013 at five observations per week. We are unclear about how to decide 'natural time period'. Until now we just assumed 260 weekdays in ...
1
vote
0answers
44 views

Standard Deviation and Variance

Can someone help me with this question because I'm not sure of how to do it exactly: There are two routes for a worker to get to his office. Both the routes involve hold ups due to traffic ...
0
votes
1answer
44 views

Frequency distribution and number of samples

Suppose I have a frequency distribution of some process of f_n(x) that is based on n samples, with ...
0
votes
0answers
64 views

Data structure for Inverse Cumulative Distribution when columns are *NOT* separate variables

I am trying to structure data to conduct a Frequency analysis and output an Inverse Cumulative Distribution histogram for a biomechanics study. The goal is to compare 4 devices with respect to their ...
0
votes
0answers
23 views

Mean in Cumulative frequencies distribution

Monthly expense Cumulative Freq. up to 50 7 up to 80 25 up to 120 49 up to 200 58 over 200 60 Calculate ...
1
vote
1answer
50 views

Probability distribution, unfair coin

An unfair coin which has 0.35 probability to result head is tossed four times. Build and represent graphically the probability distribution and the cumulative ...
0
votes
1answer
237 views

Variance and asymmetry on relative frequency class distribution

I don't know how to resolve this (easy) exercise. I've calculated the first output. But I don't know if it's correct. Calculate arithmetic mean, variance (standard deviation^2), concentration and ...
0
votes
1answer
22 views

What test(s) can I use to compare 4 percentages for both pre- and post-treatment conditions?

Have 4 groups of results from 4 different treatments. Want to compare pre- and post treatment within groups and between groups
0
votes
1answer
81 views

How to test for correlation between frequency of an event and the stock market

I am currently running an event study, for which I need to find out if my events are clustered and/or if their frequency is tied to the stock market. Creating a scatter plot of the event dates and the ...
1
vote
1answer
71 views

Difference in frequencies in two groups of unequal size

I want to compare the frequency of retweets between 2 groups of unequal size. I've got the total tweet count and the retweet count for each user. I was hoping the R Cookbook webpage would help but the ...
5
votes
1answer
78 views

Most significantly frequent category

I am measuring the frequency of consonants in a sample lexicon of a language. The results are as follows: ...
0
votes
2answers
219 views

Excel: which products are most frequently ordered together? (clustering question)

I'd like to recruit your help in coming up with an Excel-based method to analyse a set of raw ordering data where each item is on its own row. So, in the data below, order 111 contains two part ...
1
vote
1answer
244 views

What are the chances of something *not* occurring?

Suppose I'm gambling using a strategy of doubling my bet whenever I lose to recoup my losses from previous bets. If my initial bet is 1/2048 of my capital, I can bet 10 times before I run out of ...
0
votes
0answers
29 views

Testing if a difference between two frequencies is different from zero

I have been trying to find the best way to test if the difference between two frequencies is significantly different from zero I have the following data: ...
0
votes
1answer
101 views

I have an easy Text mining frequency question

I have a very simple question. I am doing a simple frequency analysis where I am looking at two documents and comparing the frequency of the top used words in each document. I want to do a comparison ...
2
votes
1answer
305 views

How to compare frequency distributions

I have one categorical variable that can assume 5 possible values: 1, 2, 3, 4, 5. I observe the value of the variable in two samples of different size. Now I want to compare the frequency distribution ...
1
vote
0answers
80 views

Chi-square on a categorical variables (derived from continuous distribution)

We know that Chi-Square can be used with categorical data (such as Male/Female, Republican/Democrat, etc). However, I convert my original continuous data to ...
0
votes
0answers
111 views

How Can I predict the frequency of buying of a product

I'm trying to predict the frequency of buying a product based on their previous purchasing history. The approach I took as of now is, Create a vector by finding the duration distance of each ...
1
vote
0answers
38 views

statistical comparison of power spectrums over all frequencies

So I have N=147 control time-series signals and N=134 treatment (THC) signals. I want to compare if there are any significant differences in frequency power in the two groups. The top part of the ...
1
vote
0answers
27 views

How to check if a group is similar to another, in two different classifications

Suppose I have two different classification, e.g. C R s1 c1 r2 s2 c1 r2 s3 c3 r2 ... Where sn are the classified samples and the columns of the ...
1
vote
0answers
26 views

Question about the frequency definition of probability

In the book, it is written that the relative frequency or the frequency ratio gradually tends to become more or less constant as N becomes larger and larger. It is also mentioned that this is an ...