Describe in your own words (with examples) cross sectional data?
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OK, cross-sectional data...\n\nMeasuring the width of an obese lady's belly, and comparing it as a ratio of the girth of her thigh.
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You could try describing it here.
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Descriptive Statistics do no intend to "fit" a distribution on the data or to predict new observations given the data.\nInstead, it pretends to "describe" the data in terms of its central tendency measures (mean, median, etc.) as well as dispersion statistics (variance,  rank, inter-quartile rank, etc.), bias statistics, etc.\nSummaries like histograms are also a good example of descriptive statistics.
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google sex partner graph studies, or sex partner statistics, then with the info make your own graph if there isnt one already
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do your own homework...
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Descriptive...Statistics that are based on entire populations\n\nInferential....Statistics that are base on samples from a population\nCharacteristics about the whole population are inferred from the samples\n\nI think this is right.
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Used to set insurance premiums, the probability of getting into accidents based on your car type/age\n\nFor evaluating worker performance, ie you're on time 95% of the time or only 80%\n\nHow can you actually tell when two sets of data are different? Need statistics.\n\n A lot of jobs in stats!!
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Instead of trying to explain it in text,\nI made a little file as an example.\nTry downloading this file.\nGood luck!
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This website defines primary and secondary data:\nhttp://members.tripod.com/~mccurtain_2/genietips/tip15.html\nI hope this helps.
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The Trend Analysis module allows you to plot aggregated response data over time. This is especially valuable, if you are conducting a long running survey and would like to measure differences in perception and responses over time.\n\nThe following data points can be measured (Y-Axis)\n\n   1. Mean and Mean Percentile\n   2. Standard Deviation and Variance\n\nThe "Time Factor" (X-Axis) can have the following granularity\n\n   1. Daily\n   2. Weekly\n   3. Monthly\n   4. Quarterly (Jan-Mar, Apr-Jun, Jul-Sept, Oct-Dec)\n   5. Yearly
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do your own homework....you have a computer.....should be easy
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I believe this means, first of all, to write up the statistics in kind of an essay (textual) rather than tabular format. In other words, describe what the data in the statistics represents, give the all-around total numbers, and then using the demographic information-age, sex, ethnicity, socio-economic status-whatever you have, break down the numbers from the totals showing how they relate to and between the demographic sub-groups.
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do your own homework please.
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Time series data is data taken at different, usually equally spaced, times.  The Dow Jones Average for one year is a time series.\n\nCross sectional or longitudinal data is taken at one time.  The prices of stocks at the close of the day today is cross sectional data.
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do your own homework!
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what type of statistics?
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try this site below, it is pretty descriptive.