Chapter 3.1

Blood pressure values

Compare blood pressure results and mean and median for the diastolic pressure are both lower than the mean in the median for the systolic pressure

Measure of center

A measure of center is a value at the center or middle of a data set. There are several different ways to determine the center, so there are different definitions of measures of center, including the mean, median, mode, and mid range.

Celebrity net worth in millions

Apart from the fact that all other celebrities have amounts of net worth lower than those given, nothing meaningful can be known about the population

Best buy TVs

Are the resulting statistics representative a population of all TVs that are 60 inches or larger? the sample consist of the best buy TVs, so it is not a random sample and is not likely to be representative of the population

Percision of celebrities net worth

Based on the nature of the amounts, what can be inferred about their Percision ...the values all end in zero or five, so they are here to be rounded estimates.

Blood pressure what else would be better to analyze the data

Because the data are matched, it would make more sense to investigate whether there is an association or correlation between the two blood pressure's

Descriptive statistics

Descriptive statistics and methods and tools that summarize or describe relevant characteristics of data

Round off rules

For the mean median a mid range, carry one more decimal place that is present in the original set of values. For the mode, leave the value as is without rounding because values of the mode are the same as some of the original data values.

Relevant statistic regarding TVs

If you decide to buy one of these TVs, what statistic is most relevant, other than the measures of central tendency? The lowest price is a relevant statistic for someone planning to buy one of the TVs.

Inferential statistics

Inferential statistics make inferences, or generalizations, about populations

Blood pressure, measures of center the best Statistic?

Since this is Systolic and diastolic blood pressure is measured different characteristics, a comparison of the measures of center doesn't make sense.

Jersey numbers mean median mode in mid range

The jersey numbers are nominal data and they do not measure or count anything, so the resulting statistics are meaningless

Security company answers

The mean and the median for the security company are both lower than the mean and the median for the collections performed by other companies. Since the security company appears to have collected lower revenue than the other companies there is some evidence of stealing by the security companies employees.

Mean

The mean or arithmetic mean is generally the most important of all numeric measures used to describe data in is what most people call in average

Pulse rate for male and female

The median and the mean for males are both lower than the mean and median for females. The pulse rates for females appear to be higher than the pulse rates for males.

Median

The median of a data set is the measure of a center that is the middle value when the original data values are arranged in order from increasing or decreasing magnitude

Mid range

The mid range of a data set is the measure of center that is the value midway between the maximum and minimum values in the original data set. It is found by adding the maximum data value to the minimum data value and then dividing the sum by 2 Midrange =max data+min data/2

Mode

The mode of a data set is the value that occurs with the greatest frequency. It isn't used much with quantitative data, but it's the only measure of center that can be used with qualitative data, consisting of names, labels, or categories only

Average

The term average is not used in statistics the term mean should be used for the results obtained by adding all of the sample values and dividing by the total number of sample values

Measures of central tendency

Usually defined as mean median mode