Schaum's Outline of Elements of Statistics I: Descriptive by Ruth Bernstein, Stephen Bernstein

By Ruth Bernstein, Stephen Bernstein

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Schaum's Outline of Elements of Statistics I: Descriptive Statistics and Probability (Schaum's Outlines Series)

Tough attempt Questions? ignored Lectures? now not adequate Time?

Fortunately for you, there's Schaum's Outlines. greater than forty million scholars have depended on Schaum's to assist them reach the study room and on tests. Schaum's is the major to swifter studying and better grades in each topic. every one define provides the entire crucial path details in an easy-to-follow, topic-by-topic layout. you furthermore may get thousands of examples, solved difficulties, and perform routines to check your abilities.

This Schaum's define can provide
• perform issues of complete causes that strengthen wisdom • assurance of the main updated advancements on your direction box • In-depth evaluate of practices and functions
Fully appropriate together with your lecture room textual content, Schaum's highlights the entire vital evidence you must understand. Use Schaum's to shorten your learn time-and get your most sensible try out scores!

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Example text

SYSTEMATIC AND RANDOM ERRORS OF MEASUREMENT In Section 2 . 1 0 we indicated that all real-life continuous data only approximate the true measurements and are therefore called approximate measurements. One reason given for this was the sensitivity (or detection) limit for even the most powerful measuring instrument. Thus, no matter how many decimal places the instrument provides, it can only crudely approximate the infinite number of decimal places in the true measurement. Besides this sensitivity limit, another factor that separates any real-life measurement from its true value is error of measurement present in the real-life data.

An operational definition of a measurement indicates the exact sequence of steps (or operations) that are followed in taking a measurement: applying a measurement scale to an observable variable. The definition should be sufficiently precise and detailed so that everyone who uses the procedure will achieve essentially the same measurement. 1 You are asked to measure the height of each person in your statistics class to the nearest millimeter, using two meter sticks, masking tape, and a stepladder.

Ans. (a) 4,926. 19 195 sec to 0. 8001 mg? 0006000 mg, (b) 2 Indicate the implied range and the number of significant digits in the measurement 52,000 moths. Ans. 000047 mg? 0 kro, The implied range is 5 1 ,500 moths to 52,500 moths, and there are two significant digits. Indicate the implied range and the number of significant digits in the measurement 94,000 mi to the nearest 1 00. Ans. The implied range is 93,950 mi to 94,050 mi, and there are three significant digits. 0000 x 1 0 - 1 kg? Ans. 37 X 10- 1 kg.

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