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measurements should be made precisely to ensure accuracy (:
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∙ 13y ago
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Why would there be different published values for the normal range of a particular measurement?
Different people or organizations may have made slightly different measurements. Measurements are never 100% accurate.
What does a line graph in which the data points do not fall along a straight line mean?
There are several possible answers: The line is actually meant to be a curved line and not a straight line. The relationship between the two variables is not a linear function. Discovering this can be one of the main reasons for drawing the graph. The data points are empirical measurements (from an experiment, for example) and there are errors associated with the observations. The errors may be systematic or random. You have made mistakes - either in recording the data or in plotting them.
When is data considered invalid?
Data is considered invalid when it is wrong or has changed. Data represents facts that are recorded, so any alterations made to it can make it invalid.
What trend can you see in the graph you made from the data table about the distance traveled by a car?
That question can only be answered by the person who made the graph from the data table, referred to as "you" in the question. Get busy!
Explain the different stages of planning a statistical survey?
Stages of Planning a statistical survey 1. Nature of the problem to be investigated should be clearly defined in an un-ambigous manner. 2. Objectives of investigation should be stated at the outset. Objectives could be to obtain certain estimates or to establish a theory or to verify a existing statement to find relationship between characteristics etc. 3. The scope of investigation has to be made clear. It refers to area to be covered, identification of units to be studied, nature of characteristics to be observed, accuracy of measurements, analytical methods, time, cost and other resources required. 4. Whether to use data collected from primary or secondary source should be determined in advance. 5. The organization of investigation is the final step in the process. It encompasses the determination of number of investigators required their traning, supervision work needed, funds required.
What do you call the results of an experiment?
Observations and measurements made during an experiment are called the data.
What should you do if your data are different from what you expected?
Conclude that you made a mistake in the way you collected the data
Which of the following describes a reason for making a prediction when doing a controlled experiment?
To indicate what specific results will support a hypothesis to anticipate the observations or measurements that will be made apex
What is telemtry?
Telemetry is the highly automated communications process by which measurements are made and other data collected at remote or inaccessible points and transmitted to receiving equipment for monitoring
In measurements made using a Q meter high impedance elements should preferably be connected in?
Delta connection
How many 16 gauge double barrel Essex firearms were made?
No data known- sorry. Essex has been gone for a long time, and there is not a very high collectors demand- which is what drives gathering info on production data, etc. Sorry-
What describes a reason for making a prediction when doing a controlled experiment?
To anticipate the observations or measurements that will be made is known as an HYPOTHESIS.
How was the discovery of the shape of the orbits of the planets made?
Careful and meticulous astronomical measurements by the astronomer Tycho Brahe followed by numerical analysis of that data by Johannes Kepler after Tycho's death.
What does experimental data mean?
"Experimental data" is data obtained from measurements made during an experiment; this is the working out of "expected" or "theoretical" data which would be calculated from ideal equations. Experimental and theoretical data may not match exactly due to errors in measurement (or other reasons). Examples: * Investigating the effect of acceleration due to gravity down a slope. 1) Set up a slope; 2) Put a "car" at the top of the slope with a ticker tape attached behind it going through a stylus that vibrates up and down ( thus marking the tape) at a constant frequency. 3) Letting the car run down the slope pulling the tape through the stylus; 4) Measure the distance between successive marks on the tape. These measurements are the experimental data. They can be made for different slopes which would give different measurements. * Investigating the effect of different weights on a spring 1) Hang a spring with a weight carrier from a stand 2) Measure the distance from the attachment of the spring to the bottom of the weight carrier 3) Add various (different) weights to the carrier and measure the distances. These measurements are the experimental data - in this case it is paired data as the distance relates to a given weight; here different springs would lead to different measurements.
What are measurements made in?
Measurements are made in units. The specific units that you would use depend upon what it is that you wish to measure. Practically anything can be measured.
Measurements made by hand are more accurate than those made by machine?
The measurements are almost always correct when made by machines. An example would be a calculator.
In what month were the measurements made for sea ice in the year 2008?
Measurements are made every day. The Arctic sea ice minimum occurs in September.
