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SECONDARY
ALGEBRA
PRE-ALGEBRA
MEASUREMENT
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Pre-Algebra: measurement problems solved
Recent questions in Measurement
Measurement
asked 2021-04-25
A log 10 m long is cut at 1 meter intervals and itscross-sectional areas A (at a distance x from theend of the log) are listed in the table. Use the Midpoint Rule withn = 5 to estimate the volume of the log. (in
\(\displaystyle{m}^{{{3}}}\)
)
Show transcribed image text A log 10 m long is cut at 1 meter intervals and itscross-sectional areas A (at a distance x from theend of the log) are listed in the table. Use the Midpoint Rule withn = 5 to estimate the volume of the log. (in
\(\displaystyle{m}^{{{3}}}\)
)
Measurement
asked 2021-03-07
Find the outcome of:
10ft1(3/8)i n-7ft8(7/16)i n
Measurement
asked 2021-03-06
Standard deviation is an indication of the...
a. precision of one measurement
b. accuracy of one measurement.
c. precision of repeated measurements.
Measurement
asked 2021-03-04
Determine the level of measurement of the variable.
Favorite color
Choose the correct level of measurement.
A) Interval
B) Nominal
C) Ratio
D) Ordinal
Measurement
asked 2021-02-27
An airplane needs to reach a velocity of 203.0 km/h to takeoff. On a 2000 m runway, what is the minimum accelerationnecessary for the plane to take flight?
a) 0.79 m/s2
b) 1.0 m/s2
c) 0.95 m/s2
d) 0.87 m/s2
Measurement
asked 2021-02-26
Juan makes a measurement in a chemistry laboratory and records the result in his lab report. The standard deviation of students lab measurements is o= 8 milligrams. Juan repeats the measurement 2 times and records the mean x of his 2 measurements. What is the standard deviation of Juan's mean result?
Measurement
asked 2021-02-26
What is the relationship between the accuracy and uncertainty of a measurement?
Measurement
asked 2021-02-21
A measurement using a ruler marked in centimeters is reported as 6 cm. What is the range of values for the actual measurement?
Measurement
asked 2021-02-14
Suppose that the current measurements in a strip of wire are assumed to follow a normal distribution with a mean of 10 milliamperes and a standard deviation of 2 milliamperes.
What is the probability that a measurement exceeds 13 milliamperes? What is the probability that a current measurement is between 9 and 11 milliamperes.
Measurement
asked 2021-02-13
1.After several tries of measuring, Lydia gets the results of 2.75, 2.76, 2.30 cm. She realized that the results of measurement is closest to the actual measurement which is 3.25. What is the implication of her measurements? Is it Accurate and precise?
2.I measured the length of cabinet 3 times. The results of my measurements are 3.44 m, 3.55 m, 3.47 m. Afterwards, I compared it to the results with each other. What did I was trying to find out? Is it precision?
Measurement
asked 2021-02-12
An ore loader moves 1200 tons/h from a mine to the surface. Convert this rate to lb/s, using 1 ton 2000 lb.
Measurement
asked 2021-02-12
Two independent measurements are made of the lifetime of a charmed strange meson. Each measurement has a standard deviation of
\(7\times 10^{−15}\)
seconds. The lifetime of the meson is estimated by averaging the two measurements.
What is the standard deviation of this estimate ?
Measurement
asked 2021-02-10
A water tower can hold 52,000 liters of water. It currently contains 13,000 liters and is being filled with 90 liters per minute. How many hours are remaining for it to get filled?
Measurement
asked 2021-02-09
Give the correct choices of these multiple choice questions in questions (a) and (b) and explain your choices (for example: why quantitative and not qualitative? Why neither and not discrete or continuous? Why ratio and not nominal, ordinal, or interval?
a.Question: Birth years of your family? Are these data quantitative or qualitative? Are these data discrete, continuous, or neither? What is the highest level of measurement of birth years? (Nominal, Ordinal, Interval, or Ratio?)
b.Question: Survey responses to the question “what is the gender of your first child?” Are these data quantitative or qualitative? Are these data discrete, continuous, or neither? What is the highest level of measurement associated with the gender measurements? (Nominal, Ordinal, Interval, or Ratio?)
Measurement
asked 2021-02-08
What can you say about the accuracy of your measurements?
What can you say about the precision of your measurements?
(Measure the longest dimension of the room twice, using two different techniques. Do the measurement in feet and inches. Then convert to meters.) Below is what I got.
\(Tape Measure - 146 inches > 3.7084 meters / 12 feet and 2 inches = 12.1667 feet > 3.70840 meters\)
\(Ruler - 144.5 inches (144 + 1/2) = 3.6703 meters / 12.0416 feet = 3.67027 meters\)
Measurement
asked 2021-02-05
Twenty-one independent measurements were taken of the hardness (on the Rockwell C scale) of HSLA-100 steel base metal, and another 21 independent measurements were made of the hardness of a weld produced on this base metal.
The standard deviation of the measurements made on the base metal was 3.06, and the standard deviation of the measurements made on the weld was 1.41.
Assume that the measurements are independent random samples from normal populations.
Need to conclude that measurements made on the base metal are more variable than measurements made on the weld?
Measurement
asked 2021-02-04
A certain scale has an uncertainty of 3 g and a bias of 2 g.
a) A single measurement is made on this scale. What are the bias and uncertainty in this measurement?
b) Four independent measurements are made on this scale. What are the bias and uncertainty in the average of these measurements? c) Four hundred independent measurements are made on this scale. What are the bias and uncertainty in the average of these measurements?
d) As more measurements are made, does the uncertainty get smaller, get larger, or stay the same?
e) As more measurements are made, does the bias get smaller, get larger, or stay the same?
Measurement
asked 2021-01-31
A certain scale has an uncertainty of 3 g and a bias of 2 g. a) A single measurement is made on this scale. What are the bias and uncertainty in this measurement? b) Four independent measurements are made on this scale. What are the bias and uncertainty in the average of these measurements? c) Four hundred independent measurements are made on this scale. What are the bias and uncertainty in the average of these measurements? d) As more measurements are made, does the uncertainty get smaller, get larger, or stay the same? e) As more measurements are made, does the bias get smaller, get larger, or stay the same?
Measurement
asked 2021-01-22
What are quantitative data measurements?
A. Measurements that are appropriate for any type of variable
B. Measurements of categorical variables and can be displayed as types or descriptions
C. Measurements that are appropriate in all experiments
D. Measurements of numerical variables and are displayed as numerical values
Measurement
asked 2021-01-13
Loretta, who turns eighty this year, has just learned about blood pressure problems in the elderly and is interested in how her blood pressure compares to those of her peers. Specifically, she is interested in her systolic blood pressure, which can be problematic among the elderly. She has uncovered an article in a scientific journal that reports that the mean systolic blood pressure measurement for women over seventy-five is 133.0 mmHg, with a standard deviation of 5.1 mmHg.
Assume that the article reported correct information. Complete the following statements about the distribution of systolic blood pressure measurements for women over seventy-five.
a) According to Chebyshev's theorem, at least
\(?36\% 56\% 75\% 84\%\ or\ 89\%\)
of the measurements lie between 122.8 mmHg and 143.2 mmHg.
b) According to Chebyshev's theorem, at least
\(8/9 (about\ 89\%)\)
of the measurements lie between mmHg and mmHg. (Round your answer to 1 decimal place.)
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