Measurement

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Measurement Questions and Answers

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What is the level of measurements of the numbers 1, 1438, 66, and 413?
When was the imperial system invented?
The word part meaning hundred is. a. octo- b. penta- c. milli- d. centi-
What is the most accurate measurement of 1 pound?
X = The number of babies that will be born at the hospital by the end of the day today Y = The number of babies that will be born at the hospital between yesterday and today (inclusive) True or Fa...
Suppose we want to charge a flask with 1.9 g of sugar. We put the empty flask on a balance and it is determined to weigh 170 g. Enter the weight we would expect to see on the balance when we're don...
What is the meaning of the true value of a measurement?
Differentiate between the true value and the measured value of a measurement
Water begins flowing into a large tank that already has 11 gallons of water in it. 1. Which of the following statements defines a variable to represent the amount of water added to the tank? a. L...
What do you mean by the least count of an instrument?
Four students measure the mass of an object, each using a different scale. They record their results as follows: Student A, B, C, and D 0f Mass (g): 49.06g, 49 50g, 49.1g, and 49.061g. Which stude...
Is the wavelength of light computed from second order spectrum data more accurate than that from the first order spectrum? why?
What are the two main measuring systems?
What is gr in measurement?
What is a measurement ton?
During a mountain climbing trip it is observed that the water used to cook a meal boils at 90 degrees C rather that the standard 100 degrees C at sea level. At what altitude are the climbers prepar...
Convert kilometers per hour to meters per second.
A car speedometer has a 7% uncertainty. What is the range of possible speeds when it reads 120 km/h? 1. km/h (lowest) 2. km/h (highest)
How much depth would a lake lose per year if it uniformly covered an area of 80 square kilometers and supplied a local town with a population of 40,000 people? Consider only population uses, and ne...
A bird flies a distance of d = 150 plus or minus 3 m during a time t = 20.0 plus or minus 1.0 s. The average speed of the bird is v = d/t = 7.5 m/s. What is the uncertainty of v?
The mass of a baby's brain increases by an average of approximately 1.6 mg/min. a. How much would the baby's brain mass increase in one week? b. How long would it take for the brain's mass to incre...
A) A calibrated micrometer was used to take 10 replicated measures of a reference standard. If X bar = 0.073, and the true value of the reference standard is 0.075, what is the bias of the micromet...
In 2011 the U.S. Department of Transportation reported with 95% confidence that the average length of a motor vehicle trip in the United States was 9.72 miles with a margin of error of 0.22 miles....
SAT scores are distributed with a mean of 1,500 and a standard deviation of 300. Abigail is interested in estimating the average SAT score of first-year students at her college. If she would like...
Suppose that Daniel works for a city health agency and was asked to estimate the mean caffeine content per 5 ounces for a coffee shop. He finds that a random sample of 45 5-ounce servings has a mea...
Six measurements were made of the magnesium ion concentration (in parts per million, or ppm) in a city's municipal water supply, with the following results. It is reasonable to assume that the popu...
The width of a confidence interval will be: A. Narrower for 99% confidence than for 90% confidence. B. Wider for a sample size of 64 than for a sample size of 36. C. Wider for a 99% confidence than...
During a short interval of time the speed, v in m/s of an automobile is given by v = at^2 + bt^3, where the time t is in seconds. Using dimensional analysis, find the units of a and b respectively.
What is the level of measure for each of the following: a. Winners in pie eating contest. b. Salaries of people in our classroom. c. Colors of Skittles. d. Freezing temperatures on Celsius scale.
The speed of 74 randomly selected automobiles on Expressway 281 is measured. The 95% confidence interval of the mean speed is found to be from 58.5 mph to 65.5 mph. Which of the following is the be...
A sample contains years to maturity for 20 corporate bonds. The sample mean years to maturity for corporate bonds is 9.7. The sample standard deviation is 7.98. What is the margin of error?
A survey of 965 voters in one state reveals that 408 favor approval of an issue before the legislature. Construct the 90% confidence interval for the true proportion of all voters in the state who...
A research institute conducted clinical trials of a method designed to increase the probability of conceiving a boy. Among 174 babies born to parents using the method, 144 were boys. Identify the m...
When using midterm exam scores to predict a student's final grade in a class, the student would prefer to have an (a) negative residual, because that means the student's final grade is lower than w...
How many weighings of a balance scale are needed to find a lighter counterfeit coin among four coins? Describe an algorithm to find the lighter coin using this number of weighings.
Statistics professor Dr.Stat claimed his pulse rate at the peak of an exercise program was lower than the mean pulse rate of statistics students. Dr.Stat's pulse rate was measured to be 60.0 bpm. H...
What rule represents this function (0,1), (1,0.5), (2,0.25), (3,0.125), (4,0.0625)?
A ruler is divided into tenth of an inch. What fraction of an inch represents the greatest measurment error due to the ruler?
5 boxes of bananas sell for $30.00. How many boxes can you buy for $9.00?
Five boxes of bananas sell for $30.00. How many boxes can you buy for $9.00?
It costs $95 for 20 students to visit an aquarium. How much does it cost for 162 students?
Rainer bought 1.43 pounds of lunch meat at the store for $10.98. What was the unit rate (price) of the lunch meat?
Identify the level of measurement of each of the following variables: |a. The number of hours a student studies per week. |..... |b. Student IQ rating. |...... |c. Classification of students by...
The x and y coordinates of a moving particle are described by y = x^2. At what point on the parabola are the x and y coordinates changing at the same rate?
A certain force with units of measure mlt2 is given by the equation f=kml2t4, where m is a mass, l is a length, t is a time and k is a constant. What are units of the constant, k?
How do you convert between TB, GB and MB? What is the scale?
In the following situations, indicate whether you'd use the normal distribution, the t distribution, or neither. a. The population is normally distributed, and you know the population standard devi...
A leopard runs 125km per hour. Calculate how many meters per second the leopard is running. Show work and explain.
A simple random sample from a normal distribution is taken in order to obtain a 95 % confidence interval for the population mean. If the sample size is 8, the sample mean is 22, and the sample stan...
A survey of 180 motorists revealed that they were spending on average $287 per year on car maintenance, with a standard deviation of $94. Construct 95% and 99% confidence intervals. How would you v...
A random sample of n = 12 months of stock returns is taken and the sample variance of monthly returns (s^2) is found to be 16. Provide a 95 percent confidence interval for the estimate of the popul...
Compute the critical value z_{alpha/2} that corresponds to a 87% level of confidence.
The confidence interval at the 95% level of confidence for the true population proportion was reported to be (0.750, 0.950). Which of the following is a possible 90% confidence interval from the sa...
The compressive strength of concrete is being tested by a civil engineer who tests 12 specimens and obtains the following data: 2216 2237 2249 2204 2225 2301 2281 2263 2318 2255 2275 2295 For the...
For each example, determine whether the level of measurement is categorical or quantitative and why. A. Gender B. Age C. Political identity (Democrat, Republican, Green Party, Libertarian, etc.) D....
When constructing a confidence interval estimate of the population mean mu , explain how to decide between the Normal distribution and Student t-distribution? Explain the requirements for each dist...
The confidence interval with a higher confidence level is ____ than the confidence interval with lower confidence in the same problem. a. larger b. smaller.
The width of a confidence interval will be: (a) Narrower for 99% confidence than 95% confidence (b) Narrower for a sample size of 100 than for a sample size of 50 (c) Wider for 90% confidence than...
A study done by researchers at a university concluded that 65 % of all student athletes in a country have been subjected to some form of hazing. The study is based on responses from 1900 athletes....
What is the appropriate z_{alpha/ 2} value for a 77.8% confidence interval for mu?
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