Question: For Data Set 2C, what is the approximate standard deviation?
a. √1.8
b. 1.1
c. 1.4
d. 2
e. √1.7
Answer: e. √1.7
Question: What is the approximate variance for Data Set 2C?
a. 1.5
b. 1.7
c. 2
d. 1.6
e. 1.8
Answer: b. 1.7
Question: In a normal distribution, the data represented are:
a. Skewed away from the median point.
b. Skewed toward the mean point.
c. Random.
d. Trustworthy.
e. Shaped like a triangle.
Answer: c. Random.
Question: One of the implications of the radium hypothesis was:
Answer Options:
a. Mixing pure uranium with impurities would increase the emission of rays.
b. Mixing uranium with radioactive thorium would increase the emission of rays.
c. Mixing pitchblende with impurities would increase the emission of rays.
d. An electrometer could be used to measure the intensity of the rays emitted by pitchblende.
e. An electrometer could be used to measure the intensity of X-rays.
Answer: a. Mixing pure uranium with impurities would increase the emission of rays.
Question: For Data Set 2A, what is the standard deviation?
a. √2
b. 1
c. √1.5
d. 2
e. 1.5
Answer: c. √1.5
Question: One of Pasteur’s hypotheses was that:
a. Boiling a nutrient solution destroyed its “vegetative force.”
b. Worms in rotting meat are caused by flies.
c. A microscope would reveal multiple life forms in pond water.
d. Heating oxygen destroyed its capacity to produce life.
e. Life forms are carried by dust particles in the atmosphere.
Answer: e. Life forms are carried by dust particles in the atmosphere.
Question: If the variance of a set of data is relatively large, then:
a. The standard deviation diverges from the variance.
b. The data tend to be more spread out from the mean point.
c. The sample does not accurately represent the population.
d. The population from which the data are extracted tends to be large.
e. Most of the data fall close to the mean point.
Answer: b. The data tend to be more spread out from the mean point.
Question: Suppose, to select a sample from a population of 3000 persons, the following procedure is followed. The names of the people are written on identical, square pieces of thin cardboard measuring one inch on a side, and these pieces of cardboard are then tumbled in a clothes dryer (with the heat shut off). After 30 minutes, a blindfolded person reaches in and withdraws a selected number of names. What can be said about this sample?
a. The sample is probably biased because clothes dryers are not supposed to be used in collecting samples.
b. The sample is probably biased because people with shorter names would be selected first.
c. The sample is probably biased because the names on the top of the heap would be selected first.
d. The sample is probably biased because the names toward the front of the dryer would probably be selected first.
e. The sample is almost certainly random.
Answer: e. The sample is almost certainly random.
Question: An example of an empirical hypothesis is:
a. Life comes only from life.
b. Nature abhors a vacuum.
c. An undiscovered planet is responsible for deviations in the orbit of Uranus.
d. Life is spontaneously generated from lifeless matter.
e. Space and time are relative to each other.
Answer: a. Life comes only from life.
Question: Which of the following problems would likely require a hypothetical explanation?
Answer Options:
a. Why you apply sunscreen when you go to the beach.
b. Why your gas powered lawnmower refuses to start.
c. Why you spray fertilizer on the plants in your garden.
d. Why you get a haircut.
e. Why the fish you put in the refrigerator a week ago smells bad.
Answer: b. Why your gas powered lawnmower refuses to start.
Question: One of the implications of the radium hypothesis was:
a. Mixing pure uranium with impurities would increase the emission of rays.
b. Mixing uranium with radioactive thorium would increase the emission of rays.
c. Mixing pitchblende with impurities would increase the emission of rays.
d. An electrometer could be used to measure the intensity of the rays emitted by pitchblende.
e. An electrometer could be used to measure the intensity of X-rays.
Answer: a. Mixing pure uranium with impurities would increase the emission of rays.
Question: Suppose that the costs of operating a certain restaurant increase by the following amounts: food: 4%, labor: 5%, electricity: 3%, taxes: 2%, repairs and maintenance: 4%. By how much have the costs of operating the restaurant increased?
a. 18%
b. Less than 5%.
c. The modal average of the increases for these five items.
d. Less than 2%.
e. More than 18%.
Answer: b. Less than 5%.
Question: Which of the following problems would likely require a hypothetical explanation?
a. Why you apply sunscreen when you go to the beach.
b. Why your gas powered lawnmower refuses to start.
c. Why you spray fertilizer on the plants in your garden.
d. Why you get a haircut.
e. Why the fish you put in the refrigerator a week ago smells bad.
Answer: b. Why your gas powered lawnmower refuses to start.
Question: Given Data Set 1C, what is the median age of the houses?
a. 3 years.
b. 5.4 years.
c. 4 years.
d. 4 years.
e. 4.6 years.
Answer: d. 4 years.
Question: Given Data Set 1B, what is the median age of the cars?
a. 4 years.
b. 3.5 years.
c. 5 years.
d. 5 years.
e. 6 years.
Answer: d. 5 years.