In the following hypothetical scenarios, classify each of the specified numbers as a parameter or a statistic.
a. There are 100 senators in the 114th Congress, and 54% of them are Republicans. The 54% here is a
b. In 1936, Literary Digest polled 2.3 million adults in the United States, and 57% of them said they would vote for
c. Alf Landon for the Presidency. The 57% here is a
d. The survey results from 12 local parks show the mean height of 60 ft for mature oak trees. The mean height of 60 ft is a
e. The 72 employees at ABC company have a mean income of $52,317 with a standard deviation of $36,829. The $36,829 is a
f. In a random sample of business owners in the United States, it is found that 63% of the sampled business owners attend at least one business conference per year. The 63% here is a

Three coins are flipped. what is the probability that there will be at least two tails?

In a sample of 2023 u.s. adults, 373 said franklin roosevelt was the best president since world war ii. two u.s. adults are selected at random from the population of all u.s. adults without replacement. assuming the sample is representative of all u.s. adults, complete parts (a) through (d). (a) find the probability that both adults say franklin roosevelt was the best president since world war ii. the probability that both adults say franklin roosevelt was the best president since world war ii is (round to three decimal places as needed.) (b) find the probability that neither adult says franklin roosevelt was the best president since world war ii. the probability that neither adult says franklin roosevelt was the best president since world war ii is (round to three decimal places as needed.) (c) find the probability that at least one of the two adults says franklin roosevelt was the best president since world war ii. the probability that at least one of the two adults says franklin roosevelt was the best president since world war ii is (round to three decimal places as needed.) (d) which of the events can be considered unusual? explain. select all that apply. the event in part left parenthesis a right parenthesis is unusual because its probability is less than or equal to 0.05. the event in part (b) is unusual because its probability is less than or equal to 0.05. none of these events are unusual. the event in part (c) is unusual because its probability is less than or equal to 0.05.

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years