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Sergio039 [100]
3 years ago
9

how many people do you need to gather to be sure that at least two of them have birthdays in the same month?

Mathematics
2 answers:
frosja888 [35]3 years ago
6 0
You would need 13. Since there are 12 months, if you gather 12 people and they each have different months, there would be 1 person per month. If you add 1 more person, it is safe to assume that that person will be with another person in a certain month.
tia_tia [17]3 years ago
3 0
When 23 people<span> are gathered, there is more chance than not that 2 of them have the same birthday. In order to help understand this, you should consider how many PAIRS of people there are. With </span>23 people<span> there are 253 different pairings i.e. more than half of the 365 possible birthdays.</span>
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A simple random sample of n measurements from a population is a subset of the population selected in a manner such that which of
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Answer:

a) sample of size n from the population has an equal chance of being selected.

b) Every member of the population has an equal chance of being included in the sample.                                            

Step-by-step explanation:

Simple random sampling:

  • It is a type of probabilistic sampling.
  • It is an unbiased representation of population.
  • The probability of selection is equal for every observation.
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  • A simple random sample is a subset of a statistical population in which each member of the subset has an equal probability of being chosen.
  • Thus,the correct interpretation is given by,

a) sample of size n from the population has an equal chance of being selected.

b) Every member of the population has an equal chance of being included in the sample.

  • c) The simplest method of selection is used to create a representative sample.

The statement is false.

There is no pattern or technique used for selection. The selection is purely random.

  • d) Each subset of the population has an equal chance of being included in the sample.

The statement is false.

Each object of the population has an equal chance of being included in the sample. and not each subset.

  • e) Every sample of size n from the population has a proportionally weighted chance of being selected.

The given statement is false.

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