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a manufacturer of baseball hats claims that approximately 30% of people…

Question

a manufacturer of baseball hats claims that approximately 30% of people regularly wear baseball hats. from a random sample of 20 students at your school, you find that only four wear baseball hats regularly. this gives you reason to believe that the manufacturers claim of 30% is too high. let the digits 0 - 2 represent wearing a baseball hat (h) and the digits 3 - 9 represent not wearing a baseball hat (n). use the table of random numbers to run one trial of this simulation. which is the correct sequence of outcomes? nnnnn hhnmn nnnhn nhnhn hhhhh nnnnn nnnnn nnnnn nhnhn hnhnh nhnhn hninhh hhhhh nnhhh hhnhh hninhh

Explanation:

Step1: Analyze each option

  • For the first option:
  • In \(NNNNN\), all are \(N\) (not wearing).
  • In \(HHNNN\), there are \(2\) \(H\)s (wearing).
  • In \(NNNHN\), there is \(1\) \(H\).
  • In \(NHNHN\), there are \(2\) \(H\)s.
  • For the second option:
  • In \(HHHHH\), all are \(H\)s.
  • In \(NNNNN\), all are \(N\)s.
  • In \(NNNNN\), all are \(N\)s.
  • In \(NNNNN\), all are \(N\)s.
  • For the third option:
  • In \(NHNHN\), there are \(2\) \(H\)s.
  • In \(HNHNH\), there are \(3\) \(H\)s.
  • In \(NHNHN\), there are \(2\) \(H\)s.
  • In \(HN HNH\), there are \(3\) \(H\)s.
  • For the fourth option:
  • In \(HHHHH\), all are \(H\)s.
  • In \(NNHHH\), there are \(3\) \(H\)s.
  • In \(HHHNH\), there are \(4\) \(H\)s.
  • In \(HN HNH\), there are \(3\) \(H\)s.

Step2: Check the proportion

The manufacturer claims \(30\%\) (or \(0.3\)) of people wear hats. In a sample of \(20\), we would expect \(20\times0.3 = 6\) \(H\)s approximately.

  • The first option has a total of \(2 + 1+2=5\) \(H\)s (approximate count for all four sequences combined, but we need to check per - sequence).
  • The second option has \(5\) \(H\)s in total (from \(HHHHH\)) and the rest are all \(N\)s.
  • The third option:
  • Each sequence has \(2\) or \(3\) \(H\)s. If we consider a trial (assuming each sequence is a group of \(5\) students, and \(4\) groups make \(20\) students). The total number of \(H\)s: \((2 + 3+2 + 3)=10\). The proportion is \(\frac{10}{20}=0.5\) (not \(0.3\)).
  • The first option:
  • If we assume each sequence is a group of \(5\) students (\(4\) groups make \(20\) students). The total number of \(H\)s: \(2+1 + 2=5\) (if we consider the sum of non - all \(N\) sequences). But if we look at each sequence:
  • For \(NNNNN\) (\(0\) \(H\)s), \(HHNNN\) (\(2\) \(H\)s), \(NNNHN\) (\(1\) \(H\)), \(NHNHN\) (\(2\) \(H\)s). The total number of \(H\)s \(0 + 2+1+2=5\) (proportion \(\frac{5}{20}=0.25\approx0.3\) when considering randomness in simulation).

Answer:

The first option \(NNNNN\ HHN NN\ NNNHN\ NHNHN\)