The power of the sample to detect the observed difference in population proportions (a = 0.05, one-sided). Power (%) = __________ The sample size needed to obtain 80% power to detect the observed difference in proportions as being statistically significant (a = 0.05). ________________
At a certain college, it is estimated that at most 20% of the students ride bicycles to class. The Student Advocacy Group claims that the proportion is higher than 20% and wants the University to increase infrastructure support for more cyclists. In a random sample of 94 college students, 27 are found to ride bicycles to class. Use a 0.05 level of significance. The null hypothesis is that the population proportion is 20%. The alternate hypothesis is that the population proportion is greater than 20% (one-sided).
- The power of the sample to detect the observed difference in population proportions (a = 0.05, one-sided).
Power (%) = __________
The
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