A random sample of 150 observations was classified into the categories shown in the following table:
Category | |||||
| 1 | 2 | 3 | 4 | 5 |
ni | 28 | 35 | 33 | 25 | 29 |
a. Do the data provide sufficient evidence that the categories are not equally likely? Use α = .10.
b. Form a 90% confidence interval for p2, the probability that an observation will fall into category 2.
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