1. You are conducting a study to see if the accuracy rate for
fingerprint identification is significantly less than 12%.
With H1 : p << 12%
you obtain a test statistic of z=?3.231z=-3.231.
Proportion testing always follows the standard normal
distribution.
Find the p-value accurate to 4 decimal places.
2. You intend to estimate a population mean ?? with the following sample.
| 56 |
| 80.7 |
| 112.5 |
| 71.3 |
| 69.8 |
| 84.3 |
| 54.3 |
You believe the population is normally distributed. Find the 95%
confidence interval. Enter your answer as
an open-interval (i.e.,
parentheses) accurate to two decimal places (because the sample
data are reported accurate to one decimal place).
95% C.I. =
Answer should be obtained without any preliminary rounding.
However, the critical value may be rounded to 3 decimal places.