1.Weights, in pounds, of ten-year-old girls are collected from aneighborhood. A sample of 26 is given below. Assuming normality,use Excel to find the 98% confidence interval for the populationmean weight μ. Round your answers to three decimal places and useincreasing order.Weight
66.4
86.3
71.3
52.8
68.0
85.0
66.2
79.2
93.5
84.5
71.1
74.5
65.0
58.5
59.8
80.2
69.2
92.9
78.9
59.4
63.6
66.5
60.7
80.1
60.4
74.5
2.
Julia wants to estimate the percentage of people who submittheir tax returns online. She surveys 330 individuals and findsthat 65 submit their tax returns online.
Find the margin of error for the confidenceinterval for the population proportion with a 95% confidencelevel.
| z0.10 | z0.05 | z0.025 | z0.01 | z0.005 |
| 1.282 | 1.645 | 1.960 | 2.326 | 2.576 |
Use the table of common z-scores above.
- Round the final answer to three decimal places
