Confidence Margin of Required Sample Size (n) Level Error O 90% 0.08 unit 95% 0.09 unit 95% 0.1 unit 99% 0.03 units 99% 0.07 unit
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- Explain the type of Equation used for confidence interval calculation?It is required to construct a (1−?)100% confidence interval for the true population median, M using the sign test method. Describe how this can be done.Assuming that the number of birds is normally distributed, approximate a 90% confidence intervalfor the actual mean.
- indicator for gender (=1 if male, =0 if female). Your data set has 200 observations. donation = 1.57 + 0.12age + 0.08age? – 0.43 gender + 0.07(gender * age), R? = 0.33 (0.15)* (0.67) (0.11) (0.01) (0.06) donation = 1.59 (0.68) 0.46 gender, R² = 0.30 (0.17) 1. Assuming homoscedastic errors, test the hypothesis that age affects charitable donations at the 5% level. 2. Interpret the coefficient on gender interacted with age. 3. How would you test that the difference in giving between men and women is independent of age? If you can run the test, run it. If you cannot, explain what you need.Sample size 1008 margin of error 3.1%confidence level 19/20A dataset has the following characteristics: Standard deviation: 100 Sample size: 25 What is the approximate standard error of the mean for this dataset? A/