Question 3 (1 point) Saved WARNING: THERE IS NO PARTIAL CREDIT HERE -- YOU NEED TO HAVE THE FINAL ANSWER EXACTLY CORRECT WITH THE STATED NUMBER OF DECIMALS. The population standard deviation of monthly spending by US online shoppers is known to be $21.00. A sample of 500 US online shoppers was obtained, and the sample average spending was found to be $123.00 per person per month. What is the predicted 99% margin of error for the amount of money spent per month in the population? Answer should have two decimal places and NO dollar sign (e.g., 3.21). Your Answer: 2.36 Answer Question 4 (1 point) Saved What is the mean number of eggs a hen lays in a year? Data were collected over a year from 300 hens living in farms across the US. The mean number of eggs laid by hens in the sample was 254, with a population standard deviation of 15. What is the 90% confidence interval for the population mean number of eggs per hen per year (rounded to the nearest whole number)? .::j_:::. 239, 269 .;:f_::. 253, 255 229, 279 {E} 252, 256