Four equal sampled plots contain 18, 20, 22, 24 surviving plants. Each plot is 2 m² and originally contained 30 plants. The entire bed is 160 m². For this numerical estimate assume samples represent the bed; this assumption is not proven by counting. No confidence interval or treatment decision is requested.
Calculate the estimated survivors in the whole bed. Keep intermediate values unrounded; round the final result to four decimal places if necessary.
