Question

Male and female populations of tortoises under 80 years old are represented by age in the table below. Complete parts (a) through (d). (a) Approximate the population mean and standard deviation of age for males (Round to two decimal places as needed.) Males Females 8 Age 0-9 10-19 20-29 30-39 10 16 9 (Round to two decimal places as needed.) (6) Approximate the population mean and standard deviation of age for females. 16 17 16 21 19 20 25 HE 23 (Round to two decimal places as needed.) 40-49 50-59 60-69 70-79 20 18 15 15 (Round to two decimal places as needed.) (c) Which gender has the higher mean age? have the higher mean age. (d) Which gender has the higher dispersion in age? have the greater dispersion Males Females Neither

Answer 1

Udle Solution Page No.: Age O-9 10-19 20-29 30-39 males mid point (X)|x. f. (x - y)2 + (x-x)² 10. 4.5 45 1440.96 14409.6 16 14.5. 232 781.76 12508.16 16 24.5 392 322.56 S160.96 34.5 552 63.36 1013.76 2) 44.5 934.5 4.16 87.36 23 54.5 1253.5 144.96 3334.08 20 64.5 112go (485.76 9715.2 15 79.5 [1117.5/1026.56 15398.4 16 40-99 so-s9 60-69 1.70-79 ex. f - population mean Eco 5816.5 137 pop 42.46. standard deviation Ef. (x-) 61627.52 T37 1499.94 6 21. 22.

voitol Age female 36 o-g 1.-19. 4.5 14.5 (x+y)2 1563.57 872.73 381.89 130.5 Dc20-29 S217 24.5 41615 130-39 19 655.5 91.55 31.5 49.5 f. (x-72 12508.55 7854.56 6492116 1729.94 9.20 2734.26 7533.55 13915.36 20 40-49 8050-59 225 890 0.21 1362.5 109:37 116) 418.53 1117.5 927.69 54.5 64.5 74.5 18 P 70-79 15 population mean : li ext Ef mostly 5769.5 13) lu 44.04 standard deviation 3 (2+(x-² V 52772.52 131 V 402.84 20. of

females have higher mean age. d] Males have the greater dispersion What is residual & What does it mean when residual is positive.& А residual is difference between an observed value responce variable y and predicted value If it is positive, then the obsessed value is greater than predicted value. of I