I only have 40 mins please answer as fast as you can as I am comparing my answers to you. No need to show solutions. Total of 4 questions

QUESTION 10 Determine the mean and standard deviation from the histogram shown. Frequency OH =3 , 0 = 1.57 OH =3 , 0 = 1.41 OH = 2.21 , 0 = 1.41 OH =2.45 , 0 = 1.59QUESTION 12 \\ Find the mean for the following set of data regarding melting points of certain substances. Substance Substance Magnesium 620 Zinc 389.1 Glycerol 12.9 Aluminum 689.2 Gold 1,091 Plutonium 711.2 Iron 1,897 Carbon 2,981 Phosphorus 28.4 O 935.53 O 651.220 0 922.88 O 559.870QUESTION 13 3 Find the median for the following set of data regarding life expectancy State Years State Years Oregon 55 Connecticut 78 South Carolina 70.1 New Mexico 66 Minnesota 70.1 Massachusetts 55.7 Virginia 67.8 Ohio 89 Pennsylvania 88.6 Colorado 80.0 Illinois 66.1 O 67.8 O 78 O 70.1 O 80.1QUESTION 9 3 Find z if the standard normal curve area between -z and z is 0.2013. O +0.215 O +0.288 O +0.315 O +0.255