A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 30 thousand miles and a standard deviation of 12 thousand miles. Complete parts (a) through (d) below. TRound to ioui decimai piaces as needed.) b. What percentage of trucks can be expected to travel either less than 20 or more than 50 thousand miles in a year? The percentage of trucks that can be expected to travel either less than 20 or more than 50 thousand miles in a year is 25.02 %. (Round to two decimal places as needed.) c. How many miles will be traveled by at least 75% of the trucks? The number of miles that will be traveled by at least 75% of the trucks is miles.

KINDLY SEND ALL ANSWERS:   The tensile strength of a certain metal component is normally distributed with a mean of 10,000 kilograms per square centimeter and a standard deviation of 100 kilograms per square centimeter. Measurements are recorded to the nearest 50 kilograms per square centimeter. a. What proportion of these components exceed 10,150 kilograms per square centimeter in tensile strength?  b. If specifications require that all components have a tensile strength between 9800 and 10,200 kilograms per square centimeter inclusive, what proportion of pieces would we expect to scrap?   NOTE: THREE DECIMAL PLACES, SEND SOLUTIONS HANDWRITTEN IF POSSIBLE. THANK YOU

Steve's average golf score at his local course is 92.9 from a random sample of 60 rounds of golf. Assume that the population standard deviation for his golf score is 4.2. The standard error of the mean for this sample is ________. A)  0.54 B)  1.17 C)  1.56 D)  2.30