Math Answers

Random samples with size 5 are drawn from the population containing the values 26, 32, 41, 50, 58, and 63. Determine the number of possible samples with size 5. 

The following are the ages of 8 jeepney passengers in a waiting shed: 12, 15, 18, 19, 21, 23, 35, and 40. The sample with size 7 is chosen to ride in the current jeepney. Find the mean of the sample standard deviations.

The following are the ages of 8 jeepney passengers in a waiting shed: 12, 15, 18, 19, 21, 23, 35, and 40. The sample with size 7 is chosen to ride in the current jeepney. Determine the number of possible samples with size 7

f(x)=x² from x=0 to x=5

. Water is flowing downhill at 15.0m/s through a pipe that is at an angle of 75o with the horizontal. What are the components of its velocity?

Four forces act on an object such that the object is at rest. Three of the forces are given by

F1 = 2i −2j, F2 = i −4j, F4 = −3i −5j. Determine F3 and its magnitude

. The annual salaries of four men were $15,000, $16,000, $16,500, and $40,000. 

Find the arithmetic mean of their salaries

Find the corresponding area under the normal curve:the right of z=-1.31

A manufacturer of automobile seats has a production line that produces an average of 100 seats per day. Because of new Government regulations, new safety devices have been installed, which the manufacturer believes will reduce average daily output. A random sample of 15 days output after the installation of the safety devices is shown below:

93, 103, 95, 101, 91, 105, 96, 94, 101, 88, 98, 94, 101, 92, 95

Assuming that the daily output is normally distributed, is there sufficient evidence at the 5% level of significance, to conclude that average daily output has decreased following the installation of the safety devices?

1.4 If Universal Set U = {90, 91 , 92 , 93 , 94, 95 , 96 , 97 , 98, 99 , 100} (10)

 A = {90, 92, 94, 96, 98, 100}, 

 B= {91, 93, 95, 97, 99}, 

 C = {90, 94, 98}

 1.4.1 What is (A ∩ C)c 

 1.4.2 What is(B ∪ C)c