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The average age of public jeepneys plying in Metro Manila is 15 years. Assume that the standard deviation is 8 years. If a random sample of 25 public jeepneys is chosen, Find the probability that the mean of jeepneys ages is between 12 and 19.
Kaitlyn is flipping a coin two times, and records the result of each flip. Which of the sets below is the entire sample space?
{HH,TT,HT,TH}
What is the probability of obtaining heads twice?
What is the probability of obtaining heads exactly once?
What is the probability of obtaining heads at least once?
What is the probability of obtaining no heads?
Suppose that the mean stopping time of a particular model of car moving at 40 mph is listed
as 1.8 seconds, with a standard deviation of 0.25 seconds. A random sample of 12 cars obtains a
standard deviation of 0.35 seconds. Test the claim that o = 0.25 seconds at the 0.05 level of significance
Suppose that a survey of 500 randomly selected registered voters are asked whether they voted in
the last presidential election and that 49% said that they had. We wish to test the claim at the a = 0.05 level of
significance that more than 50% of registered voters voted in the last presidential election.
During an experiment, 78.0 grams of CH4 reacts with 102.0 grams of O2 to produce water and carbon dioxide (CO2).
CH4 + 2O2 ---> 2H2O + CO2
Mole Ratio: Molar Mass Ratio:
1 mol CH4 = 1 mol CO2 1 mol CH4 = 16.01 g CH4
1 mol CO2 = 44.01 g CO2
An element with mass 140 grams decays by 21.6% per minute. How much of the element is remaining after 20 minutes, to the nearest 10th of a gram?
A portable television using a 12V, 3Ah rechargeable battery can operate for a period of about 6 h. What is the average current drawn during this period?
If you use volleyball as a model of earth, how big would be 1kilometer? The volleyball has a conference of 68 cm.
AgF(aq) + Fe(CO3)3(aq)
A. Assume that the GPA of college students in Luzon is approximately normally distributed. The
average GPA is 2.455 with a standard deviation of 0.66. Find the percentage of students who
obtained GPA below 1.25.
