9. A survey on a sample of persons who played at least one of the video games P, Q and R yielded the following data: 33 persons played P 40 persons played Q 36 persons played R 7 persons played P and R only 4 persons played P and Q only 12 persons played Q and R only 15 persons played Q only. (a) Use x to represent the number of persons who played all three video games. Draw a carefully labelled Venn diagram to represent the data given. (b) Determine the value of x. (c) Calculate the number of persons in the sample.

Q: If u = and , then what is the magnitude of 2 + . Round to the nearest hundredth. Answer:

A:

Q: Find B - A. - 7 B = 2 6 A = 2 6 6 - 4 B-A =

A:

Q: IV4 +x dr

A:

Q: 75% of students who graduated from high school in 2006 took the SAT, and 40% of 2006 high school…

A: We will understand the given situation as  A={75% of students who took SAT} A={40% of students who…

Q: Let ā = and b . Find 3ā + b. -

A: We will simply use vector addition rules to find the answer

Q: If 1 waffle costs 30 hats, the cost of 12 waffles is ______?

A: Given cost of 1 waffle is 30 hats So, the cost of 12 waffles will be - Cost 12 waffles = 12*30 Cost…

Q: Hunter makes $3.00 an hour for their first hour of work, $4.00 an hour for their second, $5.00 an…

A:

Q: Find the value of a, b, and c if (a+b)(a+b+c)=21, (a+c)(a+b+c)=35, and (b+c)(a+b+c)=42.

A: First we need to make some equations and the we have to simplify them in order to get a, b and c.

Q: Use de Moivre’s theorem with n = 4 to prove that cos(4θ) = 8 cos^4 (θ) − 8 cos^2 (θ) + 1

A:

Q: Roll a fair die repeatedly; X� represents the number of rolls it takes to get a six.

A: Roll a fair die repeatedly; X represents the number of rolls it takes to get a six.

Q: during basketball practice brent made 36 free throws in 3 minutes A. how many free throws will…

A: Multiply

Q: A student receves test scores of 62. 83, and 91. The student's final exam seore n 88, and homework…

A: Given: Test scores of the student is 62, 83 and 91 Weightage for each test=20% Final exam score=88…

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.