Statistics and Probability Answers

A jar contains 5 red marbles numbered 1 to 5 and 8 blue marbles numbered 1 to 8 . A marble is drawn at random from the jar. Find the probability the marble is

a. Even-numbered given that the marble is red.

b. Red given that the marble is even-numbered.

0. After receiving a failing grade in ECON 306, a student complained to the professor that the examination was unfair. The student claims that ‘almost everyone’ did worse in the examination than in the Interim Assessment (IA), and that the average mark in the examination was much lower than the IA. The Professor then asked 8 students who were in his office about the marks they obtained in IA and the examination. The marks were as follows: Student s Adwoa Kofi Afua Ama Kwame Abena Yaw Esi IA 59 69 54 77 70 59 85 92 Exams 72 44 52 81 88 94 78 86 Test the claim of the student if the marks are normally distributed at 5% level of significance

How do I find the values of more than one data in a set given the values of harmonic geometric and arithmetic mean i.e

In a study a set of observations were as follows:x,16,20b,4,25,c.Given that the geometric mean is 8.433 the arithmetic mean 11.25 and the harmonic mean 6.026 compute the values x y z

Calculate the correlation coefficient of the following data: x 45 46 46 47 48 49 50 y 44 48 45 48 52 51 49

A multiple choice form has 20 questions; each question has 3 choices. In how many possible ways can the exam be completed

How do I find the values of more than one data in a set given the values of harmonic geometric and arithmetic mean i.e

In a study a set of observations were as follows:x,16,20b,4,25,c.Given that the geometric mean is 8.433 the arithmetic mean 11.25 and the harmonic mean 6.026 compute the values x y z

A random sample of 16 values from a normal population showed a mean 41.5 inches and sum of squares of deviations from this mean equal to 135 square inches. Show that assumption of a mean of 43.5 inches for the population is not reasonable. Obtain 95% and 99% confidence limits for same.

How many took Math as their only subject? English only? Filipino only

A random variable X, the time taken by a garage to service a car, takes values between 0 and 10

hours with cumulative distribution function. F(x)= A + B In (3x + 2) for 0≤ x ≤ 10.

Find the values of A and B.

choose the related type of variable from the options

below:

A. nominal C. interval

B. ordinal D. ratio

Means of transportation

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