Final assignment | Algebra homework help

Question 1 (3 points)

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Which of the following is the operation called standardizing?

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Question 2 (3 points)

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Given that Z is a standard normal variable, the value z for which P(Z https://go.view.usg.edu/content/enforced/1179012-WMBA6040-Quant-Summer2016-Boakye-C63/RspQ-Test%202%20S10/eq_95bb94.gif?_&d2lSessionVal=QMYvmirLCUAvxFpES8z8yJPLo z) = 0.2580 is

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Question 3 (3 points)

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https://go.view.usg.edu/content/enforced/1179012-WMBA6040-Quant-Summer2016-Boakye-C63/RspQ-Test%202%20S10/eq_95b5ea.gif?_&d2lSessionVal=QMYvmirLCUAvxFpES8z8yJPLo is the:

Question 3 options:

rule of complements

commutative rule

addition rule

rule of opposites

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Question 4 (3 points)

 uestion 4 Unsaved

Which of the following statements are true?

Question 4 options:

Probabilities must be nonnegative.

Probabilities can be any positive value.

Probabilities must be negative.

Probabilities can either be positive or negative.

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Question 5 (3 points)

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If two events are collectively exhaustive, what is the probability that one or the other occurs?

Question 5 options:

0.25

0.50

1.00

Cannot be determined from the information given

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Question 6 (3 points)

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 The joint probabilities shown in a table with two rows, A1and Aand two columns, Band B2, are as follows: P(Aand B1) = .10, P(Aand B2) = .30, P(A2 and B1) = .05, and P(Aand B2) = .55. Then P(A1|B1), calculated up to two decimals, is

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Question 7 (3 points)

 uestion 7 Unsaved

There are two types of random variables, they are

Question 7 options:

discrete and continuous

real and unreal

exhaustive and mutually exclusive

complementary and cumulative

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Question 8 (3 points)

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If P(A) = 0.25 and P(B) = 0.65, then P(A and B) is:

Question 8 options:

0.25

0.40

0.90

Cannot be determined from the information given.

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Question 9 (3 points)

 uestion 9 Unsaved

If two events are independent, what is the probability that they both occur?

Question 9 options:

0.00

0.50

1.00

Cannot be determined from the information given.
 

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Question 10 (3 points)

 uestion 10 Unsaved

We assume that the outcomes of successive trials in a binomial experiment are:

Question 10 options:

probabilistically independent

random number between 0 and 1

probabilistically dependent

identical from trial to trial

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Question 11 (3 points)

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The mean of a binomial distribution with parameters and p is given by:

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Question 12 (3 points)

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The mean https://go.view.usg.edu/content/enforced/1179012-WMBA6040-Quant-Summer2016-Boakye-C63/RspQ-Test%202%20S10/eq_95b9de.gif?_&d2lSessionVal=QMYvmirLCUAvxFpES8z8yJPLo of a probability distribution is a:

Question 12 options:

measure of variability of the distribution

measure of relative likelihood

measure of skewness of the distribution

measure of central location

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Question 13 (3 points)

 uestion 13 Unsaved

One reason for standardizing random variables is to measure variables with:

Question 13 options:

similar means and standard deviations on two scales

different means and standard deviations on a non-standard scale

different means and standard deviations on a single scale

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Question 14 (3 points)

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In a continuous probability distribution, the total probability is spread over a continuum. What is the value of the total probability?

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Question 15 (5 points)

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Consider a random variable X with the following probability distribution:

 
P(X=0) = 0.25, P(X=1) = 0.35, P(X=2) = 0.15, P(X=3) = 0.10, and P(X=4) = 0.15.

 
Find the mean and standard deviation of X.

Question 15 options:

pell check

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Question 16 (3 points)

 uestion 16 Unsaved

Consider a random variable X with the following probability distribution:

 
P(X=0) = 0.08, P(X=1) = 0.22, P(X=2) = 0.25, P(X=3) = 0.25, P(X=4) = 0.15, P(X=5) = 0.05

Find P(X<2)

Question 16 options:

pell check

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Question 17 (3 points)

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Suppose that 20% of the students of Big Rapids High School play sports. Moreover, assume that 55% of all students are female, and 15% of all female students play sports.
https://go.view.usg.edu/content/enforced/1179012-WMBA6040-Quant-Summer2016-Boakye-C63/RspQ-Test%202%20S10/quiz4sa_questionsbap-img-11.gif?_&d2lSessionVal=QMYvmirLCUAvxFpES8z8yJPLo
If we choose a student at random from this school, what is the probability that this student is a male who does not play sports?

Question 17 options:

pell check

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Question 18 (4 points)

 uestion 18 Unsaved

The grades on the final examination given in a large organic chemistry class are normally distributed with a mean of 72 and a standard deviation of 8. The instructor of this class wants to assign an “A” grade to the top 10% of the scores, a “B” grade to the next 10% of the scores, a “C” grade to the next 10% of the scores, a “D” grade to the next 10% of the scores, and an “F” grade to all scores below the 60th percentile of this distribution. For a letter grade of C, find the lowest acceptable score within the established range. Provide your answer in the format XX.X, for example 83.4.

Question 18 options:

pell check

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Question 19 (4 points)

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The service manager for a new appliances store reviewed sales records of the past 20 sales of new microwaves to determine the number of warranty repairs he will be called on to perform in the next 90 days. Corporate reports indicate that the probability any one of their new microwaves needs a warranty repair in the first 90 days is 0.05. The manager assumes that calls for warranty repair are independent of one another and is interested in predicting the number of warranty repairs he will be called on to perform in the next 90 days for this batch of 20 new microwaves sold.

 
What is the probability that only one of the 20 new microwaves sold will require a warranty repair in the first 90 days?

Question 19 options:

pell check

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Question 20 (3 points)

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A popular retail store knows that the distribution of purchase amounts by its customers is approximately normal with a mean of $30 and a standard deviation of $9. 

What is the probability that a randomly selected customer will spend exactly $28 at this store?

Question 20 options:

pell check

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Question 21 (3 points)

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A popular retail store knows that the distribution of purchase amounts by its customers is approximately normal with a mean of $30 and a standard deviation of $9. 

What is the probability that a randomly selected customer will spend less than $15 at this store?

Question 21 options:

pell check

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Question 22 (3 points)

 uestion 22 Unsaved

If X is a normal random variable with a standard deviation of 10, then 3has a standard deviation equal to

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Question 23 (2 points)

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Given that events A and are independent and that P(A) = 0.8 and P(B/A) = 0.4, then P(A and B) = 0.32.

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Question 24 (2 points)

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If A and are independent events with P(A) = 0.40 and P(B) = 0.50, then P(A|B) is 0.50.

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Question 25 (2 points)

 uestion 25 Unsaved

The number of television sets sold on a given day is a continuous random variable.

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Question 26 (2 points)

 uestion 26 Unsaved

If P(and B) = 0, then A and B must be collectively exhaustive.

Question 26 options:

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Question 27 (2 points)

 uestion 27 Unsaved

Two or more events are said to be exhaustive if one of them must occur.

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Question 28 (2 points)

 uestion 28 Unsaved

Two or more events are said to be mutually exclusive if at most one of them can occur.

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Question 29 (2 points)

 uestion 29 Unsaved

The left half under the normal curve is slightly smaller than the right half.

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Question 30 (2 points)

 uestion 30 Unsaved

The binomial distribution is a discrete distribution that deals with a sequence of identical trials, each of which has only two possible outcomes.

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Question 31 (2 points)

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The variance of a binomial distribution for which n = 50 and p = 0.20 is 8.0.

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Question 32 (2 points)

 uestion 32 Unsaved

A random variable X is standardized when each value of X has the mean of subtracted from it, and the difference is divided by the standard deviation of X.

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Question 33 (2 points)

 uestion 33 Unsaved

Using the standard normal curve, the Z– score representing the 10th percentile is 1.28.

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Question 34 (2 points)

 uestion 34 Unsaved

A random variable X is normally distributed with a mean of 100 and a variance of 25. Given that X = 110, its corresponding Z– score is 0.40.

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Question 35 (3 points)

 uestion 35 Unsaved

The president of a bank is attempting to arrange a meeting with the three vice presidents for a Friday weekly meeting. He believes that each of these three busy individuals, independently of the others, has about 40% chance of being able to attend the meeting. If the meeting will be held only if every vice president can attend, what is the probability that the meeting will take place?

Question 35 options:

pell check

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Question 36 (3 points)

 uestion 36 Unsaved

Researchers studying the effects of a new diet found that the weight loss over a one-month period by those on the diet was normally distributed with a mean of 9 pounds and a standard deviation of 3 pounds.

 
If a dieter is selected at random, what is the probability that the dieter lost exactly 8 pounds?

Question 36 options:

pell check

 

 

 

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