Question 1 2 pts Let x represent the number of pets in pet stores. This would be

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Question 1 2 pts

Let x represent the number of pets in pet stores. This would be considered what type of variable:

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Question 2 2 pts

Let x represent sheets of paper in a package. This would be considered what type of variable:

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Question 3 2 pts

Consider the following table.

If you created the probability distribution for these data, what would be the probability of 60-69?

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Question 4 2 pts

Consider the following table.

Find the mean of this variable.

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Question 5 2 pts

Consider the following table.

Find the variance of this variable.

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Question 6 2 pts

Consider the following table.

Find the standard deviation of this variable.

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Question 7 2 pts

The standard deviation of the number of video game A’s outcomes is 1.8940, while the standard deviation of the number of video game B’s outcomes is 1.6179. Which game would you be likely to choose if you wanted players to have the most choice and why?

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Question 8 2 pts

Fifteen golfers are randomly selected. The random variable represents the number of golfers who only play on the weekends. For this to be a binomial experiment, what assumption needs to be made?

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Question 9 2 pts

A survey found that 39% of all gamers play video games on their smartphones. Ten frequent gamers are randomly selected. The random variable represents the number of frequent games who play video games on their smartphones. What is the value of n?

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Question 10 2 pts

Thirty-five percent of US adults have little confidence in their cars. You randomly select ten US adults. Find the probability that the number of US adults who have little confidence in their cars is (1) exactly six and then find the probability that it is (2) more than 7.

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Question 11 2 pts

Say a business wants to know if each salesperson is equally likely to make a sale. The company chooses 5 salespeople and gathers information on their sales experiences. What assumption must be made for this study’s probability results to be used in future binomial experiments?

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Question 12 2 pts

Seven baseballs are randomly selected from the production line to see if their stitching is straight. Over time, the company has found that 89.4% of all their baseballs have straight stitching. If exactly five of the seven have straight stitching, should the company stop the production line?

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Question 13 2 pts

A soup company puts 12 ounces of soup in each can. The company has determined that 97% of cans have the correct amount. Which of the following describes a binomial experiment that would determine the probability that a case of 36 cans has all cans that are properly filled?

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Question 14 2 pts

A supplier must create metal rods that are 2.3 inches width to fit into the next step of production. Can a binomial experiment be used to determine the probability that the rods are the correct width or an incorrect width?

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Question 15 2 pts

In a box of 12 pens, there is one that does not work. Employees take pens as needed. The pens are returned once employees are done with them. You are the 5th employee to take a pen. Is this a binomial experiment?

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Question 16 2 pts

Sixty-one percent of employees make judgements about their co-workers based on the cleanliness of their desk. You randomly select 8 employees and ask them if they judge co-workers based on this criterion. The random variable is the number of employees who judge their co-workers by cleanliness. Which outcomes of this binomial distribution would be considered unusual?

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Question 17 2 pts

Sixty-eight percent of products come off the line within product specifications. Your quality control department selects 15 products randomly from the line each hour. Looking at the binomial distribution, if fewer than how many are within specifications would require that the production line be shut down (unusual) and repaired?

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Question 18 2 pts

The probability of a potential employee passing a drug test is 86%. If you selected 12 potential employees and gave them a drug test, how many would you expect to pass the test?

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Question 19 2 pts

The probability of a potential employee passing a training course is 86%. If you selected 15 potential employees and gave them the training course, what is the probability that 12 or less will pass the test?

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Question 20 2 pts

Off the production line, there is a 3.7% chance that a candle is defective. If the company selected 45 candles off the line, what is the probability that fewer than 3 would be defective?

Explanation / Answer

1) Let x represent the number of pets in pet stores.

Here , the variable is discrete type variable

Because the pets in pets store are countably finite.

The variable taking contably finite or countably infinite values are called discrete variable.

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