Basic Arithmetic : Basic Statistics

Study concepts, example questions & explanations for Basic Arithmetic

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Example Questions

Example Question #321 : Basic Arithmetic

Steven is a high school athlete who competes in the long jump. He recorded his last 7 jumps: 15 feet, 18 feet, 19 feet, 12 feet, 15 feet, 18 feet, 15 feet. What is the mode of his long jump lengths?

Possible Answers:

Correct answer:

Explanation:

The mode of a data set is the number that occurs most often. Because Steven managed to long jump 15 feet 3 times, 15 feet is the mode.

Example Question #1 : Mode

For a school project, Jonas asked his classmates how many siblings they had.  of his classmates had  siblings,  had  sibling,  had  siblings, and  had  siblings. What is the mode of the number of siblings his classmates had?

Possible Answers:

Correct answer:

Explanation:

In a data set, the mode is the number that occurs most frequently.

Because 18 of his classmates only had 1 sibling, 1 is the number that appears most often.

Example Question #322 : Basic Arithmetic

The weekly salaries for 6 Starbucks employees are as follows:

 

What is the mode?

Possible Answers:

Correct answer:

Explanation:

The mode in a set of numbers is the one that appears most frequently.

Because $140 appears 3 times, more than any other number, it must be the mode.

Example Question #323 : Basic Arithmetic

Anthony takes six math tests and achieves these scores:

Find the mode of these scores.

Possible Answers:

Correct answer:

Explanation:

The mode is the number that is repeated most often. In this set of scores, the two numbers repeated are 76 (repeated twice) and 86 (repeated three times). Since 86 is repeated most, it is the mode.

Example Question #324 : Basic Arithmetic

Stacey achieved these times in a relay race:

Her times are in seconds. What is the mode of these times?

Possible Answers:

Correct answer:

Explanation:

The mode is the number that appears the most within a set of numbers. Since no number is repeated in this set, there is no mode.

Example Question #51 : Basic Statistics

Thomas takes five tests and achieves these scores: 

Which of the following scores, if Thomas gets that score on his sixth test, will make the mode of this set of numbers above an ?

Possible Answers:

Correct answer:

Explanation:

The mode is the number in a set that appears the most. Since there are two numbers within the set of five test scores that appear twice, choose the number that is above , which is 82. The mode is .

Example Question #2 : Mode

Which of the following data sets has exactly one mode regardless of the value of ?

Possible Answers:

Correct answer:

Explanation:

 is the correct set; no matter what  is, no value other than 10 can appear four or more times.

To see that no other choice works, let's examine them.

: If  is any number other than 10 or 11, then the number has 10 and 11, and possibly one other number, as modes, each appearing twice.

 : If  is not any of the numbers already in the set, the set has no repeated values and thus no mode.

: If , then the set is bimodal, with 8 and the modes.

 : If , the set is bimodal, with 10 and 11 the modes.

Example Question #51 : Basic Statistics

Determine the mode of the set.

Possible Answers:

Correct answer:

Explanation:

Mode refers to the number occuring most often, so in this example we are looking for the numbers that repeat and how many times they repeat. 

 repeats twice

 repeats twice

 repeats twice 

Now because all three numbers repeated an equal amount of time, all three then become our mode. 

Answer : 

Example Question #51 : Basic Statistics

What is the mode?

Possible Answers:

Correct answer:

Explanation:

Mode is the data point that occurs most frequently. If we arrange in increasing order, we have 

 occurs most frequently as it appears three times.

Some of them occur twice which isn't good enough. 

 is the correct answer. 

Example Question #52 : Basic Statistics

What is the mode?

Possible Answers:

Correct answer:

Explanation:

Mode is the data point that occurs most frequently.

Let's arrange in increasing order. We have 

 and  occur twice and are the most frequent. We can have more than one mode so the answer is 

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