Individual Assignment #6 – Is That Feature Standard?

Quiz Instructions

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Instructions: This assignment is related to your Chapter 3 (Salkind) material. It is not timed but the assignment must be submitted by the specified due date. Individual Assignments that are not submitted will receive a grade of “0”. This assignment is worth 10 points.

In baseball, you can measure a player’s RBIs (or Runs Batted In), which refers to the number of times a batter makes a play that allows a run (point) to be scored for their team. Below are the total RBIs from 20 players from the regular season for the two teams that went to the world series in 2019, the Houston Astros and the Washington Nationals.

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Runs Batted In per Team
Astros Nationals
7849
9065
74126
104110
11257
9650
5962
5643
4056
763
1142
5827
348
1740
53
2110
94
102
101
22

 

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Instructions: This assignment is related to your Chapter 3 (Salkind) material. It is not timed but the assignment must be submitted by the specified due date. Individual Assignments that are not submitted will receive a grade of “0”. This assignment is worth 10 points.

In baseball, you can measure a player’s RBIs (or Runs Batted In), which refers to the number of times a batter makes a play that allows a run (point) to be scored for their team. Below are the total RBIs from 20 players from the regular season for the two teams that went to the world series in 2019, the Houston Astros and the Washington Nationals.

Runs Batted In per Team
Astros Nationals
7849
9065
74126
104110
11257
9650
5962
5643
4056
763
1142
5827
348
1740
53
2110
94
102
101
22

 

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Question 1 1 pts
Using the data above which of the following is the mean for the Nationals?
Group of answer choices

45.632

44.650

41.000

27.518

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Question 2 1 pts

Using the data above, which of the following is the variance for the Nationals?

 

Group of answer choices

1384.766

23820

35.553

1253.684

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Question 3 1 pts
Using the data above, which of the following is standard deviation for the Nationals? Round to three decimal places.

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Question 4 1 pts
Using the data, which of the following is the mean for the Astros?
Group of answer choices

44.650

45.632

27.518

41.000

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Question 5 1 pts
Using the data, which of the following is the variance for the Astros?
Group of answer choices

1253.684

1384.766

23820

35.553

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Question 6 1 pts
Using the data which of the following is standard deviation for the Astros?
Group of answer choices

36.270

38.763

35.407

37.212

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Question 7 1 pts
In general, why should we use the standard deviation rather than the variance?
Group of answer choices

The standard deviation is more frequently used in psychology than the variance, primarily because the standard deviation is better expressed in the same units as the original data set.

The standard deviation is the same as the mean.

The standard deviation is a measure of central tendency.

The standard deviation is a smaller number.

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Question 8 1 pts
Who seems to have more variability, the Astros or the Nationals?
Group of answer choices

Neither group show variability

Astros

Nationals

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Question 9 1 pts
Who has the higher mean?
Group of answer choices

Astros

Nationals

Neither group shows variability

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Question 10 1 pts
In general, why use the estimate of n – 1 rather than n in the computation of the standard deviation and variance?
Group of answer choices

The estimate n-1 is better because it is use for calculation of both the population and sample variance as well as standard deviation

n-1 provides an unbiased estimate of the population and allows more variability when using a sample and gives a better mathematical estimate of the population

The estimate n-1 is better because it is used for calculating the population variance and standard deviation

The estimate n-1 is never used to calculate the sample variance and standard deviation