1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vanyuwa [196]
3 years ago
14

On a baseball team, the ages of each of the players are as follows: 21; 21; 22; 23; 24; 24; 25; 25; 28; 29; 29; 31; 32; 33; 33;

34; 35; 36; 36; 36; 36; 38; 38; 38; 40 Use your calculator or computer to find the mean and standard deviation. Then find the value that is two standard deviations above the mean.
Mathematics
1 answer:
Paul [167]3 years ago
6 0

Answer:

Mean = 30.68

Standard deviation = 6.095

Two standard deviations above the mean = 42.87

Step-by-step explanation:

Given the following data :

21; 21; 22; 23; 24; 24; 25; 25; 28; 29; 29; 31; 32; 33; 33; 34; 35; 36; 36; 36; 36; 38; 38; 38; 40

Mean = Σ(x) / n

n = 25

Σ (X) = 767

Mean (m) = 767 / 25

Mean (m) = 30.68

Standard deviation : sqrt[Σ(x - m) / n]

Using a calculator :

Standard deviation = 6.095 ( 2 decimal places)

2 standard deviations above the mean :

Mean + 2(standard deviation)

Mean + 2(6.095)

30.68 + 12.19

30.68 + 12.19

= 42.87

You might be interested in
A car travels 30 miles in ½ hour. What is the average speed at which the car is traveling in miles per hour?
DochEvi [55]
The answer is 1 mile per hour
7 0
3 years ago
The value of digit 7 in 906.7
lara31 [8.8K]

The answer is tenths

Step-by-step explanation:

According to the place value chart of decimals,the first number after the decimal point starts from tenths and continues.so the answer is tenths

4 0
1 year ago
Read 2 more answers
What must happen for historians to consider a particular time in a civilzation a classical period?
Ksivusya [100]
The correct answer of the given question above would be option D. The thing that must happen for historians to consider a particular time in a civilization as a classical period is that, the civilization must make extraordinary achievements in areas such as art and science. 
5 0
3 years ago
Read 2 more answers
Which of the following statements is true of the correlation analysis? The null hypothesis for the Pearson correlation coefficie
ASHA 777 [7]

Answer:

In order to test the hypothesis if the correlation coefficient it's significant we have the following hypothesis:

Null hypothesis: \rho =0

Alternative hypothesis: \rho \neq 0

The statistic to check the hypothesis is given by:

t=\frac{r \sqrt{n-2}}{\sqrt{1-r^2}}

And is distributed with n-2 degreed of freedom. df=n-2=10-2=8

For this case the null hypothesis represent that we don't have association betwen the dependent variable Y and the independent variable X and that means r=0. So then the best option for this case is:

The null hypothesis for the Pearson correlation coefficient states that the correlation coefficient is zero

Step-by-step explanation:

Previous concepts

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.

And in order to calculate the correlation coefficient we can use this formula:  

r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}  

Solution to the problem

In order to test the hypothesis if the correlation coefficient it's significant we have the following hypothesis:

Null hypothesis: \rho =0

Alternative hypothesis: \rho \neq 0

The statistic to check the hypothesis is given by:

t=\frac{r \sqrt{n-2}}{\sqrt{1-r^2}}

And is distributed with n-2 degreed of freedom. df=n-2=10-2=8

For this case the null hypothesis represent that we don't have association betwen the dependent variable Y and the independent variable X and that means r=0. So then the best option for this case is:

The null hypothesis for the Pearson correlation coefficient states that the correlation coefficient is zero

4 0
3 years ago
With this information in mind, set up a proportion and use it to convert an angle of 225° into radians.
Ghella [55]
A 225 degree angle is equal to 3.92699 radians, but you can round that off to 3.93
4 0
3 years ago
Read 2 more answers
Other questions:
  • It is cloudy outside. <br><br> What is the first step of indirectly proving this statement?
    10·1 answer
  • Explain how you would use properties do you write an expression equivalent to 7y+4b-3y.
    13·1 answer
  • Who much time would it take for a train accelerating at 21.5 m/s2 to go from
    15·2 answers
  • What is 4=y−5 divided by 3
    10·1 answer
  • I need the answer help<br>​
    13·2 answers
  • On a family vacation, Amy's dad drove the car at a constant speed and traveled 585 miles in 13 hours. At this rate, how long wou
    8·1 answer
  • What is the volume of the box with a height of
    9·1 answer
  • 10 x 9= what is it help
    11·2 answers
  • Which equation describes a line parallel<br> to y= 4x+ 5 through point (-2, 1)?
    5·1 answer
  • Pls help its due today
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!