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Monday, October 30, 2017

Practice Quiz with Answers Statistics College Edition


Practice Quiz Statistics College Edition



MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.

Determine whether the given value is a statistic or a parameter.


1.) After inspecting all of 55,000kg of meat stored at the Wurst Sausage Company, it was found that 45,000 kg of the meat was spoiled.



_____B_




A) Statistic

B) Parameter



2.) Determine whether the given value is from a discrete or continuous data set.



The temperature of a cup of coffee is 67.3°F.


___A___

 


A) Continuous


B) Discrete



3.) Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate.


Survey responses of "good, better, best".


___D___



A) Interval

B) Ordinal

C) Ratio

D) Nominal



4.) Identify which of these types of sampling is used: random, stratified, systematic, cluster, convenience.


A market researcher selects 500 people from each of 10 cities.


_A_____




A) Cluster

B) Random

C) Stratified

D) Systematic

E) Convenience



5.)Provide an appropriate response.
  
An education expert is researching teaching methods and wishes to interview teachers from a particular school district. She randomly selects ten schools from the district and interviews all of the teachers at the selected schools. Does this sampling plan result in a random sample? Simple random sample? Explain.
 
____B__


No; yes. The sample is not random because teachers in small schools are more likely to be selected than teachers in larger schools. It is a simple random sample because all samples have the same chance of being selected.


B)

Yes; yes. The sample is random because all teachers have the same chance of being selected. It is a simple random sample because all samples have the same chance of being selected.
 

C)


No; no. The sample is not random because teachers in small schools are more likely to be selected than teachers in larger schools. It is not a simple random sample because some samples are not possible, such as a sample that includes teachers from schools that were not selected.


D)

Yes; no. The sample is random because all teachers have the same chance of being selected. It is not a simple random sample because some samples are not possible, such as a sample that includes teachers from schools that were not selected.



6.) ESSAY.  Write your answer in the space provided or on a separate sheet of paper. You will need to show your work on these problems!


Last year nine employees of an electronics company retired.  Their ages at retirement were:
B


56   65   62
53   68   58
67   52   56

a)  Find the Mean retirement age.  _59.67____

b)  Find the Median.     _58____

c)  Find the Midrange.  __60___

  

7.)Find the variance for the given data. Round your answer to two decimal places.
           Be sure to show ALL work and calculations!


a)    18   16   12   2   11
 

___B_


1.) 38.10
2.) 30.62
3.) 38.20
4.) 6.18



b)    Find the standard deviation for these data.   _ Variance = 38.20; SD = 6.18 __ .
work:

values

dev. from mean
dev. Squared


18

6.2
38.44


16

4.2
17.64


12

0.2
0.04


2

-9.8
96.04


11

-0.8
0.64

Mean =
11.8

0
38.20
Variance




6.18
SD



8.)Determine which score corresponds to the higher relative position.

Which is better: a score of 82 on a test with a mean of 70 and a standard deviation of 8, or a score of 82 on a test with a mean of 75 and a standard deviation of 4?  Show all work!

_(82-75)/4=1.75=z

Work:
(82 – 70)/8 = 1.5 =z(82 – 75)/4 =1.75 = z     The larger z score is better.




9.)Use the given sample data to find Q3.  Always show your calculations!

                49   52   52   52   74   67   55   55

Work:

49   52 52  52  55  55  67  74   Answer is (55 + 67)/2 = 61, which reflects the Median of the upper half of the scores.



__c_____




A) 55.0

B) 6.0

C)61.0

D)67.0





10. ) The test scores of 40 students are listed below. Find P56.  Please show all work!                    10)_23rd_____

                30   35   43   44   47   48   54   55   56   57
                59   62   63   65   66   68   69   69   71   72
                72   73   74   76   77   77   78   79   80   81
                81   82   83   85   89   92   93   94   97   98

Work:

P56 = 40*56/100 = 22.4 as the 23rd position; a 74 is in the 23rd position.


















Monday, October 23, 2017

2 Case Examples w/ Structure of the Juvenile Justice System



Structure of the Juvenile Justice System

Tom Jones is a sixteen-year-old repeat juvenile offender who has just been detained by the police for attempted murder.


To begin with, now that law enforcement has Jones in th6eir custody, because he is a repeat offender, they will take their time processing him. Why? This is in hopes of annoying the offender, and maybe this will instill in said persons mind that disobeying the law is unsatisfactory. While the offender is being processed, the parents or guardians will be notified. 

After the offender has been processed, Mr. Jones will be detained into a detention center so that he can be prosecuted. At this time, his Attorney, and representative on his behalf will meet with him, and attempt to get his version of the story, and see if there is a bail hearing. Jones Attorney will meet with the Prosecutor and see if they can work out a diversion, or some kind of lower sentence, or plea. The chances that Jones will get to see his family before court are slim to none, unless it is by way of a TV screen. 

Under the Prosecutors discretion, he will then transfer the case through the Criminal Justice system, by way of Juvenile Court intake system, because of Jones age. During this time, Jones is still being held in detention, and still being questioned, and as well as decided if he is in the right frame of mind, and what caused him to actually attempt to murder someone. 

After speaking with Jones, decisions will be made if he should be given diversion or prosecuted. At this point he is given a formal processing, which can result in a judicial waiver, or a dismissal. Jones, being that he is sixteen, has a chance of being waived into the adult court system, should the Judge see fit, because it is attempted murder. The Judge must thoroughly read over the case, and the circumstances, and decide what road he should take. 

Because Jones is a repeat offender, and is sixteen, I would waive him over to the adult system. If you want to act like an adult and attempt to take a person’s life, then in this case, we will treat you like one. Therefore, the Judge decided to enact his ruling with a Judicial waiver and place sixteen-year-old Tom Jones back into the Criminal Justice system and try him as an adult. 

At this point the system will argue that he is a minor, and he is not capable of handling himself in the adult system, but the Judge responded with, “He should’ve thought of that when he tried to kill so and so.” And banged his gavel. 


Once in the criminal justice system as an adult, Tom Jones is no longer protected, and he can now be tried as adult. However, that is not what the Judge wants in this case. All he wants is simple. He wants to give Tom Jones six months, without parole in an adult facility, and then one year on adult probation. He then wants him to return to School, or obtain a G.E.D. if Jones gets a G.E.D. he wants him to obtain a job immediately after that. After sentencing the Judge says to Jones, “I don’t want to see you again.”


Jennifer Smith is a fifteen-year-old first-time offender who has just been detained by the police for vandalism.

Once detained, the officers in question called Miss Smiths parents. While they were trying to get a hold of her parents, Miss Smith is shaking and crying. It was and is her first time acting out, and she was only trying to make new friends, and following along with the peer pressure. She was sick and tired of being bullied, and was convinced this would stop it, if she followed along, Instead, when the cops pulled up, they all ran away laughing, leaving her to get caught. 

The Police could not get Smith to calm down, no matter how much they tried, and unfortunately, no one was home to answer the phone either, so they were forced to detain her in the detention center until a parent or guardian could be reached. 

Because of the fact of the situation, the officers had planned on letting Smith go with a warning. But, no one could be reached. So, this turned out worse than anyone, even law enforcement had planned. However, there is an advantage to this scenario. 

While in detention, the Prosecutor read the report, and knew that the parents and/or guardians had been tried to be contacted. The prosecutor tried as well. As did the court appointed Attorney. The report from the Arresting officer said in detail, “I had no intention of making an arrest. However, parents and/or guardians could not be reached, and my hands were tied on this matter.”

The Prosecutor under discretion, referred the case to through the Criminal Justice System, and sent it onto Juvenile Court intake. The representative on Smith’s behalf, and her court appointed Attorney showed up together. Smith was still upset and crying, and shaken. She explained the scenario to everyone, and the two read the report from the officer. Smith was informed she wasn’t even supposed to be there, but no one could reach her parents. Now they wanted to know if there was anyone else they could get a hold of. Smith lowered her head to the table and bawled. Everyone was stunned. 

The Attorney and several case workers decided to check out the residence where Smith lived. The mail had been stacking up the whole time Smith had been in custody. No one was home, and there were no cars in the drive. They decided to speak with the neighbors, and were enlightened with the results. 

No one ever saw anyone come or go other than Jennifer Smith. They watched her come and go to School every day. They would watch her come and go with groceries from the store too, never did they ever see anyone else. She was always quiet, never played her music loud, never had any company either. 

The Attorney met with the prosecutor who explained their findings, together they looked up the birth records of Jennifer Smith, only to learn that she was collecting death benefits from both of her parents who had been killed. Jennifer Smith was living alone, on her own successfully at the age of fifteen, and no one knew it, and somehow the system never recognized it.

Together the prosecutor and Attorney met with Jennifer Smith and they wanted answers. They explained what they had learned. Smith looked at them and said, “My Aunt was supposed t be taking care of me. She did for several months. Then she met a guy, and he said he didn’t want the burden of me. They left, and that’s all I know. That was six years ago. Fortunately, before she left, she started a bank account for me, so I could do my own banking, and handle my own money. The house is paid for in the settlement. I do just fine. I keep my grades up! This was my first mistake! I don’t need anyone!” She cried out. 

The Prosecutor and the Attorney both went to the Judge with everything they had learned, and the case was dismissed. The Judge had given Miss Smith a financial burden waiver, so no fees were instituted on her for the time she was put into detention. He also assigned her a representative to assist her with her needs and help her with anything and everything that she needed, and home care was assigned to her, as well as health care.










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