3. The claim is that the mean height of men is 174.1 cm.  Develop the outline for a hypothesis test for this claim

Part I. State the conditions that must be met

Part II. A formal statement of the null hypothesis

Part III. A formal statement of the alternative hypothesis

Part IV. List the possible conclusions concerning the alternative and null hypothesis.

Part V. Is it possible to conclude that “there is sufficient evidence to support the claim that the mean height of men is 174.1 cm”?

Racket/Scheme language

[15p] create-mapping A map data structure is described as either a set of key-value pairs or a set of keys and a set of values whose relation is described by a function with a one-to-one mapping from keys to values. Write a function, create-mapping, which takes a list of symbols (keys) and a list of any type of Scheme values (vals) and returns a function that takes one symbol argument (the key) and returns the corresponding value. The mapping is determined by the position of the elements in the two lists.

For example: ;keys > (define roman-numerals-keys '(I II III IV V)) ;values > (define arabic-numerals-vals '(1 2 3 4 5)) ;

The pairs mapped will be: ;I -> 1 ;II -> 2 ;III -> 3 ;and so forth ;the (create-mapping) function returns a function that we bind for later use > (define roman-to-arabic (create-mapping roman-numerals-keys arabicnumerals-vals)) > (roman-to-arabic 'I) 1 > (roman-to-arabic 'V) 5 > (roman-to-arabic 'some-symbol) uncaught exception: "Could not find mapping for symbol 'some-symbol" ;hint: create the error message in a similar way you did for problem 14 of hw01.

A previous group of students wanted to investigate the factors that contribute to female fecundity (total number of eggs a female lays).  They wondered if the female’s body weight might play a role.  The students collected and weighed 15 newly-emerged virgin female bean beetles.  Each female was mated and given plenty of black-eyed peas on which to lay eggs.  Each day the students checked the beans for eggs, counted the number of eggs, and gave the female fresh beans.  When the female died, the students added up the total number of eggs each female laid.

1. What is the independent variable?  What are the potential values for this variable? What is the dependent variable?  What are the potential values for this variable?
2. What are the study subjects?  Be specific!
3. What might be the researchers’ hypothesis?
4. What type of scientific study did the researchers conduct?
5. If this study is an experiment, what are the treatments?  Label the treatments as either experimental or control.
6. What was the sample size of this study?
7. List three potentially confounding variables that were or should have been controlled in this study.

a. Consider the following distribution of a random variable X

                Find the mean, variance and standard deviation

b. There are 6 Republican, 5 Democrat, and 4 Independent candidates. Find the probability the committee will be made of 3 Republicans, 2 Democrats, and 2 Independent be selected?

c. At a large university, the probability that a student takes calculus and is on the dean’s list is 0.042. The probability that a student is on the dean’s list is 0.21. Find the probability that the student is taking calculus given that the student is on the dean’s list.

d. In a statistics class there are 16 juniors and 12 seniors; 8 of the senior students are females, and 12 of the juniors are males. If a student is selected at random, find the probability that the student is neither a junior nor a male.

Two types of survey questions are open questions and closed questions. An open question allows for any kind of? response; a closed question allows for only a fixed response. An open question and a closed question with its possible choices are given below. List the advantages and disadvantages of each question.

Open? question: What can be done to get students to eat healthier? foods?

Closed? question: How would you get students to eat healthier? foods?

1. Mandatory nutrition course

2. Offer only healthy foods in the cafeteria and remove unhealthy foods

3. Offer more healthy foods in the cafeteria and raise the prices on unhealthy foods

As the head of the local Criminal Justice Dept. You have been tasked to write changes to departmental policy because of a recurring problem involving students failing to appear in class or appearing late in class. The dean has complained to you because he thinks attending class is a low priority for you students. Using cause and effect determine the possible causes for the late and missed classes. List the possible causes under the headings below

Machines

1

2

3

4

5

People

1

2

3

4

5

Materials

1

2

3

4

5

Methods

1

2

3

4

5

consider the victoria university information technology department, department has setup a small library for NIT5130 students. The department library maintains a checkout list ( CALL NO, USER ID, DATE REQUESTED) of all the books borrowed by students, Every student record consists of User ID, User name, Borrow limit, Number checked out, and fines. Suppose that the library will have multiple copies (CALL NO, AUTHOR NAME, PUBLISHER, ISBN, DATE PUBLISHED) can have multiple authors (AUTHOR NAME, DATE OF BIRTH, COUNTRY OF BIRTH, DECEASE BIRTH). You have volunteered to set up a database system for the library,

Draw an Entity relationship diagram for the IT department library