Natural Language processing

Read and implement the code in NLTK Ch 6, Section 1.3 “Document Classification”, which examines the sentiment analysis of movie reviews.

a) Using the movie review document classifier discussed in this chapter, generate a list of the 30 features that the classifier finds to be most informative. Can you explain why these particular features are informative? Do you find any of them surprising?

b) Word features can be very useful for performing document classification, since the words that appear in a document give a strong indication about what its semantic content is. However, many words occur very infrequently, and some of the most informative words in a document may never have occurred in our training data. One solution is to make use of a lexicon, which describes how different words relate to one another. In a paragraph, describe how you might utilize the WordNet lexicon for this problem to improve the movie review document classifier.  

) Illustrate and explain the impacts of a Central Bank reduction of its bank rate when an economy has a “liquidity trap” demand for money section.

b) Assume that an increasing number of supermarkets, shops and grocery stores accept credit and debit cards and more consumers use these cards to do their shopping. How will the money multiplier and money supply be affected?

1. Name a US government agency that publishes data of CPI and unemployment and provide a URL link for each of the two variables that leads you to the data.

2. Calculate the inflation rate between year a) 1999 and 2000, b) 2000 and 2001 given the following CPI:

CPI (1999)= 89, CPI (2000)=100, CPI (2001)=107

3. Suppose the nominal output of year 1999 was $3200 and the real output of year 1999 was $3600, calculate the GDP deflator of year 1999.

4. Suppose the CPI in Maryland is 110 and the CPI in Texas 1999 is 100 and you are given that the nominal income in Texas is $5000 while the nominal income in Maryland is $5100. Suppose you are given a job offer in each state. Which offer should you take if you are indifferent about the different environment in each state? Explain your answer thoroughly and include necessarily calculations or numbers.

5. Suppose the CPI of the US in 1990 was 120 and the CPI in 2003 was 200. For how much could a car that cost $20,000 in 2003 have been bought in 1990? Explain your answer thoroughly and include necessarily calculations or numbers.

6. If the real interest rate is 5% and inflation rate is 3 %, what is the nominal interest rate?

A uniform cylinder of radius R and mass M is mounted so as to rotate freely about a horizontal axis that is parallel to, and a distance h from the central longitudinal axis of the cylinder. (a) What is the rotational inertia of the cylinder about the axis of rotation? (b) If the cylinder is released from rest with its central longitudinal axis at the same height as the axis about which the cylinder rotates, what is the angular speed of the cylinder as it passes through its lowest position? State your answers in terms of the given variables, using g when appropriate.

In your large and randomly mating Angus herd, the locus B controls coat color and the locus H controls horn presence or absence. Black individuals are BB, or Bb and red individuals are bb. Horned individuals are HH or Hh and polled individuals are hh. In our herd, 70% of individuals are black and horned, 21% of individuals are black and polled, 5% of individuals are red and horned, and 4% of individuals are red and polled.

A) If you mate an individual with genotype Bbhh to another individual with genotype BbHh. Assuming locus B and locus H are independent, what is the probability of getting a black horned individual?

                     A. 3/8 B. 3/16 C. 9/16 D. 1/4

B) What do you expect the allele frequencies are in your population at both loci?

C) Do these traits in your population support or violate Mendel’s law of independent assortment? Justify your answer with the appropriate calculation.

D) What arrangement of the horned and coat color loci is more likely? Draw it on this homologous chromosome below.

E) Andrew is your favorite Angus bull, and you want to know if Andrew is a homozygote or a heterozygote in locus B. You mate it with one of his daughters having a black coat color. How many offspring would you need to produce to have a 99% probability of detection for the recessive allele b?

F) [TRUE/FALSE] You can be 100% sure that Andrew’s genotype is Bb if one of its offspring has red coat color.

QUESTION HAS ALL INFORMATION PROVIDED.

Festive Floral is gearing up for online carnation sales this Mother’s Day. They specialize in selling organic extra-large red and pink carnations. The price is $0.7 per stem, which includes free one-day shipping to the customer. Festive Floral pre-orders carnations directly from a certified organic farm at the cost of $0.15 per stem. The order is made prior to the growing season and flowers are grown accordingly, so the pre-order quantity cannot be changed. However, if Festive Floral runs out of pre-ordered carnations, they can always pick up more immediately from a local wholesaler that carries carnations of the same quality, at the price of $0.5 per stem. Historical demand for the past 10 years are given below.

Year: Red, Pink; 2008: 4008, 3288; 2009: 3948, 3648; 2010: 4092, 3636; 2011: 3984, 3684; 2012: 3996, 3792; 2013: 3888, 3720; 2014: 4128, 3564; 2015: 4104, 3744; 2016: 4380, 3828; 2017: 4392, 3744

For all questions below, please round your answers to two decimal points. Show your work by explaining the steps of your calculation.

(a) Using exponential smoothing with parameter ?? = 0.9, what is your forecast for red carnations in 2018? What is the MAD of your forecast?

(b) Based on the forecast above, what is the optimal number of red carnations to pre-order from the farm?

(c) Repeat Parts (a) and (b) for pink carnations.

As carried out in Section A, a 20 cm³ aliquot of a 0.0513 mol dm^-3 vanadium(V) solution wasreduced by excess zinc metal to an unknown oxidation state (x). The resulting lavender (lilac) coloured solution was then fully reoxidised by 32.3 cm³ of a 0.0199 mol dm^-3 KMnO₄solution.

Calculate the experimental value for the unknown oxidation state x (to two decimal places)

As carried out in Section A, a 20 cm³ aliquot of a 0.0575 mol dm^-3 vanadium(V) solution wasreduced by excess zinc metal to an unknown oxidation state (x). The resulting lavender (lilac) coloured solution was then fully reoxidised by 32.5 cm³ of a 0.0199 mol dm^-3 KMnO₄solution.

Calculate the experimental value for the unknown oxidation state x (to two decimal places)

In Python

A child is required to use a booster seat in a car until the child is 9 years old, unless the child reaches the height of 59 inches before age 9. Which expression can be used to decide if a child requires a car seat or not?

What conditions have to be true to make the following code display "B"?

if color == 'red':
    if style < 3:
        print('A')
    elif style < 5:
        print('B')
    else:
        print('C')
elif color == 'blue':
    print('D')

What conditions have to be true to make the following code display "B"?

if color == 'red':
    if style < 3:
        print('A')
    elif style < 5:
        print('B')
    else:
        print('C')
elif color == 'blue':
    print('D')

Which statement is equivalent to the following assignment?

x -= 2 + y

Which of the following data values is best represented with a floating point variable?