+1-415-670-9189
info@expertsmind.com
Generate descriptive statistics
Course:- Basic Statistics
Reference No.:- EM13398




Assignment Help
Expertsmind Rated 4.9 / 5 based on 47215 reviews.
Review Site
Assignment Help >> Basic Statistics

Question 1

The subsequent set of data is the mark for 30 students in a final exam.

142_Generate descriptive statistics.png

(a) Use SPSS commands: Analyze -> Descriptive Statistics -> Explore  to:

(i) Prepare descriptive statistics.   

(ii) prepare a stem-and-leaf plot of the data.

(iii) prepare a box plot of the data.

(b) Briefly comment on what the plots reveal.

Question 2

The literary styles of different authors will vary widely. In particular, one factor that can differ is the word length of sentences. Using either a library or your own bookshelf, select two (fiction) novels of a reasonable length, written in English and by two different authors.

For each of the chosen sentences record the measurements on the following variables:

Page Number: the page number that the sentence appeared on.

Number Words: the number of words in the sentence.

Number Letters: the number of letters in the sentence.

Repeat this process for your second novel. Do not list the data in your assignment solutions yet - this will be done in (e).

(c) Enter the data collected in (b) into an Excel spreadsheet. You will need two separate tables - one for each novel. Each table should be titled  with the name and author of the novel and include all data collected for each sentence. Do not print out the spreadsheets yet.

(d) On your spreadsheet, add two new variables: Word Length - the average number of letters per word, and Word Density - a variable that classifies sentences as either "Low", "Medium" or "High" density depending on whether they have an average word length of less than 4.0 letters, at least 4.0 letters but less than 5.0 letters, or at least 5.0 letters respectively. Add the values of the new variables to your table for each question. Do not print out the spreadsheets yet.

(e) Following the guidelines for tabular presentation, redraw the above tables.  Assume that we are primarily interested in the columns Word Length and Word Density.

Notes: Do not round the measurements for Page Number, Number Words and Number Letters. You MUST use Excel to draw the table.

(f)  By hand, draw side-by-side dot plots of the word lengths for the two novels.

(g) Using your answers for (f), in plain English, compare the word lengths of the two novels.

(h) Either using Excel or SPSS, use an appropriate exploratory tool to display the relationship between the variables Word Length and Number Words for your second novel. Comment on what this display shows.

Question 3
 
The Roller Coaster Database is a website that contains a database of all the roller coasters in the world. Information on steel tracked roller coasters was taken from the latest census of operating roller coasters. Coasters were classified by the region they were in and the type - Inverted, sit-down or other (which included pipeline, bobsled, flying, stand-up, suspended and 4th dimension coasters).

2468_Generate descriptive statistics1.png

Use the table to answer the following questions about these roller coasters.

(a) What proportion of steel tracked roller coasters are in Asia?

(b) What region has the highest proportion of inverted steel tracked roller coasters?

(c) Given that a steel tracked roller coaster is in Europe, what is the probability that it is sit down?

(d) What proportion of European steel tracked roller coasters are sit down?

(e) Of all sit down steel tracked roller coasters, what proportion are in Europe




Put your comment
 
Minimize


Ask Question & Get Answers from Experts
Browse some more (Basic Statistics) Materials
A marketing firm asked a random set of married and single men as to how much they were willing to spend for a vacation. At  *alpha*= .05, is a difference in the two amounts
Suppose that you have 10 observations that have a mean of 7, a median of 6, and a standard deviation of 3. If you halve the value of each observation, what are the new value
Determine the upper and lower control limits for ?- (This Symbol Is Supposed to be an x not an a) and R-charts for the width of a chair seat when sample grand mean
Suppose the eight patients last names start with the letters A to H. Using the random numbers listed below, show which patients you will assign to each treatment. Explain yo
Assume sps professors have the average life normally distributed of 82 years, with population standard deviation of 5 years. Determine percent of sps professors will not live
Probability using Pareto chart - Evaluate the probability of randomly selecting an adult from the sample who doesn't always eat healthy foods because he or she has no time to
Samples of size 49 are taken from a population with a σ of 17. If the mean of the sample is 25, what is the confidence interval at the 90% confidence level
A random sample of 15 Golden Retrievers has an average weight of 66 lb. The percentile rank of this sample is: A.85. B.10. C.90. D.80. E.93.