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Assignment 3

1.Exercise 4.1 A survey was conducted in Professor Lamm’s class and Professor Milner’s class. The question that students responded to is, “How many siblings do you have?” Data set: Ch 04 – Exercise 01.sav Codebook Variable: class Definition: Class designation Type: Categorical (1 = Prof. Lamm, 2 = Prof. Milner) Variable: siblings Definition: Number of siblings Type: Continuous

a) Run descriptive statistics and a histogram with a normal curve for siblings for the whole data set. Paste the histogram and descriptive statistics

b) Run descriptive statistics and a bar chart for class for the whole data set. Paste the bar graph and descriptive statistics

c) Run descriptive statistics and a histogram with a normal curve for siblings for members of Professor Lamm’s class only. Past the histogram with the normal curve.

d) Run descriptive statistics and a histogram with a normal curve for siblings for members of Professor Milner’s class only. Past the histogram with the normal curve.

e) Summarize in a few well-written sentences totaling 50 words or less what you found out about the two classes

2. Exercise 4.2 While waiting in line to donate blood, donors were asked, “How many times have you donated before?” The researcher recorded their gender and number of prior donations. Data set: Ch 04 – Exercise 02.sav Codebook Variable: gender Definition: Gender Type: Categorical (1 = Female, 2 = Male) Variable: donated Definition: Total number of blood donations given before today Type: Continuous

a) Run descriptive statistics and a histogram with a normal curve for donated for the whole data set. Paste the histogram with normal curve and descriptive statistics

b) Run descriptive statistics and a bar chart for gender for the whole data set.

c) Run descriptive statistics and a histogram with a normal curve for donated for women only. Paste the histogram with normal curve and descriptive statistics

d) Run descriptive statistics and a histogram with a normal curve for donated for men only. Paste the histogram with normal curve and descriptive statistics

e) Summarize in a few well-written sentences totaling 50 words or less what you found out about the donations.

3. Exercise 4.3 You want to know if typing proficiency is associated with better spelling skills. You administer a spelling test consisting of 20 words to the students in a classroom. At the bottom of the sheet, there is a question: “Can you type accurately without looking at the keyboard?” Data set: Ch 04 – Exercise 03.sav Codebook Variable: looker Definition: Does the student look at the keyboard to type? Type: Categorical (1 = Looks at keyboard, 2 = Doesn’t look at keyboard) Variable: spelling Definition: Score on spelling test Type:

a) Continuous Run descriptive statistics and a histogram with a normal curve for spelling for the whole data set. Paste the histogram with normal curve and descriptive statistics

b) Run descriptive statistics and a bar chart for looker for the whole data set.

c) Run descriptive statistics and a histogram with a normal curve for spelling for “looks at keyboard” only. Paste the histogram with normal curve and descriptive statistics

d) Run descriptive statistics and a histogram with a normal curve for spelling for “doesn’t look at keyboard” only. Paste the histogram with normal curve and descriptive statistics

e) Summarize in a few well-written sentences totaling 50 words or less what you found out about

4. Exercise 4.4 You are interested in the length of time it takes for individuals to complete their transaction(s) at an ATM. You use a stopwatch to record your unobtrusive observations and gather two pieces of information on each person: gender and the length of his or her ATM session (in seconds). Data set: Ch 04 – Exercise 04.sav Codebook Variable: gender Definition: Gender Type: Categorical (1 = Female, 2 = Male) Variable: atmsec Definition: Number of seconds spent at ATM Type: Continuous

a) Run descriptive statistics and a histogram with a normal curve for atmsec for the whole data set. Paste the histogram with normal curve and descriptive statistics

b) Run descriptive statistics and a bar chart for gender for the whole data set.

c) Run descriptive statistics and a histogram with a normal curve for atmsec for women only. Paste the histogram with normal curve and descriptive statistics

d) Run descriptive statistics and a histogram with a normal curve for atmsec for men only. Paste the histogram with normal curve and descriptive statistics

e) Summarize in a few well-written sentences totaling 50 words or less what you found out about

5. Exercise 4.5 You are interested in finding out how many units students are enrolled in. You conduct a survey of 40 students and record two pieces of information: the degree (level) the students are working on (bachelor’s, master’s, doctorate) and the total number of units they are taking this term. Data set: Ch 04 – Exercise 05.sav Codebook Variable: degree Definition: Highest degree the person has Type: Categorical (1 = Bachelor’s, 2 = Master’s, 3 = Doctorate) Variable: units Definition: Current number of enrolled units Type: Continuous Run descriptive statistics and a histogram with a normal curve for units for the whole data set.

a) Run descriptive statistics and a bar chart for degree for the whole data set.

b) Run descriptive statistics and a histogram with a normal curve for units for bachelor’s degree only. Paste the histogram with normal curve and descriptive statistics

c) Run descriptive statistics and a histogram with a normal curve for units for master’s degree only. Paste the histogram with normal curve and descriptive statistics

d) Run descriptive statistics and a histogram with a normal curve for units for doctorate only. Paste the histogram with normal curve and descriptive statistics

e) Summarize in a few well-written sentences totaling 50 words or less what you found out about the students.

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