A popular American television sports program conducts a poll of viewers to see which team they believe will win the NFL (National Football League) championship this year. The manager of a department store decides to measure employee satisfaction by selecting four departments at random, and conducting interviews with all the employees in those four departments.

Describe how the chance of being selected will change over the course of drawing the sample.ġ5. A manager wants to draw a sample, without replacement, of 30 employees from a workforce of 150. Describe how you might draw a stratified sample of students from a college, where the strata are the students’ class standing (freshman, sophomore, junior, or senior).ġ4. Describe how you might draw a random sample of 30 students from a lecture class of 200 students.ġ3. What proportion of nurses have ten or fewer years of experience?ġ2. What proportion of nurses have five or more years of experience?ġ1. Fill in the blanks in the table and round your answers to two decimal places for the Relative Frequency and Cumulative Relative Frequency cells.ġ0. Their answers are summarized in the following (incomplete) table.ĩ. A survey of a random sample of 100 nurses working at a large hospital asked how many years they had been working in the profession. Use the following information to answer the next three exercises. concerning their plans for future education and employment, and found that 50 percent were planning to attend a 4-year college or university in the following year. federal government had the means to survey all high school seniors in the U.S. Fifty percent answer yes to this question that fifty percent is a:Ĩ.

One question asks whether they are planning to attend a four-year college or university in the following year. federal government conducts a survey of high school seniors concerning their plans for future education and employment. Describe a situation in which you would calculate a parameter, rather than a statistic.ħ. “Number of visits per week” is what kind of data?Ħ. What kind of a sampling design is this?ĥ. They decide to ask every tenth customer on a specified day to complete a short survey including information about how many times they have visited the club in the past week.Ĥ. A health club is interested in knowing how many times a typical member uses the club in a week. Use the following information to answer the next two exercises.

This is an example of a:ġ.2: Data, Sampling, and Variation in Data and Sampling The study finds that the mean amount spent on produce per visit by the customers in the sample is $12.84. What kind of data is “amount of money spent on produce per visit”?ģ. Identify the population, sample, parameter, statistic, variable, and data for this example.Ģ. Using their store records, they draw a sample of 1,000 visits and calculate each customer’s average spending on produce.ġ. A grocery store is interested in how much money, on average, their customers spend each visit in the produce department.

The data describes for each particle how many neighbours I have,what I wish to do is represent this data in histogram so that one can visualize easily how many time I have 6 neihbours how many times 4 ,5 ,7 ,8.sure it's hard for me to read between the lines and see how many 6 or X number do I have if anyone can help to suggest a way to represent and quantify these data in a histogram I'd be thankfulĮDIT: Answer below for histogram generation with percentages.Practice Test 1 1.1: Definitions of Statistics, Probability, and Key Terms I've done the nearest neighbour program in matlab for 547 points and I result with a cell array of size here are the data:

Matlab histogram