Ch. 7 Pr. 1
For a population containing N=902 individuals, what code number would you assign for; a. The first person on the list= 001
b. The fortieth person on the list= 040
c. The last person on the list= 902

Ch. 7 Pr. 13
What additional information would you want to know about the survey before you accepted the results of the study? -Why was the study conducted? –What was the margin of error? –What was the sample size? -What sampling design was used? –What was the response rate? –What was the frame that was used? -Who paid for the survey? –From the sample that was selected, what was the population? Ch. 7 Pr. 17

For each of the following three populations, indicate what the sampling distribution for samples of 25 would consist of: a. Travel expense vouchers for a university in an academic year. -The sampling distribution of a sample means is the distribution of means from all possible samples of 25 vouchers that could possibly happen. Ch. 7 Pr.24

A random sample of 50 households as selected for a telephone survey. The key question asked was, “Do you or any member of your household own a cellular telephone with a built in camera?” Of the 50 respondents, 15 said yes and 35 said no. a. Determine the sample proportion, p, of households with cellular telephones with built-in cameras. P=x/n

P=15/50=0.30
-30% of the households surveyed had cell phones with cameras.
b. If the population proportion is 0.40 determine the standard error of the proportion.

-We can use the standard normal curve for binomial data in cases where we have a big sample.

Ch. 7 Pr. 33
Why is the sample mean an unbiased estimator of the population mean? -The sample mean is an unbiased estimator of the population means due to the average of all of the possible sample means of a size is equal to the population mean. Ch. 7 Pr. 34

Why does the standard error of the mean decrease as the sample size, n, increases? -Variation of the sample means becomes smaller...

...Worksheet 7-A: Metabolism Exercises
Name __ _________________________
Metabolism explains how the cells in the body use nutrients to meet its needs. Cells may start with small, simple compounds and use them as building blocks to form larger, more complex structures (anabolism). These anabolic reactions involve doing work and so require energy. Alternatively, cells may break down large compounds into smaller ones (catabolism). Catabolic reactions usually release energy....

...TCO 1) What is the purpose behind the five primary activities in the value chain?
First, info flow diagrams and flowcharts argon the two most much utilize development and musical accompaniment tools employ today. Second, since systems developme nt is super complex, DFDs and flowcharts ar! e tools that are used to fix order from sanatorium and complexity.Â (Ch 3, p. 50)| | | Â | Points Received:| 4 of 5| Â | Comments:| First, data flow diagrams and flowcharts are the two most frequently used...

...modes for the following samples:
(i) 7, 4, 6, 2, 6, 7, 3, 5
(ii) 0, -3, 5, -2, -6, 4, 7, 9, 4, -3, 0, 2
b. The number of days for which each of 15 office workers of a firm was absent during a one-month period is as sfollows:
0, 1, 1, 3, 0, 0, 2, 5, 0, 1, 1, 2, 0, 1, 1
Calculate the interquartile range, variance and standard deviation of the number of days absent.
2. The number of hours a student spent studying for a...

...project scheduling and network models.
Chapter 1 illustrates a number of ways to summarise the information in data sets, also known as
descriptive statistics. It includes graphical and tabular summaries, as well as summary measures
such as means, medians and standard deviations.
Uncertainty is a key aspect of most business problems. To deal with uncertainty, we need a basic
understanding of probability. Chapter 2 covers basic rules of probability...

...
Contents
Question 1 3
Question 2a 5
Question 2b 6
Question 2c 7
Question 3a 8
Question 3b 8
Question 3c 10
Question 3d 11
Question 4 12
Question 5 14
References 15
Question 1
The sampling method that Mr. Kwok is using is Stratified Random Sampling Method. In this case study, Mr Kwok collected a random sample of 1000 flights and proportions of three routes in the sample. He divides them into...

...Trajico, Maria Liticia D.
BSEd III-A2
REFLECTION
The first thing that puffs in my mind when I heard the word STATISTIC is that it was a very hard subject because it is another branch of mathematics that will make my head or brain bleed of thinking of how I will handle it. I have learned that statistic is a branch of mathematics concerned with the study of information that is expressed in numbers, for example information about the number of times...

...Durbin-Watson statistic are A. any value B. any value greater than zero C. any value from 0 to 4 inclusive D. any value less than zero. 5. A question has these possible choices—excellent, very good, good, fair and unsatisfactory. How many degrees of freedom are there using the goodness-of-fit test to the sample results? A. 0 B. 2 C. 4 D. 5
6. What is the critical value at the 0.05 level of significance for a goodness-of-fit test if there are six categories? A. 3.841 B. 5.991...

...averages last year is an example of what type of statistics? Determining the averages they can expect next year is an example of what type of statistics?
A. They are both examples of inferential statistics because averages are inferred in both instances.
B. Inferential statistics; descriptive statistics.
C. They are both examples of descriptive statistics because they deal with analyzing data.
D....