1. If the arithmetic mean of 7,9,11,13, x, 21 is 13,find the value of x. 2. The mean of 24 numbers is 35. If 3 is added to each number, what will be new mean.? 3. The mean of 20 numbers is 43. If 6 is substracted from each of the numbers,what will be new mean? 4. The mean of 15 numbers is 27. If each numbers is multiplied by 4,what will be new mean? 5. The mean weight of 6 boys in a group is 48 kg. The individual weights of five of them are 51kg, 45kg, 49kg, 46kg, and 44kg. Find the weight of the sixth boy. 6. The mean of the marks scored by 50 students was found to be 39. Later on it was found that a score of 43 was misread as 23. Find the correct mean. 7. The mean of 100 items was found to be 64. Later on it was found that two of the items were misread as26 and 9 instead of 36 and 90 respectively. Find the correct mean. 8. A cricketer has a mean score of 58 runs in 9 innings. Find out how many runs are to be scored by him in the tenth innings to raise the mean score to 61. 9. The mean of 25 observations is 36. If the mean of the first 13 observations is 32 and that of the last 13 observations is 39, find the 13th observation. 10. A batsman in his 12th innings makes a score of 63 runs and thereby increase his average score by 2, what is his average after the 12th innings ? 11. The mean of 31 observations is 60. If the mean of the first 16 observations is 58 and that of the last 16 observations is 62, find the 16th observation.
12. The heights of 72 plants in a garden are given below : Heights(in cm) 58 60 62 64 66 68
No. of plants 12 14 20 13 8 5
Find the mean height per plant.
13. The mean of the following data is 21.6. find the value of p. X 6 12 18 24 30 36
F 5 4 p 6 4 6

14. The mean of the following data is 1.46. find the value of missing frequencies. No of accidents(x) 0 1 2 3 4 5...
...4 
Pensylvania 6 3 4 
Ho: Account balances are independent of branch.
H1: Account balances are independent of branch
Test Statistic:
Chi square is given by (Oi – Ei)^2 / Ei ~ χ2 with 2*3= 6 degrees of freedom
The calculated value of chisquare is 11.89625
Critical value for 5% level of significance is 12.5916
Since the calculated value is...
...survey just them.
You can then draw conclusions about how the entire population would respond based
on the responses from this randomly selected group of people.
This is exactly what political pollsters do  they ask a group of people a list of questions
and based on their results, they draw conclusions about the population as a whole with
those often heard disclaimers of "plus or minus 5%"
If your population consists of just a few hundred people, you might find that you...
...analysis, other decision making techniques are discussed. These techniques
include decision analysis, 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...
...Trajico, Maria Liticia D.
BSEd IIIA2
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...
...
ANALYSIS
Physics has a lot of topics to cover. In the previous experiments, we discussed Forces, Kinematics, and Motions. In this experiment, the focus is all about Friction. Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction like fluid friction which describes the friction between layers of a viscous fluid that are moving relative to each other; dry friction which...
...
The case between Beauty and Stylish involves concept of a valid contract, precontractual statements, express term and misrepresentation.
A valid contract is established between Beauty and Stylish when an offer is accepted and there is intention for both parties to create legal relations. An offer refers to the expression of willingness of the offerer to be contractually bound by an agreement if his or her offer is properly accepted. It has to be clear and certain in terms. It must also...
...QUESTION 21
The finishing process on new furniture leaves slight blemishes. The table below displays a manager's probability assessment of the number of blemishes on one piece of new furniture.
Number of Blemishes
0
1
2
3
4
5
Probability
0.34
0.25
0.19
0.11
0.07
0.04
1. On average, how many blemishes do we expect on one piece of new furniture?
2. What is the variance of blemishes on one piece of new furniture? (round to the nearest hundredth) ...