Homework

1, A school board wants to determine the effectiveness of a teacher. The information presented on behalf of the teacher is student retention, students' completion and the students pass rate of a standardized test. The school board is using what kind of statistics? --------------

2, The data of statistics can be classified into two classes.Name the two classes. ---------------- and -------------------

3, A student wants to find the pizza preference of faculty, students, and staff at Wisdom Academy. There is only one campus. What is the best sampling technique should the student use? ------------------

4, What is the difference between a Parameter and a statistic? ------------

5, A student current GPA is 3.74 with 56 attempted hours. The students registered four three-hour credit classes. The students are expecting to obtain three A and a B as a final grade. On a four-point grading system what would be the new GPA. --------------

6, Below is a printout for a data

N =30

Mean = 65,

SD =12,

Df= 29

Median= 55,

Q1= 23,

Q3= 78

Lowest= 19

Highest= 125

Which these information gives you an accurate measure of the central tendency of the data Mean? ------

7, The mean and standard deviation of a a population is given as mean 108 and standard deviation is 15. Using this information and the Central Limit Theory what will be the standard deviation of a sample of size 12 (correct to two decimal place) -------------

8, In a left skewed distribution put in ascending order the position of the median, mode and mean.

9, In a right skewed distribution put in ascending order mean, median and mode.

10, In a standardized test third grader in USA, the mean score is 45 with a standard deviation of 6. Mona obtained a raw score of 39. What is Mon's Z score? ------------------

11, According to Chebyshev's Principle the percentage of the data covered by k standard deviation is given by (1-1/k^2). What is the minimum percentage of the population is covered by 2.5 standard deviation (Correct to 3 decimal places)? ---------------------------

12, Evaluate (12/4) 12C4 ----------------

13, Compute 12P4 -----------------------

14, In a survey of students in a certain College for their choice of sandwich the following results were obtain Ham with white bread 13; Ham with wheat bread 14, Turkey with white bread 21 Turkey with wheat bread 9, Beef with white bread is 25 Beef with wheat bread 28. Tuna with white bread 9 Tuna with wheat bread 6. None 11. What is the probability that a student will select white bread? ---------------

15, In a survey of students in a certain College for their choice of sandwich the following results were obtain Ham with white bread 13; Ham with wheat bread 14, Turkey with white bread 21 Turkey with wheat bread 9, Beef with white bread is 25 Beef with wheat bread 28. Tuna with white bread 9 Tuna with wheat bread 6. None 11. What is the probability that a student selected does not like sandwich? (correct to 3 places of decimal) --------------------

16, The probability of a biased dice showing a 3 is 1. /9 if this dice is rolled 5 times what is the probability of 2 threes showing up? (correct to 3 decimal place) ----------------

17, In a summer camp of 200 students 160 students are enrolled in Art class and 140 are enrolled in Musi. How many students are enrolled only in music? -------------------------

18, In a summer camp of 200 students 160 students are enrolled in Art class and 140 are enrolled in Musi. How many students are enrolled only in both music and Art? --------------

19, The probability of event A occurring is 0.13 and that of event B occurring is 0.25. The probability of both A and B is 0.11. What is the probability of A or B occurring if both are not mutually exclusive? -------

20, The probability that it will rain is 0.45 and the probability that there will be an earthquake is 0.012. What is the probability that it will and there will be an earthquake? ---------------------

21, The probability of A and B is 0.61 and the probability of A is 0.85. What is the probability B given A (correct to three decimal place)

22, The probability of event A is 0.15. If the outcome of the experiment is only two possible outcomes. If the experiment is repeated 30 times what is the mean and standard deviation of the outcome. (correct to three decimal place)

23, A distribution is normal if the men, mode, and median are what?

24, In a normal distribution, what percent of the population lie within two standard deviation about the mean?

25, In a normal distribution the mean of a population is given 45 with a standard deviation of 9. A sample of 25 was obtained compute the margin of error with alpha = 5% and a two tail (correct to three decimal place)

26, In a normal distribution the mean of a population is given 45 with a standard deviation of 9. A sample of 25 was obtained compute the margin of error. Compute the 95% confidence interval.

27, In a normal distribution for a population the mean is 45 and the standard deviation is 9, What is the probability that a value x less or equal than 20? (correct to 4 decimal place)

28, State the Alternate hypothesis to the statement that High School seniors' study at least 4 hours a day -----------

29, In a court trial the jury did not find the defendant guilty event Hough evidence proves otherwise. What type of error has been committed? --------------

30, In hypothesis testing when is the right decision made? --------------

31, Find the T score for a two-tail test of alpha equal to 0.05 and the sample size is 36 with a sample mean of 84 and sample standard deviation 18. The population mean is 88. (correct to 3 decimal place)

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32, If the correlation coefficient of a pair of data is -0.85. What is the relationship between the response and explanatory variable of there is no other hidden variable? ----------------

33, The mean of 7 numbers is 23.if an eighth number of 31 is added what will be the new mean? -------

34, The plot obtained by graphing the response variable against the explanatory variable is called --------

35, If a nurse aske you on a scale of 1 to 10 how severe is your pain; what kind of measure is the nurse using? ------------