Search & Filtering
Suppose a graphing calculator is used to choose a random integer (whole #) between 1 and 60, with each integer having an equal chance of being selected. (2 pts each)
a) What is the probability that the number chosen is greater than 39?
b) Use the Addition Rule to find the probability that the calculator selects a number that is greater than 39 or is an even number less than 15.
c) Use the Addition Rule to find the probability that the calculator selects a number that is either greater than 39 or is an even number.
2. An instructor collects the home addresses of each student in a class of 30 students. Suppose A represents the event that all the students in the class live on different streets. (2 pts each)
a) Describe, in a sentence, what the event (A complement) represents.
Temperature, x Converted Sugar, y
1.2 8.2
1.4 8.5
1.6 8.4
1.8 9.3
2.0 8.9
2.2 10.5
2.4 9.3
a. Compute for the correlation coefficient
b. Estimate the linear regression line.
c. Estimate the mean amount of sugar produced when the temperature recorded is 1.7.
TEMPERATURE X CONVERTED SUGAR Y
1.2 8.2
1.4 8.5
1.6 8.4
1.8 9.3
2.0 8.9
2.2 10.5
2.4 9.3
a. Compute for the correlation coefficient.
b. Estimate the linear regression line.
c. Estimate the mean amount of sugar produced when the temperature recorded is 1.7.
Follow naming guidelines in the syllabus.
I. Using the table, find the following:
1. Mode, Median, Mode
2. Mean Deviation
3. Variance and Standard Deviation
72 44 80 40 44 60 80 43 55 62
73 49 58 48 80 53 52 47 51 80
46 61 41 74 78 56 62 55 75 51
64 40 79 65 76 66 46 60 67 52
76 49 44 47 45 68 57 56 59 68
II. Given sigma μ=45 and σ, = 6, determine and plot the location of the z scores of the following raw scores: 56, 70,82
III. The scores of SLU College Admission Test are normally distributed,with = 80 and = 6. Find the following:
1. What is the percentile rank of 84?
2. What percentageof scores fall between 64 and 90?
The average expenditure per student, based on daily average attendance, for a certain school year was Php 496,176.00, with a population standard deviation of Php 74,880.00.
A survey for the next school year of 150 randomly selected students resulted in a sample average expenditure of Php 518,304.00. Do these results indicate that the average expenditure has decreased? Choose your own level of significance.
The average monthly cell phone bill was reported to be Php 2,400.00. Random sampling of a large cell phone company found the following monthly cell phone charges.
2,679.85 2,461.00
2,902.56 3,023.25
2,812.80 2,361.50
2,394.20 3,380.16
2,517.60 2,403.95
At the .05 level of significance, can it be concluded that the average phone bill has increased?
