Search & Filtering
Identify the random sampling technique used in each item.
________________1. You are given a list of all graduating students in your school. You decide to survey every 10th student on the list and ask them the organization that they belong.
________________2. You wish to make a comparison of the gender differences in Mathematics performance. You divide the population into two groups, male and female, and randomly pick respondents from each of the group. ________________3. You assign numbers to the members of the population and then use draw lots to obtain your samples to answeryour survey on the most popular festivals in the country.
________________4. You randomly pick five out of fifteen barangays to conduct your survey in your municipality or city about their best environment-friendly practices.
________________5. You write the names of each student in pieces of paper, shuffles, and then draw eight names to answer a survey on their ethical media practices
There are 150 students in a class. The distribution if their marks in a mathematics test are as follows
Class frequency
0-9 3
10-19 10
20-29 17
30-39 x
40-49 35
50-59 y
60-69 18
70-79 10
80-89 5
90-99 2
Required
The value of x given that the median mark is 44.357 (2marks)
The value of y given that the modal is 43.0 (2marks)
Draw an ogive of the data in (a) above (3 marks)
Use the ogive above to estimate
The 8th decile (2marks)
The 7-th percale (2marks)
The lower quartile (2marks)
Grace Ann wants to determine if the formula below describes a probability
distribution. Solve the following:
solve the D.E dy/dx = (6x^5-2x+1)/(cosy+e^y)
On a final examination in mathematics, the mean was 76 and the standard deviation was 5. Determine the
standard score of a student who received a score of 88 assuming the scores are normally distributed
let ck>0 for k=1,2,....,n.show that( c1+c2+....cn)/√n≤[ c1^2+c2^2+....+cn^2]^1/2≤c1+c2+...+cn
On a final examination in mathematics, the mean was 76 and the standard deviation was 5. Determine the
standard score of a student who received a score of 88 assuming the scores are normally distributed. (
Find all real numbers x such that
1<x^2<4
Between h0 and h1, what is good reason for starting a hypothesis test with h0?
Find the limit of Xn=1/2[Xn-1+Xn]
