math research journals

The cost of 3 math journals and 6 science journals is $66 and the cost of 4 math journals and 1 science journal is $32. Find the cost of a math journal and a science journal graphically. => $ 7 1 3 , $6.4 or $..

Represent the following data in a matrix. Library - A: Books 3068, Journals 14, CDs 225 Library - B: Books 3082, Journals 45, CDs 798 => Library A Library B Books Journals Cds ( 3082 3068 14 45 225 798 ) or Library A Library B Books Journals Cds ( 3068 3082 1..

A research scholar wants to complete the research work done by his student. In the data available with him, the class limits are missing. Find the class boundaries of each class whose midvalues are 25, 34, 43, 52, 61 and 70. => Figure 1 or Figure 3 or Figure 4 or Figure 2..

A researcher claims that the variance of the distances traveled by the buses of Indiana in a particular day is greater than that of the buses of Lowa. The journeys of 31 buses of Indiana and 25 for Lowa were observed and the variances were found as 5600 and 3200 respectively. Find the cri..

In a statistical hypothesis testing, a researcher kept the significance level, α = 0.05. Test result can be analyzed as: => there is a 10% chance of not rejecting the research hypothesis when it is true or there is a 5% chance of rejecting the research hypothesis..

A researcher would like to estimate the proportion of all mothers who take black coffee during pregnancy. She would like to be 90% confident that the estimate is within 2.5 percentage points of the true proportion. What sample size is required? => 0.574 or 0.109 or 1,089 or 2,178..

Average weekly charges of child care centers for infants is reported as $198. To test this report, a researcher collected data from 40 child care centers and found the average as $199.80 and standard deviation as $5. At α = 0.01, what will be the conclusion of the researcher..

The two matrices show the number of books, journals, CDs available in two big libraries A and B in a city. Which matrix shows the total number of books, journals, and CDs available in the libraries? Library - A Library - B Books Journals CDs ( 1022 75 700 ) ( 1031 22 6..

A researcher claims that the variance of temperatures recorded at different locations of 2 cities differ in a particular month. If the variance of temperature recorded at 25 locations of city 1 in that month is 32.5 and that of 16 locations of city 2 is 39, then find the F-value and check..

A medical researcher wants to know the relationship among a person's age ( x 1 ), hours of exercise ( x 2 ) and the systolic blood pressure (in mmHg) ( y ). He has collected the data of a sample of 8 persons for the research. Find (i) R 2 and (ii) the adjusted R 2 . => (i) 0.916..