Mathematics, 06.05.2020 02:26 Thejollyhellhound20
A consumer agency is interested in examining whether there is a difference in two common sealant products used to waterproof residential backyard decks. With cooperation of several builders in the area, they randomly assign 38 newly constructed decks to be treated with Very Clear deck sealant and another 37 newly constructed decks to be treated with Sure Seal deck sealant. After one year of being exposed to similar weather conditions, the decks are rated on a scale of 1 to 100. The mean rating for the decks treated with Very Clear is 89.2 with a standard deviation of 3.1. The mean rating for the decks treated with Sure Seal is 92.4 with a standard deviation of 3.8.
Which of the following represents the 90 percent confidence interval to estimate the difference (Very Clear minus Sure Seal) in mean ratings for the two deck sealants?
a.(89.2β92.4)Β±1.9603.1238+3.8237βββ ββββββ
b.(89.2β92.4)Β±1.6883.1238+3.8237βββ ββββββ
c.(89.2β92.4)Β±1.6453.1238+3.8237βββ ββββββ
d.(89.2β92.4)Β±1.6883.138+3.837βββββ βββ
e.(89.2β92.4)Β±1.645(3.138β+3.837β)
Answers: 1
Mathematics, 21.06.2019 22:30
Graph the system of inequalities presented here on your own paper, then use your graph to answer the following questions: y > 2x + 3y is less than negative 3 over 2 times x minus 4part a: describe the graph of the system, including shading and the types of lines graphed. provide a description of the solution area. (6 points)part b: is the point (Γ’β4, 6) included in the solution area for the system? justify your answer mathematically. (4 points)
Answers: 1
Mathematics, 21.06.2019 23:00
Find the distance between c and d on the number line c=3 and d=11
Answers: 1
Mathematics, 22.06.2019 00:00
The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?
Answers: 2
Mathematics, 22.06.2019 06:00
For a research project in a political science course, a student has collected information about the quality of life and the degree of political democracy in 50 nations. specifically, she used infant mortality rates to measure quality of life and the percentage of all adults who are permitted to vote in national elections as a measure of democratization. her hypothesis is that the quality of life is higher in more democratic nations. read this research description carefully. pay attention to the following: how many variables are in this research? what is the scale of the variable for infant mortality? p1c4. what is the dependent variable in this research problem? p1c4. is this research descriptive or inferential? does this research involves single variable analysis or two or more variable analysis?
Answers: 3
A consumer agency is interested in examining whether there is a difference in two common sealant pro...
Mathematics, 29.06.2021 08:30
English, 29.06.2021 08:30
Social Studies, 29.06.2021 08:30
Biology, 29.06.2021 08:30
Mathematics, 29.06.2021 08:30
Mathematics, 29.06.2021 08:30
Mathematics, 29.06.2021 08:30
Mathematics, 29.06.2021 08:30
Chemistry, 29.06.2021 08:40
Chemistry, 29.06.2021 08:40
Mathematics, 29.06.2021 08:40