Suppose Jamal is studying poverty in his economics class, and he wants to compare the proportion of individuals living below the poverty line in different regions of the United States. He collects data on a simple random sample of people residing in the south and a simple random sample of people residing in the northeast. His data are summarized in the table. Роpulation Sample Number Proportion Population description size of successes of sucesses 1 residents of southern states n¡ = 1093 X1 = 178 = 0.16285 2 residents of northeastern states n2 = 1099 X2 = 143 P2 = 0.13012 Jamal wants to run a two-sample z-test for the difference of two proportions to test the alternative hypothesis, H1: Pi > , against the null hypothesis, Ho: Pi = P2, where pı is the proportion of residents of southern states that are living below the poverty line, and p2 is the proportion of residents of northeastern states that are living below the poverty line. Jamal selects a significance level of a = 0.05. Compute the z-statistic and P-value for Jamal's z-test for the difference of two proportions, p1 – p2. Give your answers precise to three decir z-statistic = P-value =
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
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