Question

In: Statistics and Probability

- To compare the proportions p1, p2 of men and women, respectively, who watch football data...

- To compare the proportions p1, p2 of men and women, respectively, who watch football data was collected. In a sample of 227 men, 106 said that they watch football, and in a sample of 156 women, 48 said they watch football. (These are not real data.) Compute a 97 percent confidence interval for the difference p1 − p2 of proportions. Give the Margin of Error E, Left end point and Right end point

MOE = E = LEP = REP =

- To compare the proportion p1 of working men who make more than $50 K annually and the proportion p2 of working women who make more than $50 K annually, data was collected. In a sample of 210 men, it was found that 97 made more than $50 K last year. In a sample of 270 women, it was found that 88 made more than $50 K last year. Compute a 99 percent confidence interval for for the difference p1 − p2 of proportions. Give the Margin of Error E, Left end point and Right end point

MOE = E = LEP = REP =

- To compare the proportion p1 of defective light bulbs from Brand-A and the proportion p2 of defective bulbs from Brand-B, data was collected. In a sample of 270 bulbs from Brand-A, 37 were found to be defective. In a sample of 220 bulbs from Brand-B, 27 were found to be defective. Compute a 95 percent confidence interval for the difference p1 − p2 of proportions. Give the Margin of Error E, Left end point and Right end point

MOE = E = LEP = REP =

Solutions

Expert Solution

orchestra answered 2 years ago
Next > < Previous

Related Solutions

Let p1 and p2 be the respective proportions of women with iron-deficiency anemia in each of...
Let p1 and p2 be the respective proportions of women with iron-deficiency anemia in each of two developing countries. A random sample of 2000 women from the first country yielded 439 women with iron-deficiency anemia, and an independently chosen, random sample of 1700 women from the second country yielded 316 women with iron-deficiency anemia. Can we conclude, at the 0.05 level of significance, that the proportion of women with anemia in the first country is greater than the proportion of...
Let p1 and p2 be the respective proportions of women with iron-deficiency anemia in each of...
Let p1 and p2 be the respective proportions of women with iron-deficiency anemia in each of two developing countries. A random sample of 2000 women from the first country yielded 447 women with iron-deficiency anemia, and an independently chosen, random sample of 2300 women from the second country yielded 467 women with iron-deficiency anemia. Can we conclude, at the 0.01 level of significance, that the proportion of women with anemia in the first country is greater than the proportion of...
For developing countries in Africa and the Americas, let p1 and p2 be the respective proportions...
For developing countries in Africa and the Americas, let p1 and p2 be the respective proportions of babies with a low birth weight (below 2500 grams). A random sample of n1 = 2000 African women yielded y1 = 750 with nutritional anemia anda random sample of n2 = 2000 women from the Americas yielded y2 = 650 women with nutritional anemia. We shall test H0: p1 = p2 against the alternative hypothesis H1: p1 > p2 at α = 0.05.
​a) If the confidence interval for the difference in population proportions p1​ - p2 includes​ 0,...
​a) If the confidence interval for the difference in population proportions p1​ - p2 includes​ 0, what does this​ imply? ​ b) If all the values of a confidence interval for two population proportions​ are​ positive, then what does​ this​ imply? ​ c) If all the values of a confidence interval for two population proportions​ are​ negative, then what does​ this​ imply? d) Explain the difference between sampling with replacement and sampling without replacement. Suppose you had the names of...
Q13. The sample proportions p1 and p2 are pooled to create a single value for testing...
Q13. The sample proportions p1 and p2 are pooled to create a single value for testing           H0: π1=π2 (say π) vs some suitable H1. They are pooled because           a. adding sample sizes makes a still larger size to make Z test valid and efficient          b. pooling proportions of unequal sample sizes increases efficiency of Z to favor H0.           c. pooled proportion satisfies all characteristics of a, b, d           d. H0 is assumed true under which...
a) Use the normal distribution to find a confidence interval for a difference in proportions p1-p2...
a) Use the normal distribution to find a confidence interval for a difference in proportions p1-p2 given the relevant sample results. Assume the results come from random samples. A 99% confidence interval for p1-p2 given that p^1=0.76 with n1=590 and p^2=0.67 with n2=260 Give the best estimate for p1-p2, the margin of error, and the confidence interval. Round your answer for the best estimate to two decimal places and round your answers for the margin of error and the confidence...
A 95% confidence interval for a difference in proportions p1-p2 if the samples have n1=60 with...
A 95% confidence interval for a difference in proportions p1-p2 if the samples have n1=60 with p^1=0.69 and n2=60 with p^2=0.56, and the standard error is SE=0.09.
Construct the indicated confidence interval for the difference between population proportions p1 - p2. Assume that...
Construct the indicated confidence interval for the difference between population proportions p1 - p2. Assume that the samples are independent and that they have been randomly selected. 4) x1 = 44, n1 = 64 and x2 = 50, n2 = 73; Construct a 95% confidence interval for the difference 4) between population proportions p1 - p2.
If a 95% confidence interval for two population proportions p1-p2 is a range of positive numbers,...
If a 95% confidence interval for two population proportions p1-p2 is a range of positive numbers, then what does this imply? a) The relative size of the population proportions cannot be determined b)With 95% confidence, there is no difference in the population proportions. c) With 95% confidence, the first population proportion is greater than the second. d) With 95% confidence, the first population proportion is less than the second.
Two charged proteins P1 and P2 are located at positions (1m,1m) and (-1m,1m) respectively on a...
Two charged proteins P1 and P2 are located at positions (1m,1m) and (-1m,1m) respectively on a Cartesian coordinate system. They have charges of 1.0 nC and -1.0 nV respectively. A key enzyme E1 which regulates an important biochemical pathway, is localed at the origin of the coordinate system. compute the electrical potential V at the position of E1 Draw a vector diagram for the electrical field vector ETOT, at the position of E1. show, or argue that the y component...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT