Mathematics, 26.07.2019 04:00 DrBlizzY
Asociologist wants to determine the current population of us households that use e-mail. according to a study conducted five years ago, 76% of households were using e-mail. the sociologist would like to find out how many households must be surveyed to be 95% confident (z*-score = 1.96) that the current estimated population proportion is within a 2% margin of error. use the formula n = (1 – ) • . how many households must be surveyed to be 95% confident that the current estimated population proportion is within a 2% margin of error?
Answers: 1
Mathematics, 21.06.2019 18:00
Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.
Answers: 1
Mathematics, 21.06.2019 18:40
Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.
Answers: 3
Mathematics, 21.06.2019 23:00
The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?
Answers: 1
Mathematics, 21.06.2019 23:30
Pleting the square f the given find the x-intercepts of the parabola with vertex (-5,13) and y-intercept (0, 12). write your answer in this form: (14,.99). if necessary, round to the nearest hundredth. *- h enter the correct answer, de verter, and ametry 00000 done doo
Answers: 2
Asociologist wants to determine the current population of us households that use e-mail. according t...
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