Mathematics, 09.07.2019 00:30 jacob7542
There are 2 telephone companies in a city. telephone company a charges a flat fee of $27.50 each month plus $0.09 per minute for all long distance calls. telephone company b charges a flat fee of $26.80 each month plus $0.10 per minute for all long distance calls. for how many long distance minutes would the charges of both companies be equal?
Answers: 1
Mathematics, 21.06.2019 23:00, serenityburke
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, 22.06.2019 01:30, kadinmorgan
Acell phone company offers two plans to its subscribers. at the time new subscribers sign up, they are asked to provide some demographic information. the mean yearly income for a sample of 40 subscribers to plan a is $45,000 with a standard deviation of $9,200. for a sample of 25 subscribers to plan b, the mean income is $64,300 with a standard deviation of $7,100. at the 0.025 significance level, is it reasonable to conclude the mean income of those selecting plan b is larger? assume unequal population standard deviations. hint: for the calculations, assume the plan a as the first sample. what is the decision rule? (negative amount should be indicated by a minus sign. round your answer to 3 decimal places.) compute the value of the test statistic. (negative amount should be indicated by a minus sign. round your answer to 2 decimal places.) what is your decision regarding h0 ? reject h0 fail to reject h0 compute the p-value. less than 0.01 between 0.01 and 0.025 between 0.025 and 0.05 between 0.05 and 0.10 greater than 0.10
Answers: 3
There are 2 telephone companies in a city. telephone company a charges a flat fee of $27.50 each mon...
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