Mathematics, 25.07.2019 10:00 2023greenlanden
Paul wants to compare whether the prices of tangerines in two supermarkets differ significantly. he has been noting down the daily prices for the last few days and has found the difference in the sample means to be 20 cents. if the standard deviation of the distribution of the difference between sample means is 28 cents and we are testing the null hypothesis at the 95% confidence level, which statement is true? the difference between the two means is significant at the 95% confidence level, so the null hypothesis must be rejected. the difference between the two means is not significant at the 95% confidence level, so the alternative hypothesis must be rejected. the difference between the two means is not significant at the 95% confidence level, so the null hypothesis must be rejected. the difference between the two means is not significant at the 95% confidence level, so the alternative hypothesis must be accepted. the difference between the two means is significant at the 95% confidence level, so the alternative hypothesis must be rejected.
Answers: 1
Mathematics, 21.06.2019 20:00
How can you construct perpendicular lines and prove theorems about perpendicular lines
Answers: 3
Mathematics, 21.06.2019 22:20
(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)
Answers: 2
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
In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.
Answers: 3
Paul wants to compare whether the prices of tangerines in two supermarkets differ significantly. he...
Biology, 27.01.2021 16:30
History, 27.01.2021 16:30
History, 27.01.2021 16:30
Mathematics, 27.01.2021 16:30
Mathematics, 27.01.2021 16:30
Mathematics, 27.01.2021 16:30
Mathematics, 27.01.2021 16:30
Mathematics, 27.01.2021 16:30