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6.5 6. (10 points) The football coach randomly selected ten players and timed how long each...
complet This Te Use the given degree of confidence and sample data to construct a confidence...
complet This Te Use the given degree of confidence and sample data to construct a confidence interval for the population mean H. Assume that the population has a normal distribution The football coach randomly selected ten players and timed how long each player took to perform a certain drill. The times (in minutes) were: 7.3 10.5 9 8 117 17 6.4 11.2 10.2 12.1 Determine a 95% confidence interval for the mean time for all players. A. 7.98 min< <...
28 11. (10 points) Ten randomly selected families are tested for the number of gallons of...
28 11. (10 points) Ten randomly selected families are tested for the number of gallons of water a day they use before and after viewing a conservation video. The results are shown below. Before 33 33 38 33 35 35 40 40 40 31 After 34 25 28 35 33 31 28 35 33 Assume that the paired differences are normally distributed. At the 1% significance level, do the data provide sufficient evidence to conclude that the mean amount of...
35 33 34 11. (10 points) Ten randomly selected families are tested for the number of...
35 33 34 11. (10 points) Ten randomly selected families are tested for the number of gallons of water a day they use before and after viewing a conservation video. The results are shown below. Before 33 38 33 35 40 40 40 31 After 28 25 28 35 33 31 28 35 33 Assume that the paired differences are normally distributed. At the 1% significance level, do the data provide sufficient evidence to conclude that the mean amount of...
35 33 34 11. (10 points) Ten randomly selected families are tested for the number of...
35 33 34 11. (10 points) Ten randomly selected families are tested for the number of gallons of water a day they use before and after viewing a conservation video. The results are shown below. Before 33 38 33 35 40 40 40 31 After 28 25 28 35 33 31 28 35 33 Assume that the paired differences are normally distributed. At the 1% significance level, do the data provide sufficient evidence to conclude that the mean amount of...
Assume that a simple random sample has been selected from a normally distributed population and test...
Assume that a simple random sample has been selected from a normally distributed population and test the given claim. State the final conclusion that addresses the original claim and select three correct choices. A manufacturer makes ball bearings that are supposed to have a mean weight of 30 g. A retailer suspects that the mean weight is actually less than 30 g. The mean weight for a random sample of 16 ball bearings is 29.2 g with a standard deviation...
The following data represent soil water content (percentage of water by volume) for independent random samples...
The following data represent soil water content (percentage of water by volume) for independent random samples of soil taken from two experimental fields growing bell peppers. Soil water content from field I: x1; n1 = 72 15.2 11.3 10.1 10.8 16.6 8.3 9.1 12.3 9.1 14.3 10.7 16.1 10.2 15.2 8.9 9.5 9.6 11.3 14.0 11.3 15.6 11.2 13.8 9.0 8.4 8.2 12.0 13.9 11.6 16.0 9.6 11.4 8.4 8.0 14.1 10.9 13.2 13.8 14.6 10.2 11.5 13.1 14.7 12.5...
5. (10 points) A sample of 36 people was randomly selected from among the workers in...
5. (10 points) A sample of 36 people was randomly selected from among the workers in a shoe factory. The time taken for each person to polish a finished shoe was measured. The sample mean was 4.0 minutes. Assume that 0 = 0.7 minutes. a) Check assumptions and choose an appropriate interval procedure. b) Find a 90% confidence interval for the true mean time, , to polish a shoe. Please show your work. c) Interpret the confidence interval.
(6 points) Ten randomly selected people took an IQ test A, and next day they took...
(6 points) Ten randomly selected people took an IQ test A, and next day they took a very similar IQ test B. Their scores are shown in the table below. Person ABCDEFGHIJ Test A 109|83|74 97 11693|92|124101105 Test B 114837497 1199690124 102 108 1. Consider (Test A - Test B). Use a 0.01 significance level to test the claim that people do better on the second test than they do on the first. (Note: You may wish to use software.)...
just part 2 (6 points) Ten randomly selected people took an IQ test A, and next...
just part 2
(6 points) Ten randomly selected people took an IQ test A, and next day they took a very similar IQ test B. Their scores are shown in the table below. Person A B C D E F GHJ Test A 118 99 95 111 120 86 89 107 80 103 Test B 12098 94 108 119 87 87 107 78 107 1. Consider (Test A - Test B). Use a 0.01 significance level to test the claim...
complet This Te Use the given degree of confidence and sample data to construct a confidence interval for the population mean H. Assume that the population has a normal distribution The football coach randomly selected ten players and timed how long each player took to perform a certain drill. The times (in minutes) were: 7.3 10.5 9 8 117 17 6.4 11.2 10.2 12.1 Determine a 95% confidence interval for the mean time for all players. A. 7.98 min< <...
28 11. (10 points) Ten randomly selected families are tested for the number of gallons of water a day they use before and after viewing a conservation video. The results are shown below. Before 33 33 38 33 35 35 40 40 40 31 After 34 25 28 35 33 31 28 35 33 Assume that the paired differences are normally distributed. At the 1% significance level, do the data provide sufficient evidence to conclude that the mean amount of...
35 33 34 11. (10 points) Ten randomly selected families are tested for the number of gallons of water a day they use before and after viewing a conservation video. The results are shown below. Before 33 38 33 35 40 40 40 31 After 28 25 28 35 33 31 28 35 33 Assume that the paired differences are normally distributed. At the 1% significance level, do the data provide sufficient evidence to conclude that the mean amount of...
35 33 34 11. (10 points) Ten randomly selected families are tested for the number of gallons of water a day they use before and after viewing a conservation video. The results are shown below. Before 33 38 33 35 40 40 40 31 After 28 25 28 35 33 31 28 35 33 Assume that the paired differences are normally distributed. At the 1% significance level, do the data provide sufficient evidence to conclude that the mean amount of...
Assume that a simple random sample has been selected from a normally distributed population and test the given claim. State the final conclusion that addresses the original claim and select three correct choices. A manufacturer makes ball bearings that are supposed to have a mean weight of 30 g. A retailer suspects that the mean weight is actually less than 30 g. The mean weight for a random sample of 16 ball bearings is 29.2 g with a standard deviation...
5. (10 points) A sample of 36 people was randomly selected from among the workers in a shoe factory. The time taken for each person to polish a finished shoe was measured. The sample mean was 4.0 minutes. Assume that 0 = 0.7 minutes. a) Check assumptions and choose an appropriate interval procedure. b) Find a 90% confidence interval for the true mean time, , to polish a shoe. Please show your work. c) Interpret the confidence interval.
(6 points) Ten randomly selected people took an IQ test A, and next day they took a very similar IQ test B. Their scores are shown in the table below. Person ABCDEFGHIJ Test A 109|83|74 97 11693|92|124101105 Test B 114837497 1199690124 102 108 1. Consider (Test A - Test B). Use a 0.01 significance level to test the claim that people do better on the second test than they do on the first. (Note: You may wish to use software.)...
just part 2
(6 points) Ten randomly selected people took an IQ test A, and next day they took a very similar IQ test B. Their scores are shown in the table below. Person A B C D E F GHJ Test A 118 99 95 111 120 86 89 107 80 103 Test B 12098 94 108 119 87 87 107 78 107 1. Consider (Test A - Test B). Use a 0.01 significance level to test the claim...
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