First we need to find the sample standard deviation. Following table shows the calculations:
So
sample size: n=7
Mean:
SD:
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Correct option is B.
Use the given data to construct a confidence interval for the population standard deviation, A SELECT...
Use the given data to construct a confidence interval for the population standard deviation,A) SELECT A B) Assume that the population has a normal distribution: The football coach randomly selected the following players and timed how long each player took to perform a certain drill. The times (in minutes) were: 4.1048445 < ơ < 9.8431834 2.7048445 < ơ < 9.2431834 C) D) None of These 4.1048445 < σ < 8.0431834 14,4,5,8, 11,15,10 Find a 95.0 confidence interval for the population...
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< <...
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...
6.5 6. (10 points) The football coach randomly selected ten players and timed how long each player took to perform a certain drill. The times in minutes) were: 12.9 13.3 13.3 7.7 11.7 9.9 125 10.8 12.2 Assume that the population is normally distributed. a) Check assumptions and choose an appropriate interval procedure b) Use 1-var-stats to find the sample mean and the sample standard deviation c) Find a 95% confidence interval for the mean time for all players. Please...
Use the standard normal distribution or the t-distribution to construct a 99% confidence interval for the population mean. Justify your decision. If neither distribution can be used, explain why. Interpret the results. In a recent season, the population standard deviation of the yards per carry for all running backs was 1.27. The yards per carry of 25 randomly selected running backs are shown below. Assume the yards per carry are normally distributed. 2.9 8.4 7.2 4.3 6.8 2.7 7.2 4.8...
Use the standard normal distribution or the t-distribution to construct a 99% confidence interval for the population mean. Justify your decision. If neither distribution can be used, explain why. Interpret the results. In a recent season, the population standard deviation of the yards per carry for all running backs was 1.21. The yards per carry of 25 randomly selected running backs are shown below. Assume the yards per carry are normally distributed. 3.2 6.8 6.1 3.6 6.3 7.1 6.4 5.5...
Use the given degree of confidence and sample data to construct a confidence interval for the population mean y Assume that the population has a normal distribution Thirty randomly selected students took the calculus final the sample mean was 90 and the standard deviation was 5.1. construct a 90% confidence interval for the mean score of all students. Round to be decimal places O A 87.44 <<92.56 OB. 87.71 <<92.29 OC 8743<<92.57 OD 8842 <<91.58
Use the given degree of confidence and sample data to construct a confidence interval for the population mean p. Assume that the population has a normal distribution. Thirty randomly selected students took the calculus final. If the sample mean was 76 and the standard deviation was 7.7, construct a 99% confidence interval for the mean score of all students. 72.13 < x < 79.87 73.61 < p < 78.39 O 72.54 < p < 79.46 O 72.14< p < 79.89
Construct a 98% confidence interval for the population standard deviation σ of a random sample of 20 crates which have a mean weight of 154.2 pounds and a standard deviation of 9.4 pounds. Assume the population is normally distributed. The confidence interval is: Group of answer choices between 6.52 and 15.02 between 6.81 and 14.83 between 42.51 and 225.60 between 46.39 and 219.94
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. Thirty randomly selected students took the calculus final. If the sample mean was 82 and the standard deviation was 12.6, construct a 99% confidence interval for the mean score of all students. Round to two decimal places. O A. 75.68 < < 88.32 OB. 75.66<u < 88.34 OC. 78.09 < < 85.91 OD....