the electric cooperative needs to know the mean household usage Question 9 of 14, Step 1...
Question 9 of 14. Step 1 of 1 5/14 Correct A research scholar wants to know how many times per hour a certain rand of virus reproduces the means found to be 64 reproductions and the population standard deviation is known to be 24. Bample of 955 was used for the study constructe 99 fidence merduction per hour for the us Round your store del place Save & Ext Certify Lesson: 8.1 Estimating Population Means La Cartoon Lesson 1 Carly...
A research scholar wants to know how many times per hour a certain strand of virus reproduces. The mean is found to be 7.6 reproductions an the population standard deviation is known to be 2.2. If a sample of 201 was used for the study, construct the 80 % confidence interval for the true mean number of reproductions per hour for the virus. Round your answers to one decimal place. Answer/How to Enter) 10 Points Keyr Keyboard Short Lower endpoint...
A research scholar wants to know how many times per hour a certain strand of virus reproduces. He wants to construct the 85%confidence interval with a maximum error of 0.19 reproductions per hour. Assuming that the mean is 12.3 reproductions and the standard deviation is known to be 2.5, what is the minimum sample size required for the estimate? Round your answer up to the next integer.
A research scholar wants to know how many times per hour a certain strand of virus reproduces. He wants to construct the 80% confidence interval with a maximum error of 0.2 reproductions per hour. Assuming that the mean is 11.5 reproductions and the variance is known to be 5.76, what is the minimum sample size required for the estimate? Round your answer up to the next integer.
The electric cooperative needs to know the mean household usage of electricity by its non-commercial customers in kWh per day. Assume that the population standard deviation is 1.5 kWh. The mean electricity usage per family was found to be 19.5 kWh per day for a sample of 271 families. Construct the 90% confidence interval for the mean usage of electricity. Lower Endpoint: _______________ and Upper Endpoint:____________
The electric cooperative needs to know the mean household usage of electricity by its non-commercial customers in kWh per day. They would like the estimate to have a maximum error of 0.14 kWh. A previous study found that for an average family the standard deviation is 2.4 kWh and the mean is 16.3 kWh per day. If they are using a 90% level of confidence, how large of a sample is required to estimate the mean usage of electricity? Round...
The electric cooperative needs to know the mean household usage of electricity by its non-commercial customers in kWh per day. They would like the estimate to have a maximum error of 0.12 kWh. A previous study found that for an average family the variance is 1.96 kWh and the mean is 15.1 kWh per day. If they are using a 95% level of confidence, how large of a sample is required to estimate the mean usage of electricity? Round your...
The electric cooperative needs to know the mean household usage of electricity by its non-commercial customers in kWh per day. They would like the estimate to have a maximum error of 0.15 kWh. A previous study found that for an average family the standard deviation is 2.5 kWh and the mean is 15.9 kWh per day. If they are using a 85% level of confidence, how large of a sample is required to estimate the mean usage of electricity? Round...
A research scientist wants to know how many times per hour a certain strand of bacteria reproduces. He wants to construct the 95 % confidence interval with a maximum error of 0.19 reproductions per hour. Assuming that the mean is 6.4 reproductions and the standard deviation is known to be 1.8, what is the minimum sample size required for the estimate? Round your answer up to the next integer
PLEASE DOUBLE CHECK ANSWERS ARE CORRECT The electric cooperative needs to know the mean household usage of electricity by its non-commercial customers in kWh per day. They would like the estimate to have a maximum error of 0.14 kWh. A previous study found that for an average family the variance is 5.29 kWh and the mean is 16.6 kWh per day. If they are using a 80% level of confidence, how large of a sample is required to estimate the...