Assume that a sample is used to estimate a population mean . Find the 90% confidence interval for a sample of size 781 with a mean of 66.1 and a standard deviation of 17.7. Enter your answer as a tri-linear inequality accurate to 3 decimal places.
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: Given that x¯=44.7s=18.1n=796 Confidence level=98% Significance level=2% degrees of…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: The sample mean = 16.9. Sample standard deviation, s is 8.1. The sample size, n is 890. The degrees…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: Given that, Sample mean is 61.4 Sample standard deviation s=18.5 Sample size n=308 98%…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: GIVEN DATA,μ=58.9σ=18.1n=910z-value at 95% confidence is Zc=1.96
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A:
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A:
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A:
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: The sample mean is .The sample size is .The sample standard deviation is .The confidence level is .
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A:
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: The given sample size is 370, sample mean is 15.9 and sample standard deviation is 9.7.
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: Solution
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: From the provided information, Sample size (n) = 705 Sample mean (x̄) = 60.3 Sample standard…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A:
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: Given information, x¯=21.1n=727s=10.1 Confidence level=99%. Significance level is 1%…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A:
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: Given information- Sample size, n = 832 Significance level, α = 0.20 Sample mean, x-bar = 47.3…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A:
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: Given that, The effectiveness of a blood-pressure drug is being investigated. An experimenter finds…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: Given information Sample size (n) = 603 Sample mean x̅ = 16.6 Standard deviation (s) = 20.5…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: Given that Sample size n =940 Sample mean =48.1 Standard deviation =11.3
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A:
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: Given information: sample mean=19.9 sample standard deviation=11.4 sample size=769 degrees of…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: From the provided information,sample size (n) = 889Sample mean () = 40.4Sample standard deviation…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A:
Q: Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 99%…
A: Given : n=868 , X-bar=77.2 , s=18.1 , α=0.01 Since , the population standard deviation (σ) is…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: Given Information: On average, the reduction in systolic blood pressure is 45.4 for a sample of size…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: 57.1 < μ < 58.1Explanation:Step 1: Calculate the degrees of freedom.Since we are given a…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: We have given that, Mean = 18.1 Standard deviation = 8.5 Sample size = 413 We to construct 99%…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A:
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: The sample mean is given by, x = 18.1. Sample size, n = 413. The sample standard deviation, s =8.5.…
Q: You measure 48 watermelons' weights, and find they have a mean weight of 60 ounces. Assume the…
A: From the provided information,Confidence level = 95%
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: The mean reduction in systolic blood pressure is 27.2, the population standard deviation is 11.7,…
Q: ness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the…
A: As the population standard deviation is not known, we will use t distribution. Df = n-1=697-1=696…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A:
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A:
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: Sample size : n=1107 Sample mean : x¯=40.4 Sample standard deviation : s=17.9 Confidence level :…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A:
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: Given Data: x¯=59.4n=21s=8.6 Degree of freedom=n-1=23
Q: Define the set of limits in which you expect the population mean to lie by using confidence interval…
A:
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A:
Q: Assume that a sample is used to estimate a population mean μ. Find the 98% confidence interval for a…
A: Given X-bar=29.9 S=20.7 n=1044 Confidence interval=98%
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: Obtain the critical value: The level of confidence is 1- α = 0.95. The sample size is n = 276. The…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: Sample mean (x̅) = 71.9 Sample size (n) = 364Standard deviations (s) = 20.1Significance level (α) =…
Q: average, the reduction in systolic blood pressure is 28.8 for a sample of size 697 and standard…
A: We have given that Sample n=697 Sample mean =28.8 Standard deviation =20.4
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: Given : n= 990.0 , x̄= 44.4 s= 16.9 At 99.0 % confidence level , z score= 2.576
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: Obtain the critical value: The level of confidence is 1- α = 0.98. The sample size is n = 335. The…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: Given: Sample mean, x = 38.8 Standard deviation, σ = 11.7 Sample size, n = 911 Level of…
Q: Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 99%…
A: Confidence interval: It is defined as the range which contains the value of true population…
Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…
A: Since the population standard deviation is unknown, t distribution can be used for the computation…
Step by step
Solved in 3 steps with 5 images
- The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 58.1 for a sample of size 997 and standard deviation 11.1.Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 80% confidence level).Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place).The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 21.1 for a sample of size 727 and standard deviation 10.1.Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 99% confidence level).Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). ___ < μ < ____ Answer should be obtained without any preliminary rounding. Is it correct answer 20.2 < μ < 22?The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 39.5 for a sample of size 625 and standard deviation 9.1.Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 98% confidence level).Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). < μμ < Answer should be obtained without any preliminary rounding
- A fitness center is interested in finding a 98% confidence interval for the mean number of days per week that Americans who are members of a fitness club go to their fitness center. Records of 252 members were looked at and their mean number of visits per week was 2.5 and the standard deviation was 1.9. a. To compute the confidence interval use a ? distribution. b. With 98% confidence the population mean number of visits per week is between and visits. c. If many groups of 252 randomly selected members are studied, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population mean number of visits per week and about percent will not contain the true population mean number of visits per week.The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 41.9 for a sample of size 304 and standard deviation 16.7.Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 99% confidence level).Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). < μμ <The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 66.5 for a sample of size 855 and standard deviation 6.3. Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 99% confidence level). Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). Answer should be obtained without any preliminary rounding.
- You measure 40 turtles' weights, and find they have a mean weight of 66 ounces. Assume the population standard deviation is 13.5 ounces. Based on this, construct a 99% confidence interval for the true population mean turtle weight. Give your answers as decimals, to two places + ouncesThe effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 77.8 for a sample of size 636 and standard deviation 16.1. Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 98% confidence level). Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). Answer should be obtained without any preliminary rounding. Check AnswerThe effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 70.9 for a sample of size 793 and standard deviation 8.2. Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 95% confidence level). Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). < u < Answer should be obtained without any preliminary rounding.
- The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 79.2 for a sample of size 909 and standard deviation 20.2. Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 98% confidence level). Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place).The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 85.6 for a sample of size 318 and standard deviation 6.5.Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 98% confidence level).Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). < μ < Answer should be obtained without any preliminary rounding.The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 42.7 for a sample of size 818 and standard deviation 20.2.Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 99% confidence level).Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place).