Suppose that we have only 10 temperatures of people undergoing surgery, as below. 36.4 36.a 36.7 36.7 36.a 36.6 36.6 36.5 35.6 36.a (a=1) Find value, the margin of error E, and construct the 98% confidence interval for the mean of all body temperatures (a prior study has shown that body temperatures are normally distributed).
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- Suppose that we have only 10 temperatures of people undergoing surgery, as below.
36.4 36.a 36.7 36.7 36.a 36.6 36.6 36.5 35.6 36.a (a=1)
Find value, the margin of error E, and construct the 98% confidence interval for the
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- A researcher is interested in studying the use of hypnosis to relieve pain. She took a random sample of 16 subjects and measured their sensory ratings. The mean of the sensory ratings was found to be 7.5 and standard deviation to be 2.3. It is known that the sensory ratings are normally distributed. Construct a 99% confidence interval for the mean sensory ratings of the population. a) (5.81, 9.19) b) (6.27, 8.73) c) (6.36, 8.64) d) (6.02, 8.98)4. Suppose the number of patients seen in Nash General's Emergency Room each day varies normally with mean . Suppose you select a sample of 30 days and find the average number of patients seen in the ER on those days to be 32 with a sample standard deviation of 5. a. Give a 90% confidence interval for the mean number of patients useen per day. b. State the margin of error for the 90% confidence interval you found in part a.The following data represent the length of time, in days, to recovery for patients randomly treated with one of two medications to clear up severe bladder infections. Find a 95% confidence interval for the difference u, - H, between in the mean recovery times for the two medications, assuming normal populations with equal variances. Medication 1 n, = 11 x1 = 14 = 1.4 Medication 2 n2 = 12 X2 = = 17 2 = 1.2 S Click here to view page 1 of the table of critical values of the t-distribution. Click here to view page 2 of the table of critical values of the t-distribution. The confidence interval is (Round to two decimal places as needed.)
- You measure 38 backpacks' weights, and find they have a mean weight of 77 ounces. Assume the population standard deviation is 10.7 ounces. Based on this, what is the maximal margin of error associated with a 99% confidence interval for the true population mean backpack weight. Give your answer as a decimal, to two places H ouncesA researcher is interested in finding a 95% confidence interval for the mean number minutes students are concentrating on their professor during a one hour statistics lecture. The study included 133 students who averaged 36.1 minutes concentrating on their professor during the hour lecture. The standard deviation was 13.4 minutes. Round answers to 3 decimal places where possible. b. With 95% confidence the population mean minutes of concentration is between and minutes. c. If many groups of 133 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 minutes of concentration and about percent will not contain the true population mean minutes of concentration.The manager of a fleet of automobiles is testing two brands of radial tires and assigns one tire of each brand at random to the two rear wheels of eight cars and runs the cars until the tires wear out. The data (in kilometers) follow. Find a 99% confidence interval on the difference in the mean life. Car Brand 1 Brand 2 1 36,925 34,318 2 45,300 42,280 3 36,256 35.548 4 32,100 31,950 5 37,210 38,015 6 48,360 47,800 7 38.200 37,810 8 33,500 33,215 Round your answer to 2 decimal places. Do not use commas.please solve D, E, F with step by step solution. I am trying to understand No minitab and no excel answers.Imagine that a researcher wants to compare the intelligence levels of Poodles to all dogs. He hypothesizes that Poodles will score differently than other dogs. He uses a standard test of dog intelligence in his study. The population of all dogs has a mean of μ = 100, and an SD of 15. He obtains a random sample of 500 Poodles and he finds that the mean intelligence score of the sample is 117. Is this a one- or two- tailed test? Write the Ho and Ha for this research question. What kind of statistic should be calculated to test the hypothesis? Compute that statistic by hand What should the researcher conclude? Write a blurb describing the results→ 2. A consumer watchdog organization received customer complaints about the performance of one brand of batteries. To investigate, the researcher purchased 24 of these batteries and ran them until they died. This sample lasted a mean of 47 hours with a standard deviation of 3 hours. a. What assumption must we make about battery life in order to use a t model? #3 # 3 b. Find a 95% confidence interval for the mean lifespan of this brand of batteries. c. Write a conclusion based on your confidence interval. $ 4 % 5 < 6 6 DELL & 7 O 8 9 ) 0 РA clinic measured the systolic blood pressure for a random sample of 10 patients. The resulting 95% confidence interval for the mean systolic blood pressure of all the patients at this clinic was (111.3, 129.5). What was the mean systolic blood pressure from the sample of 10 patients? 18.2 111.3 120.4 129.5Karen wants to advertise how many chocolate chips are in each Big Chip cookie at her bakery. She randomly selects a sample of 78 cookies and finds that the number of chocolate chips per cookie in the sample has a mean of 19.3 and a standard deviation of 2.1. Find a 80% confidence interval for the number of chocolate chips per cookie for Big Chip cookies? Round your answers to one decimal place.The mayor is interested in finding a 90% confidence interval for the mean number of pounds of trash per person per week that is generated in the city. The study included 185 residents whose mean number of pounds of trash generated per person per week was 34.3 pounds and the standard deviation was 6.4 pounds. Round answers to 3 decimal places where possible. a. With 90% confidence the population mean number of pounds per person per week is between and pounds. b. If many groups of 185 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 pounds of trash generated per person per week and about percent will not contain the true population mean number of pounds of trash generated per person per week.