In the statement below identify the number in bold as either a population parameter or a sample statistic.A hospital reports that based on the 20 most recent cases, the average length of stay for surgical patients is 5.1 days.Question 8Select one:population parametersample statisticClear my choice

Determine whether the given value is a statistic or parameter.A sample of 100 employees of a company is selected, and the average age is found to be 38 years.

You are a data analyst for a health insurance company and want to estimate the population mean of the surgery durations for all brain tumor patients. To do so, you select a random sample of 32 brain tumor surgery patients, and you record the surgery duration for each. Assume it is known that the population standard deviation of the durations of all brain tumor surgeries is 1.68 hours.Based on your sample, follow the steps below to construct a 95% confidence interval for the population mean of the surgery durations for all brain tumor patients. (If necessary, consult a list of formulas.)(a)Click on "Take Sample" to see the results from your random sample of 32 brain tumor patients.Take SampleNumber of patients Sample mean Sample standard deviationPopulation standard deviation1.68Enter the values of the sample size, the point estimate for the population mean, the population standard deviation, and the critical value you need for your 95% confidence interval. (Choose the correct critical value from the table of critical values provided.) When you are done, select "Compute".Confidence level Critical value99% =z0.0052.57695% =z0.0251.96090% =z0.0501.645Sample size:Point estimate:Population standard deviation:Critical value:ComputeStandard error:Margin of error:95% confidence interval:(b)Based on your sample, enter the lower and upper limits to graph the 95% confidence interval for the population mean of the surgery durations for all brain tumor patients.95% confidence interval:0.002.004.006.008.0010.00

QUESTION 5A study was conducted to determine the duration of a typical consultation in an urban medical practice.  The results showed that the length of a consultation could be closely approximated by a normal distribution with a mean of 12.4 minutes and a variance of 9.75 minutes2.a)  Find the probability that a consultation would last less than 9 minutes.  (3 decimal places)b) How many of the individual patients visiting the medical centre will have a consultation time of less than 9 minutes if there are 522 individual patient consultations on a given day? Use your rounded answer, with 3 decimal places, from part a.    (Round your answer to the nearest whole number)

In a study, a random sample of 20 patients was selected to estimate the average recovery time after a surgical procedure. The sample mean recovery time was 10 days, and the sample standard deviation was 2 days. If the population standard deviation is unknown, what should be used to estimate the population mean?a.z statisticb.t statisticc.F statisticd.Chi square tes

A factory produces a type of light tube, Its lifespan can be expressed this way: X~(u, 200^2). From experience, it's known that the average lifespan u is 1500 hours. Now, after adopting a new technique, 25 light tubes are randomly selected from those produced and the average lifespan is found to be 1675 hours. With the new technique adopted, what is the value of the test statistic?