The management of Regional Hospital has made substantial improvements in their hospital and would like to test and determine whether there has been a significant decrease in the average length of stay of their patients in their hospital. The following data has been accumulated before and after the improvements. At the 5% level, test to determine if there has been a significant reduction in the average length of stay.

Q: The failure rate for taking the bar exam in Philadelphia is 41%.  If 375 people take the bar exam,…

A: Given that, The failure rate for taking the bar exam in Philadelphia is 41%  i.e. probability, p =…

Q: A recent survey by the U.S. Census Bureau determined that the median monthly housing rent was $643.…

A: W heaven to find asked percentage from given data.

Q: Of 60 patients treated with a certain medication, 24 showed no improvement. What percent of patients…

A: Total patient=60 Patient who showed no improvement=24 To calculate: what percent of patients…

Q: What is the median nutritional status for the 7 individuals?

A: The number of nutritional status is 7.

Q: A recent survey by the U.S. Census Bureau determined that the median monthly housing rent was $631.…

A:

Q: In the year 2020, City A had a population of 200,000. 300 existing cases of colon cancer were…

A: GivenThe population of City A =200000The existing cases of Colon Cancer =300The number of cases…

Q: Helga scored in the 70th percentile rank on an exam. If 300 students took the exam, how many…

A: Given: percentile rank of Helga: 70th           total number of students who took exam: 300 students…

Q: Make a table showing the approximate values and the actual value, together with the percentage error

A: xy'=12x-3y..................1Let x=e2z=logxdzdx=1xdydx=dydz·dzdx ⇒dydz·1xxdydx=dydzNow equation (1)…

Q: The median yearly salary for a police dispatcher in a large city was $44,528. If the 25th percentile…

A: a. The median yearly salary for a police dispatcher in a large city was $44528.

Q: If a person’s z score equals -2.02, what is their percentile?

A: Given problem Given that   Given Person's z score =  -2.02 Using the Standard Normal Table ( Z Table…

Q: Find P65, the 65th percentile.

A: Normal distribution is the most widely used distributions . All mathematical complexities get easily…

Q: Represent it by a suitable percentage diagram.

A: ANSWER The percentage values are converted into degree values using the following formula. Degree…

Q: what are the percentages of each individual fruit?

A: What are percentage of each individual

Q: A national chain of department stores ranks its 1,000,000 salespeople by the monetary value of their…

A: Given Data: Boris sales at 89th percentile Melissa's sales at 73rd percentile

Q: When 445 junior college students were​ surveyed, 135 said that they have previously owned a…

A:

Q: A recent study by the u.s. census bureau determined that the median monthly housing rent was $641.…

A: The median is middle value of the observations, above or below which 50% of the observations lie.…

Q: Marriot Hotel noticed a decrease in customers' repea- business accompanied by an increase in…

A: Dependent variable is the variable which depends on the another variable. Increase or decrease in…

Q: The test score at the 25th percentile is 108. What is the test score at the 75th percentile?

A: Solution

Q: What is the percent of deaths in 2003, or after 2010?

A:

Q: higher

A: Given: Sample size, n = 54 Sample mean, sm=29 Standard deviation, s=7.8 Suppose, level of…

Q: Find the z-score that corresponds to the 63rd percentile

A: we have to find the Z-score that corresponds tothe 63rd percentile.

Q: In a class of 10 students, James got 3rd position from the lowest. What is his percentile rank?

A: Given data: In a class of 10 students, James got 3rd position from the lowest. To find: What is his…

Q: Ten HR majors had an average grade of 94 on an exam. Fourteen business majors averaged 86, while six…

A: Given problem Given that   Ten HR majors had an average grade of 94 on an exam. Fourteen business…

Q: in the highest 2.5 percent eat?  What is the z-score

A: Given that 2.5% of the highest area present in the data. That is, P(Z>z)=2.5%=0.025…

Q: In general, % of the values in a data set lie at or below the 74th percentile.

A: Solution: 74th percentile means that 74% of the data below that value and of 100–74=26% of the data…

Q: What is the percentile rank x=15 and what is the score for 75th percentile?

A: If the we have no of scores is 15 then we have formula for percentile rank as:…

Q: Determine the statistical relationship between the average answer time (seconds) and the average…

A: Simple linear regression model: A simple linear regression model is given as y = b0 + bx, where y is…

Q: Roxanne ranks 10th in a class of 40. Her percentile rank is

A:

Q: recent survey by the U.S. Census Bureau determined that the median monthly housing rent was $640. If…

A: Given that  Median=640 First Quartile=496

Q: The results of a nationwide aptitude test in Mathematics are normally distributed with μ=80 and…

A:

Q: In a move to provide additional sales for U.S. car manufacturers, the White House announced the…

A: Given: Total number of vehicles in a new fleet               = 17,600 Hence, total hybrid Sedan +…

Q: given the following: median (50th percentile) = 854 25th percentile = 799   What percent of the…

A: The median is middle value of the observations, above or below which 50% of the observations lie.…

Q: What percent of students preferred iced tea?

A: Total number of students = (840+390+830+510+430) = 3000 Number of students who preferred iced tea =…

Q: doesn't the mean of a sample population equal the true proportion?

A: Yes, the sample population is equal to true proportion.

Q: What is the level of measurement for:  DEGREE  EDUCATION INCOME

A: Nominal: Nominal scales are used for labeling variables without any quantitative value.…

Q: A typical middle-income household in 1980 earned $38,405. A similar household in 2009 earned…

A:

Q: The cighth grade girls' basketball team played a total of 13 games this season. If they scored a…

A:

Q: What is the percentile for a person that has taken 16 courses? (Your answer should be a %, such as…

A: Percentiles can be calculated using the formula  n = (P/100) x N, where P = percentile, N = number…

Q: The median salary of the 1,073 teachers in a large public school district is 38,850 dollars. If the…

A: From the given information, Total number of teachers =1073 Median salary of a teacher = $ 38,850…

Q: Sean also took the SAT (μ=1010,σ=200) and had a z score of +0.25. What was his SAT raw score? What…

A: Given data, μ=1010 σ=200 z-score=0.25

Q: A recent survey by the U.S. Census Bureau determined that the median monthly housing rent was $629.…

A:

Q: A student answered 78 out of 100 homework questions correctly on the first try. What percent of…

A: Solution-: A student answered 78 out of 100 homework questions correctly on the first try. What…

Q: What is the percentage of players whose age is less than 32?

A: here given  mean = 33 year  standard deviation  =  2 year x= retirement age

Q: Given μ=25and σ=4.8,what would be the x-value for the ninety-fifth percentile?

A: Given:  μ=25 σ=4.8

Q: Complete the table and determine what percent of the people have exactly zero sibling(s)?

A: Here it is given that , 210 people are asked how many siblings they have. So it means that , you're…

Q: Given μ=25and σ=4.8,what would be the x-value for the twenty-fifth percentile?

A:

Q: A biologist looked at the relationship between number of seeds a plant produces and the percent of…

A: Here AS PER POLICY I HAVE CALCULATED 3 SUBPART PLZ REPOST FOR REMAINING PARTS

Q: is the 95th percentile finish time, ? 95? (Round your answer to nearest tenth

A: To calculate the 95th percentile of a normal distribution, we used the formula as: X=μ+Zσ Where 'X'…