The mean waiting time for non-emergency surgeries in your hospital is 87.5 days with a standard deviation of 14 days. Over the last year the hospital’s CEO has been implementing various programs to try to reduce the waiting time. You are asked to test whether the wait times have changed from the previous average. Not knowing if the wait times have increased or decreased, you hypothesize that the wait times are not 87.5 days. You randomly select 100 cases and calculate the average wait time, which is 84 days. Use ?= 0.05

Q: (i) Determine the 90% confidence interval for the true mean time from the model. (ii) Suppose the…

A:

Q: On Rhea's twitter account her tweets over the years have averaged about 35 likes per tweet with a…

A: Given Information: Hypothesized value of population mean is μ0=35 Population standard deviation σ=10…

Q: Linus was visiting the great pumpkin patch where he decided to buy a pumkin from a section of the…

A:

Q: You are a newsvendor selling San Pedro Times every morning. Before you get to work, you go to the…

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Q: in 2015 when she was a high school senior, linda scored 680 on the mathmatics part of the SAT the…

A: Obtain the Z-score for the SAT math score of 680 scored by Linda.Consider the scores on SAT math…

Q: Three years ago the mean price of an existing single family home was 243,757. Determine the null and…

A: Ans: Three years ago the mean price of an existing single-family home was 243,757.         Determine…

Q: mean IQR closer to farther from The Week 2 data values tend to be. 5. their median than the Week 1…

A: Week 1 Median =14.5 IQR = 1.15   Week 2 Median =16 IQR = 1.5

Q: In the past, the value of houses a local realtor has sold is normally distributed with a mean of…

A: We have to find given score.

Q: anic sells a brand of automobile tire that has a life expectancy that is normally distributee cee…

A: Given Mean=36000 Standard deviations=2600 Z=-1.282

Q: Loretta, who turns 91 this year, has heard that the mean systolic blood pressure among the elderly…

A: The hypothesis for the claim 'mean systolic blood pressure among elderly adults is greater than 120…

Q: In 2015, the mean number of books that college students would buy was 35. With the use of Open…

A: From the provided information,

Q: C. The test statistic (t (please show your answer to 3 decimal places.) d. The p-value = (Please…

A: We have to test that if mean time is more than 2.06

Q: The department of public safety has an old memo stating that the number of accidents per week at a…

A: From the provided information, Sample size (n) = 52 Sample mean (x̅) = 2 Population standard…

Q: A market research firm reported that the mean annual earnings of all family practitioners in the…

A:

Q: Happy Hair will hire only those hairdressers in the top 20 percent based on the amount of time it…

A: Given: Mean= μ== 67.5 Standard deviation= σ = 12.5

Q: facing a shortage the student activity council decides to reduce funding for each of it's student…

A: Given : facing a shortage the student activity council decides to reduce funding for each of it's…

Q: Your hospital has just reset the safety stock level for sleeping pills to be 220 pills. If your…

A: To calculate the probability of running out of sleeping pills on any given day, we can use the…

Q: Do students who are members of fraternities or sororities have GPAS alfferent from the student body…

A: μ=2.59,s=0.34,x¯=2.47,n=123Decision rule: When p value< level of signicance,then reject the null…

Q: A statistics instructor claims that statistical knowledge causes an increase in life satisfaction.…

A: Given Information: Additional statistics education: Sample size n1=39 Sample mean x¯1=67 Sample…

Q: The director of research and development is testing a new drug. She wants to know if there…

A: Given information- Population mean, µ = 375 Population standard deviation, σ = 24 Sample size, n =…

Q: A psychologist wants to estimate the amount of math anxiety that the population of high school…

A: The psychologist wants to estimate the amount of math anxiety that the population of high school…

Q: Americans (on average) individually eat 16 pounds of seafood each year with a standard deviation of…

A: Given that   x̄ = 14 , μ = 16 , ? = 7 , n = 4

Q: Men hoping to have children are encouraged to avoid hot tubs or saunas because heating the scrotum…

A:

Q: A mandatory competency test for high school sophomores has a normal distribution with a mean of…

A: Assume a random variable X, defines the scores obtained in competency test for sophomores of high…

Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

A: We have to solve the given problem by normal distribution.

Q: The General Social Survey polled a sample of 1056 adults in the year 2015, asking them how many…

A: From the provided information,

Q: Nintendo is doing a classical game competition for the anniversary of Super Maria bros. The average…

A:

Q: shoppers at the mall spend the same amount of money on average the day after Thanksgiving compared…

A: Given that    Sample sizes n1=56      , n2=43       Sample means X̄1= 145     , X̄2=123    , ?1 =46…

Q: A banker finds that the number of times people use automated-teller machines (ATMs) in a year are…

A: The mean is 40 and the standard deviation is 11.

Q: The combined math and verbal scores for females taking the SAT-I test are normally distributed with…

A: Given,Mean, μ = 998Standard deviation, σ = 202If a college includes a minimum score of 1100 among…

Q: The yearly price of gasoline has change. The mean mileage for this year is 10000 km. Motorists have…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: A psychologist wants to estimate the amount of math anxiety that the population of high school…

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Q: In the new show The Last of Us there is a fungal infection that spreads rapidly in humans. An…

A: This question is about an epidemiologist who is researching the rate of spread of a fungal infection…

Q: In a recent study, the CDC reported that diastolic blood pressures of adult women in the United…

A: Given that,  Mean = 92 Standard deviation = 9.25 , and X = 60   Let X be a diastolic blood pressure…

Q: On the final exam, Jenny’s class had an average of 62.4% with a standard deviation of 10.4. If the…

A: The number of students in the class is The average score of the class is The standard deviation is…

Q: An advertising agency that serves a job radio station wants to estimate the mean amount of time that…

A: Here, σ=45, confidence level=90%, E=5.

Q: Fast Auto Service provides oil and lube service for cars. It is known that the mean time taken for…

A: Normal distribution is a continuous distribution which has many real life applications. Normal curve…

Q: Another P-value Have harsher penalties and ad cam-paigns increased seat-belt use among drivers and…

A:

Q: The mean number of English courses taken in a two-year time period by male and female college…

A: Given: The mean number of English courses taken in a two-year time period by male and female college…

Q: The average student-loan debt is reported to be $24,805. History has shown that the standard…

A: Sample size(n)=53Sample mean x-=24035Sample population standard deviation (s)=3250Population mean…