A large hospital wants to estimate the average length of time previous patients who have had surgery have remained in the hospital. The standard deviation of the lengths of stay of all previous surgery patients is known to be 7.4 days. A random sample of 50 surgery patients' records is obtained, and the mean length of time these patients stayed in the hospital was 6.2 days. A. Find a 95% confidence interval for the mean length of time all surgery patients stay in the hospital.

Q: what is the step to number 4?

A: 4) Given that, Consider that 95% of all sample means will fall between two values. That is,

Q: Draw the normal curve. The daily income of a Covid-19 contact tracer in the Philippines is normally…

A:

Q: The accompanying specific gravity values describe various wood types used in construction. 0.34 0.35…

A: Given that: 0.34 0.35 0.36 0.36 0.37 0.38 0.40 0.40 0.40 0.41 0.41 0.42 0.42 0.42 0.42 0.42…

Q: According to previous studies, 12% of the U.S. population is left-handed. Not knowing this, a high…

A:

Q: D A food nutritionist provides a program to help their clients lose weight and asks to investigate…

A: Given Information: Consider the given data: Patient Weight 1st 2nd 3rd 1 155 145 140 2 187…

Q: A spinning device has 5 numbers, 1, 2, 3, 4, and 5, each as likely to turn up as the other. A person…

A: Given problem Given that   A spinning device has 5 numbers, 1, 2, 3, 4, and 5, each as likely to…

Q: Class Intervals Class Boundaries 36-40 35.5-40.5 31-35 30.5-35.5 26-30 25.5-30.5 21-25 20.5-25.5…

A: Median When a data collection is sorted in chronological order, the median is the middle value. If…

Q: Exerci Let X₁,..., Xn b- conjugate family f (a) Find the poste (b) Calculate the

A: here given,  X1,X2,........,.Xn be iid poisson (λ) and let λ have a gamma(α,β) distribution, the…

Q: 41. Find G.M. of the following data. 30 35 40 45 Marks No. of students 8 7 15 10 50 55 60 6 8 6

A:

Q: Explain the most important biostatistical principles that underpin comparing means of two…

A: i) ANOVA: The analysis of variance test is used to compare the means of more than two groups. In one…

Q: A conference consists of 5 sessions: A, B, C, D, and E. Here are the costs of the sessions. Session…

A:

Q: HYPERGEOMETRIC DISTRIBUTION SOLTIONN NEEDED A foreign student club lists as its members 3…

A: Given that Total student =12( 3 Canadians, 2 Japanese, 4 Italians, and 3 Germans)

Q: Create a table wherein it shows your score or your . class interval . class width • frequency •…

A: Consider the data: 11, 4, 27, 18, 18, 3, 24, 22, 11, 22, 18, 11, 18, 7, 29, 18, 11, 6, 29, 11

Q: 40 47 45 45 44 44 46 Find the mean cost. Select the correct choice below and, if necessary, fill in…

A:

Q: X~ Bin (₂0) 9. @0, 1 other MSP Posterior probablit 17 (0) Y/N Ⓒ = [0, 1]

A:

Q: If X is a normally distributed random variable with a mean of 80 and a standard deviation of 12,…

A: Given that.   X~N( μ , ?^2 )   μ=80     , ?=12   Z-score =( x - μ )/?

Q: Check Yourself! Solve the given problem: 1. In an attempt to assess the effect of the length of time…

A:

Q: 1. Construct a Frequency Distribution Table of the scores of 30-students in Math 7 section Joaquin.…

A: The given dataset is as follows 35 28 34 8 41 40 43 13 29 35 46 39 21 19 31 33 39 51 57 45 18…

Q: 11. Find the 30th percentile of the total examinees. B. 9,830 A. 9,645 12. Find P80 of the days…

A: 11) The objective is to find 30th percentile of the total examinees. Arrange the data in ascending…

Q: 6. It is known that the tensile strength of a plastic increases as a function of the time it is heat…

A:

Q: The times listed are the top twelve prelim times for the 100 Backstroke at a regional meet. 53.61,…

A: Solution

Q: A fruit juice franchise company has a policy of opening a new fruit juice stand only on those areas…

A: One sample t-test is used when the sample size is less than 30 and the parent population is normally…

Q: A farmer recorded the weights of 25 randomly selected pigs from his farm. A 95\% confidence interval…

A: Given problem Given that   A farmer recorded the weights of 25 randomly selected pigs from his…

Q: Draw the normal curve. Suppose that the amount of time it takes the Bureau of Internal Revenue…

A: Solution-: Given: μ=14,σ=1.5 We want to find x such that, P[X<x]=0.45

Q: For items 7 to 10, consider the scores 70 Grade 10 students in Mathematics Test. Scores Less than…

A: Given data is  Scores Frequency Lower Boundaries Less than CF 95-99 3 94.5 70 90-94 6 89.5 67…

Q: Over the period of a month, you trap and tag 15 deer in a forest, and mark them with tags. You set…

A: From the stated information, it is interpreted that: Initially tagged no. of deer = 15. No. of…

Q: Answer the given problem. Use the steps in hypothesis testing when presenting the results. A health…

A: Use the Excel And Perform the One way anova Followings are the steps to perform the One way anova…

Q: Please answer 1.5 for this question

A: Measure of dispersion is used to measure the spread of the data set. Coefficient of variation is…

Q: craft not discovered do not have such a locator. Suppose a light aircraft has disappeared. (Round…

A: Given Seventy-eight percent of the light aircraft that disappear while in flight in a certain…

Q: % percent of households x 0 1 2 3 4 5 % 3 11 28 39 12 7 Compute the mean of the distribution 1.28…

A:

Q: Physicians say that the normal temperature of a person's body is 37 degrees Celsius. A mean of 36.5…

A: It is given that Sample size n = 10 Sample mean M = 36.5 Sample SD s = 2 Level of confidence = 99%

Q: For a certain battery company, the life span of the batteries follows a normal distribution. What…

A: Here's, mean is 35.4 hours and standard deviation is 90 minutes or 1.5 hour. We will use z-standard…

Q: A new type of fabric is claimed to be wrinkle-free. There are other wrinkle-free fabrics in the…

A:

Q: Given the function (a) fx.y(x,y): = { b(x + y) [b(x+y)² =2<x<2 and -3<y<3 0 elsewhere Find the…

A:

Q: The table below contains the covariance matrix of stock returns and the market. Assume that the…

A: Given data, The table below contains the covariance matrix of stock returns and the market. Assume…

Q: Express the confidence interval 15.1 % ± 6.5% in the form of an inequality. Fill in blanks with…

A:

Q: The accompanying specific gravity values describe various wood types used in construction. 0.34 0.35…

A: The objective is to construct a stem and leaf plot using repeated stems.

Q: Each experiment compares three treatment conditions, and each experiment uses separate samples of n…

A: Since the standard deviation for Experiment A is higher, this results in smaller MSbetween.

Q: 43. Find Harmonic mean of the following data Values 2754 475 75 5 0.8 0.08 0.005 0.0009

A:

Q: Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 67…

A: Given Mean=67 Standard deviations=3 P(64&lt;X&lt;70)=?

Q: The marketing manager of a firm that produces laundry products decides to test market a new laundry…

A:

Q: 2. Let X denote the reaction time, in seconds, to a certain stimulus and Y denote the temperature…

A: Let X denote the reaction time, in seconds, to a certain stimulus and Y denote the temperature (°F)…

Q: The students in an AFDA class have a mean height of 66 inches and a standard deviation of 7 inches.…

A:

Q: Illustration 17.30. A distribution is known to be normal. The quartiles are 8.64 and 14.32.…

A:

Q: Why is it that the "COVID curve" cannot be considered as a normal distribution?

A: Solution-: Why is it that the "COVID curve" cannot be considered as a normal distribution?

Q: Random variables X and Y have density functions 1 fx(x) =-[u(x)−u(x-a)] and fy(y) = bu(y)e-by where…

A:

Q: An insurance company offers four different deductible levels-none, low, medium, and high-for its…

A: Researchers use probability table to represent probabilities of occurrence of two events.

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 9.6…

A: Let X denote the  items lifespan and it follows normal distribution with a mean of μ=9.6 years, and…

Q: 4. Which of the following statements about measures of variability must always be true if the…

A: Options c and d are correct.

Q: 20. Suppose that 21% of people own dogs. If you pick two people at random, what is the probability…

A: Given,The probability people own dogs is 0.21