3. The following represents a sample of 15 commute times for workers who live in Austin ale viadil 120M 7 12 12 12 14 15 15 21 23 25 30 32 40 45 50 a. Find the range. b. Use the range rule of thumb to approximate the standard deviation. c. Use technology to calculate the standard deviation. gniwollot 252 10 A 225ba up to 15

Q: company is comparing methods for producing pipes and wants to choose the method with the least…

A: Solution: First we find sample means and standard deviation for method 1 and 2.  n=12 Sample size of…

Q: Refer to the accompanying data display that results from a sample of airport data speeds in Mbps.…

A: given data, (13.046,22.15) x=17.598 Sx=16.01712719 n=50we have to answers the subparts a to d

Q: A poll asked 998 adults "If purchasing a used car made certain upgrades or features more affordable,…

A:

Q: In this exercise involving paired differences, consider that it is reasonable to assume the…

A: Given information:   Additive Car 1 2 1 19.12 17.05 2 24.56 20.77 3 23.03 23.57 4 18.15…

Q: Telephone Calls A researcher knew that before cell phones, a person made on average 3.1 calls per…

A: Given n=26 Alpha=0.10 Standard deviation=0.6

Q: You are testing the claim that having lights on at night increases weight gain (abstract). A sample…

A: Solution: First we find sample means and standard deviation.  x1=∑x1n1=67.3210=6.732…

Q: Researchers are testing shoes for comfort. They recruit more than 750 adults and randomly assigned…

A: Given: About 750 adults are recruited. Half of them are randomly assigned to a name-brand shoe.…

Q: The following sample observations were randomly selected. (Round intermediate calculations and final…

A: The Linear regression equation is computed as                                               y^ = a +…

Q: The trade magazine QR routinely checks the drive-through service times of fast-food restaurants. A…

A: Given: Confidence level = 99% n = 719 Confidence interval = (159.1,  162.1) Formula Used: Margin of…

Q: Refer to the accompanying data display that results from a sample of airport data speeds in Mbps.…

A: Given: n = 50 X = 17.598 sx = 16.01712719 Formula Used: df = n-1

Q: Question 5 A population of values has a normal distribution with μ random sample of size n = 215.…

A: In question,  Given that a random is normally distributed with mean 233.1 and standard deviation of…

Q: Assume that a simple random sample has been selected from a normally distributed population and test…

A: Suppose μ is the population mean time between failure.

Q: In each scenario, identify the population, the sample, and any population parameters or sample…

A: Population is the whole set of observation that involve in the study. Sample is the any fraction of…

Q: The test statistic of z= -1.61 is obtained when testing the claim that p=1/2. a. Using a…

A: We have given that z = -1.61 claim that p = 1/2 This is two tailed test

Q: A manufacturer is interested in the output voltage of a power supply used in a PC. Output voltage is…

A: Given Information: Standard deviation σ=0.14 H0:μ=5 H1:μ≠5 Sample size n=7

Q: istributed. Use the P-value method with tables. of 5 he hypotheses and identify the claim. = 24 not…

A: Given N=27 Xbar=22.2 Standard deviation=3.7

Q: The inflammation caused by osteoarthritis of the knee can be very painful and can inhibit movement.…

A: Given that: Leech (Group 1): x¯1=52.4s1=13.9n1=24 Topical gel (Group 2): x¯2=52s2=16.6n2=27

Q: A textile fiber manufacturer is investigating a new drapery yarn, which the company claims has a…

A: Given: Mean μ=12 Standard deviation σ=0.5 Sample size n=4 H0:μ=12 H1:μ<12

Q: Classify the following variable as a qualitative or quantitative. Letter grade of an exam. O…

A: Qualitative variables: Qualitative variables measures of types and may be represented by a name,…

Q: 2) A company was experiencing a chronic weld-defect problem with a water-outlet-tube assembly. Each…

A: Let  x 0.29 0.104 0.207 0.145 0.104 0.124

Q: The weight of 45 watermelons from a farm is shown below. Weight Frequency 11-15 4…

A: Given N=45

Q: Listed below are the overhead widths​ (in cm) of seals measured from photographs and the weights​…

A: Followings are the explanation of the question Use the Excel and format the below table

Q: 10, 1, 13, 9, 5, 9, 2, 10, 3, 8, 6, 17, 2, 10, 15 a) Find the mean b) Find the median

A:

Q: Claim: The standard deviation of pulse rates of adult males is less than 11 bpm. For a random sample…

A: given data,claim : σ<11n=131s=10.2test statistics=?

Q: Find the standard deviation, σ, for the binomial distribution which has the stated values of n and…

A:

Q: Directions: paper. I. Descriptive Statistics Income (P1000s) 37 34 67 50 67 54 30 50 67 34 Mean…

A: A) Excel can be used to find the summary statistics as follows: a) Enter the data. b) Go to…

Q: A population of values has a normal distribution with μ = 213 and o 96.5. You intend to draw a…

A:

Q: Q1: Placebo effect of exercise In a high-profile research study, Crum and Langer (2007) performed an…

A: It is interpreted that, the test involves, 44 subjects in each of the groups, i.e., the treatment…

Q: Sick Days in Bed A researcher wishes to see if the average number of sick days a worker takes per…

A:

Q: The test statistic of z= -1.92 is obtained when testing the claim that p<0.54. a. Using a…

A: GivenTest statistic(z)=-1.92claim is that p&lt;0.54

Q: Today, the waves are crashing onto the beach every 5 seconds. The times from when a person arrives…

A: Given,A random variable X~U(0,5)f(x)=15    ;  0≤X≤5

Q: A simple random sample of size n is drawn. The sample mean, ¿, is found to be 17.7, and the sample…

A: Solution: Given information: x =17.7 Sample mean s= 4.3 Sample standard deviation

Q: Q₁: If X₁, X2, X₁ are random sample such that f(x;) = 0xº, 0<x< 1, then find the method of moment…

A:

Q: A college entrance exam company determined that a score of 25 on the mathematics portion of the exam…

A: Given information Hypothesized mean µ = 25 Sample size (n) = 150 Mean x̅ = 25.8 Standard deviation…

Q: A hypothesis test of the null hypothesis μ-135 yields a z-test statistic of 1.05. What is the…

A:

Q: A researcher claims that exactly 40 % of all adults in the U.S. use their cell phone for most of…

A: The question is about hypo. testing and confidence interval Given : Popl. prop. of all adults use…

Q: If n=22, x=40, and s=3, find the margin of error at a 90% confidence level using the critical value…

A: Given data,n=22x¯=40s=3CI=0.90ME=?

Q: Heights for teenage boys and girls were calculated. The mean height for the sample of 73 boys was…

A: given data, n1=73x¯1=167s12 =71s1=8.4261n2=47x¯2=180s22 =66s2=8.124

Q: The random variable X, Y and Z have the following joint probability distribution: X 1 1 1 1 2 2 y 1…

A: as per our policy we can answer only 3 sub parts rest you can post again we will answer Thank you…

Q: What would you choose as the estimate of the parameter for the Poisson distribution? (Enter your…

A: given data  data value(x) no. of observation(f) fx 0 10 0 1 18 18 2 12 24 3 2 6 4 3 12…

Q: Put these numbers in order from greatest to  least. 2.3 3.18 2.6 2.8

A: From the above data  We are given that the 4 numbers 2.3 3.18 2.6 2.8

Q: Problem 5) The cumulative distribution function of random variable Vis: v <-5 a) What is E[V]? b)…

A: Given that: The cdf of random variable V is: FVv=0                    v&lt;-5v+52144    -5≤v&lt;71…

Q: A construction engineer is interested in testing the hypothesis that the processing times for three…

A: Given Information: Consider the given dataset: Machine I Machine II Machine III 25.40 23.40…

Q: Test the given claim. Assume that a simple random sample is selected from a normally distributed…

A: a.   Suppose σ is the true standard deviation of the errors of the new production method.

Q: into each other to a group of participants. Later, some participants were asked: "How fast were the…

A: Comment: As per the our company guidelines we are supposed to answer only first question. Kindly…

Q: According to the survey the number of stat students was: n = 62 and the number of students born in…

A: Given that,  n=62 X=30 We have to find p cap, distribution of p cap , confidence interval and margin…

Q: In an effort to counteract student cheating, the professor of a large class created four versions of…

A: Given Information: Group Sample size  Sample mean Standard variance Version A 76 157.1 426.4…

Q: Test the claim at the 0.01 significance level. Select the correct final conclusion. There is…

A: The hypothesized mean is 14 oz.

Q: Fully write out the regression equation

A: Solution: Given information: n= 8 observation  k= 3 independent variables

Q: Test the claim that the proportion of college students who are vegetarians is less than 31%. A…

A: Givensample size(n)=1000sample proportion(p^)=0.277significance leve(α)=10%=0.10