A manufacturer knows that their items have a normally lifespan, with a mean of 9.8 years, and standard deviation of 2.8 years. The 7% of items with the shortest lifespan will last less than how many years? Give your answer to one decimal place.

Q: Heights of women are normally distributed with a mean of 63.2 in. and a standard deviation of 1.9…

A: We have given information, Let X denote the heights of women are normally distributed. With the…

Q: QUESTION 17 Suppose an internet marketing company wants to determine the current percentage of…

A: The sample of 1000 customers is selected and 120 of them click on ads on their smartphones.

Q: scenario and decide which (if any) of the assumptions or conditions for using the Central Limit…

A: Assuming that the appliances are homogenous and the inspector selects the washers randomly, there…

Q: Prop XYZ is coming up on the ballot. A polling agency takes a random sample and finds that the 52%…

A: Suppose p is the population proportion of voters that will support the ballot.

Q: For what reason does testing only reveal the presence of faults and not their absence?

A: Given data  :  For what reason does testing only reveal the presence of faults and not their absence…

Q: Read the scenario and decide which (if any) of the assumptions or conditions for using the Central…

A: The Central Limit Theorem (i.e., CLT) assumed that for a sufficiently large sample size (i.e.,…

Q: Safeway Foods is redesigning the checkout lanes in their supermarkets throughout the Midwest, and…

A: Suppose μ1, μ2 are the population means of checkout times of Design 1 and Design 2, respectively.

Q: Find the area of the shaded region. The graph depicts the standard normal distribution of bone…

A: We have given information, The graph depicts the standard normal distribution of bone density with…

Q: Histograms O True O False are considered good graphs AND they are used for Qualitative data.

A: We have the statement  Histogram are considered good graphs and they are used for Qualitative data

Q: a) Calculate an estimate for the mean of the waiting times, by using an appropriate approximation to…

A: Here waiting time of the 128 customers is given. Waiting time f 0-30 29 30-60 17 60-90 17…

Q: Continuation of the previous exercise I sent a picture about. Suppose now that n = 4 and it is…

A: This question requires us to calculate the value of the function A. = f (y; A) at a few points…

Q: A survey found that​ women's heights are normally distributed with mean 63.6 in and standard…

A: Answer  Given  Mean =63.6 standard deviation =2.5 We know that Z-score:  Z =[x-mu]/[σ] z*σ =[x-mu]…

Q: In the digital age of marketing, special care must be taken to ensure that programmatic ads appear…

A: Given data: Marketing Managers Marketing Research Advertising 4 7 5 3 7 6 2 6 5 3 6 4…

Q: Fatema wants to estimate the mean time spent on social media platforms per day, by ZU students. She…

A: Here we have to estimate confidence interval for the population mean

Q: QUESTION 28 Assume that the time spent by students in extra curricular activities per week is…

A: Given,standard deviation(σ)=11.13 hoursSample size(n)=28

Q: Formulate but do not solve the problem. In a survey of 1000 adults aged 18 and older, the following…

A: Given that 360 answered "no" or "not sure."

Q: Polyunsaturated fatty acids in the diet favorably affect several risk factors for cardiovascular…

A: Given that: Subject Baseline SBP 1-month SBP 1 119.67 117.33 2 100 98.78 3 123.56 123.83…

Q: Employees in a company experience distractions (phone calls, emails, unscheduled visits "etc".)…

A:

Q: A rugby team from the country of Atlantis is formed by randomly drawing from its population. The…

A: Given that: Population mean, μ=165 Population standard deviation, σ=10 Sample size, n=26

Q: Find the area of the shaded region. The graph depicts the standard normal distribution of bone…

A: The given mean is 0 and standard deviation is 1. The shaded region is z=-0.99 to z=1.28.

Q: A company prices its tornado insurance using the following assumptions: • In any calendar year,…

A: Given that: Success probability, p=0.14 Sample size, n=14

Q: For a population with a mean of 75 and a standard deviation of 4, find the Z Score for an X Score of…

A: Given,population mean(μ)=75population standard deviation(σ)=4Raw score(X)=73

Q: How do you set up the model to use Goal Seek?

A: Monica takes one hour  Hilary takes one hour  If they both work together than how much time they…

Q: K Assume that females have pulse rates that are normally distributed with a mean of μ = 76.0 beats…

A:

Q: of 1.7 hours. What is the probability that a randomly selected group of 35 high school students get…

A: Let X be the random variable that the sleep hours of teenagers that attend public high schools.…

Q: What is the correlation between a person's income and their level of education, and to what extent…

A:

Q: To test whether the mean time needed to mix a batch of material is the same for machines produced by…

A: Given data: 1 2 3 21 30 16 27 28 15 25 33 19 23 29 18

Q: Based on data from the National Health Survey, women between the ages of 18 and 24 have an average…

A: The mean is 114.8 and standard deviation is 13.1.

Q: A researcher was interested in studying the best way to teach suturing and casting to surgical…

A: I used Minitab for my calculations.

Q: Students checked several pairs of jeans to see if the size on the label matched the actual size of…

A:

Q: The lengths of a professor's classes has a continuous uniform distribution between 60.0 min and 90.0…

A: We have given thata = 60 , b = 90The distribution is uniform  => X ~ U(a, b)X ~ U(60, 90)

Q: For the standard normal distribution, find the z score that gives the 27th percentile. Round to at…

A: We have given information, The random variable Z follows a standard normal distribution. i.e. Z~N0,1

Q: Consider the accompanying data on breaking load (kg/25 mm width) for various fabrics in both an…

A: Given data: U A 36.2 28.5 55.0 20.0 51.5 46.0 38.9 34.0 43.2 36.5 48.8 52.5 25.6…

Q: A certain typing agency employs two typists. The average number of errors per article is 3.1 when…

A: Let A be the event that the article is typed by the first typist, B be the event that it is typed by…

Q: . Calculate the standard error.  2. Find the critical value for the test statistic, assuming alpha…

A: Given that Sample size (n)=10 Sample mean (x- )=6.7  Sample standard deviation (s)=1.22  We have to…

Q: n 1997 Fuller and coworkers at Texas A&M University estimated the operating costs of cotton gin…

A: In 1997 Fuller and coworkers at Texas A&M University estimated the operating costs of cotton gin…

Q: Consider the experiment of tossing a coin 2 times, with equal chance of obtaining H (head) and T…

A: The experiment is of tossing a coin twice. Let head denote 1 and tail denote 0. Let X = the no. of…

Q: Additional Materials fectly symmetrical distribution, when would the mode be different from the mean…

A: Given that following data are the distances between 20 retail stores and a large distribution…

Q: 6) The the probability it will rain Saturday is 40%, probability it will rain Sunday is 60%% There's…

A: We have given that P(Saturday)=40%=0.40 P(Sunday)=60%=0.60 P(Saturday and Sunday)=20%=0.20

Q: Credit card balances of all customers in a certain bank are right-skewed. To estimate the mean…

A: Suppose µ is the population mean balance for all customers.

Q: Assume that a sample is used to estimate a population mean . Find the 95% confidence interval for a…

A: given data n = 41x¯ = 54.6σ = 7.395% ci for μ = ?

Q: A genetics experiment involves a population of fruit flies consisting of 2 males named Bart and…

A: Given that: 2 Males named Bar and Christopher. 2 Females named Debbie and Elena

Q: QUESTION 9 Which of the following statements is not true The standard error of the sample measures…

A:

Q: chi" disks are used to determine the clarity of natural wate is lowered into the water until the…

A: To determine whether the two disks yield significantly different values, we can perform a paired…

Q: In the United States the ages 13 to 55+ of smartphone users approximately follow a normal…

A: GivenMean(μ)=37.5standard deviation(σ)=13.9

Q: Calculate the measures of central tendency for the grouped data and the measures of dispersion for…

A: It is given that- Total observations =40 Minimum value =13 Maximum value =48 class interval=6

Q: The following output is from Excel. Executives rated the service they received in a variety of…

A: The question is about ANOVA Given : F = 11.64423 p value = 0.000148     To find : Test the claim…

Q: Application of z-test/t-test 1. The college students in a university go through an average of 500…

A: The question is about hypo. testing Given : Popl. mean no. of disposable cups in a year ( μ ) = 500…

Q: Let X be a joint Gaussian random vector X E[X] = [] ; Ex= = X 1 2 with mean and covariance tiven by:…

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

Q: Determine whether the statement makes sense (or is clearly true) or does not make sense (or is…

A: Introduction The absolute error gives an indication of the measurement's uncertainty.