A programmer plans to develop a new software system. In planning for the operating system that he will​ use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 99% confident that his estimate is in error by no more than five percentage points question mark   ​a) Assume that nothing is known about the percentage of computers with new operating systems.   ​(Round up to the nearest​ integer.)   ​b) Assume that a recent survey suggests that about 92​% of computers use a new operating system.   ​(Round up to the nearest​ integer.)

Q: I don't understand with the numbers clutter together

A: Virginia 35 Maryland 28 Delaware 23 Total residents = 86 Two people are chosen

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A: GivenMean(μ)=1073standard deviation(σ)=250sample size(n)=43

Q: At a recent meeting at the American College of Asthma, Allergy, and Immunology, researchers reported…

A:

Q: The lifetime of a certain brand of electric light bulb is known to have a standard deviation of 46…

A: Given that  Sample size n =90 Sample mean=489 Population standard deviation =46

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A: given data P(A) >0P(B) >0B⊆Awhich of the given will true?

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A: given data normal distributionμ = 74σ = 12.5

Q: According to a 2009 Reader's Digest article, people throw away approximately 10% of what they buy at…

A: given data  n = 100 p = 0.10 P(p^>0.02) = ?

Q: According to the records of an electric company serving the Boston area, the mean electricity…

A: The mean is 1650 kilowatt-hours and standard deviation is 320 kilowatt-hours.

Q: A quiz contains 5 true/false questions and 5 multiple choice questions, where each multiple choice…

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A: Given that A main goal in statistics is to interpret and understand the meaning of statistical…

Q: How many simple random samples of size 4 can be selected from a population of size

A: 14. Population size is 8. number of samples of size 4. Formula: nr=n!r!n-r!

Q: There is not sufficient evidence to support the claim that the standard deviation of pulse rates of…

A: It is given that  Significance level, α = 0.01 P-value = 0.3876

Q: can you write this out, in text this is confusing

A: The standard deviation is $40.

Q: table below. How many students chose basketball? Tally 0 Sport Hockey Football ||||||||||||| Soccer…

A: It is given that the Ivanna asked her classmates to choose their favourite sport.

Q: Assume that all​ grade-point averages are to be standardized on a scale between 0 and 6. How many​…

A: The standard deviation is 1.5 and confidence level is 95%.

Q: An urn contains 20 marbles of identical size where 10 marbles are green, 8 marbles are red and 12…

A: Given that Total marbles = 20 Green marbles= 10 Red marbles = 8  Blue marbles= 12

Q: Renal Disease The mean serum-creatinine level measured in 12 patients 24 hours after they received a…

A: Given information: Sample size(n)=12Sample mean (x¯)=1.2sample standard deviation(s)=0.6Level of…

Q: *7.4 Compute a two-sided 95% CI for the true mean serum-creatinine level in Problem 7.3.

A: Here, x is 1.2, n = 12, s = 0.6, and CL = 0.95. Thus, α=0.05=1-0.95.

Q: 17. Draw a multiple bar graph for the following data which represented agricultural produc- tion for…

A: The following data represents agricultural production for the period from 2010 to 2013. Year Food…

Q: The probability that a patient does not recover from a certain disease is 9%. Suppose 19 people are…

A: Given,n=19q=0.09p=1-0.09=0.91A random variable X~Binomial(n=19 , p=0.91)P(X=x)=Cx0.91x0.0919-x…

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A: The number of groups is 4.

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A: Given that  Level of significance =alpha =0.01

Q: Given the following stem-and-leaf plot/diagram of quiz scores. The 7th decile is 1 | 03 21 2224 3 |…

A: Solution-: We want to find 7th decile=?

Q: Which of the following is not true regarding internal validity and external validity 1. It’s OK for…

A: Validity of a research study means that how well the findings of that study among the study subjects…

Q: Listed below are the amounts of net worth​ (in millions of​ dollars) of the ten wealthiest…

A: Solution:  The sample of n=10  amounts of net worth​  data is given.

Q: The print on the package of 100-watt General Electric soft-white light-bulbs says that these bulbs…

A: Note- Since you have posted a question with multiple sub-parts, we will solve the first three…

Q: Yessica thought that there was a correlation between the amount of time students slept the evening…

A:

Q: The average hours of sleep per school night for high school students is 7 hours with a standard…

A: Mean=7, standard deviations=0.5  P(7<X<7.5)=?

Q: A large bank in South Africa knows that the average credit card debt owed by their card holders is R…

A: Given,mean(μ)=R 1073standard deviation(σ)=R 250sample size(n)=43

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 24 for the population…

A:

Q: Students estimated the length of one minute without reference to a watch or​ clock, and the times​…

A:

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: given data  normal distribution μ = 100σ = 15P(x<z) = 0.99x =?

Q: Consider the partially completed ANOVA summary table. Use the table to answer the questions below.…

A: The table shows the partially completed ANOVA summary table.

Q: You draw a simple random sample of 27 items from a Normal Population that has a standard deviation…

A:

Q: A sales representative for a publishing company recorded the following numbers of client contacts…

A: Here the number of observations N = 36 Here rule 1 is not given in the question. Therefore, choosing…

Q: A food safety guideline is that the mercury in fish should be below 1 part per million​ (ppm).…

A: Solution-: Given data: 0.54, 0.78, 0.09, 0.94, 1.29, 0.58, 0.92 What is the confidence interval…

Q: Suppose 100 independent random y values are each distributed Pois(1) – poisson distribution with a…

A: Given that  n= 100  And X ~ Pois (1)

Q: A teacher from the College of Business Administration of UPang is using the Test-Retest Method to…

A: The scores of 10 students in two tests are given. We have to compute Spearman rank correlation…

Q: In a recent tennis tournament, women playing singles matches used challenges on 136 calls made by…

A: We have given thatn = 136x = 38p̂ = x/n = 38/136 = 0.2794Significance level (α) = 1 - 0.99 =…

Q: A college claims that the proportion, p, of students who commute more than fifteen miles to school…

A: From the provided information, Sample size (n) = 260 From which 47 commute more than fifteen miles…

Q: increase is what percent of the original number? (This is ge.) t in decimal form with three decimal…

A:

Q: 64. Production Line Fill Weights. A production line operates with a mean filling weight problem and…

A: Note: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we…

Q: Assume that females have pulse rates that are normally distributed with a mean of μ = 75.0 beats per…

A: We have given that Mean(µ) = 75Standard deviations (σ) = 12.5X ~ N (µ, σ )= N(75, 12.5)

Q: A sample of 22 households uses an average of 346.2 gallons of water per day, with a sample standard…

A: The sample size is 22, sample mean is 346.2 and sample standard deviation is 50.5.

Q: 7.5.5. Let X be a random variable with the pdf of a regular case of the exponential class, given by…

A: Given the random variable X with the pdf of a regular case of the exponential class,…

Q: Engineers want to design seats in commercial aircraft so that they are wide enough to fit 90% of all…

A: GIVEN DATA μ = 14.3σ = 0.9find P90 = ?

Q: Calculating Percent Change Determine the Percent Change for each of the following. Express your…

A: As per the Bartleby guildlines we have to solve first three subparts and rest can be reposted.....…

Q: Among college students, the proportion p who say they're interested in their congressional…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub- parts for…

Q: The mean birthweight of an infant is thought to be associated with the smoking status of the mother…

A: Solution: Given information: k=4 groups  Goup1 has 7 observation Group 2 has 5 observation Group3…