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 95​%confident that his estimate is in error by no more than one percentage point?     ​a) Assume that nothing is known about the percentage of computers with new operating systems. n=____ ​(Round up to the nearest​ integer.)   ​b) Assume that a recent survey suggests that about 95​% of computers use a new operating system. n=____ ​(Round up to the nearest​ integer.)

Q: evaluate the probability of randomly scanning a barcode that results with a vowel for the beginning…

A: here given, Lazada uses barcode to properly monitor their logistics. scanned barcode results to 3…

Q: Suppose that {Yi} is a white noise process and that n = a simulation to study the sampling variation…

A: Given Information: Consider Yt is a white noise process.  N=400

Q: 42% of elderly people have high blood pressure. If a sample of 200 is taken and a success is…

A:

Q: -Study and analyze ne number of shoes sold per day at a retail store is shown in the table below.…

A: Given that  X 19 20 21 22 23 P(X) 0.4 0.2 0.2 0.1 0.1 Mean = E(X)=∑X.P(X) Var(X)=E(X2) -…

Q: To test the claim that the resistance of electric wire can be reduced by more than 0.050 ohm by…

A: From the provided information,

Q: We wish to perform a hypothesis for the difference in mean values. Our Ho is that they are equal and…

A: We have given that H0 is that they are equal and  our Ha is that they are not equal i.e H0 : µ1 = µ2…

Q: . Let X be the distance in kilometers that a tyre travels before being replaced. Historical data…

A:

Q: A random sample of nine students was selected to test for the effectiveness of a special course…

A: For the given data Find confidence interval for the mean mud

Q: You think that there might be a relationship between stress for Middle Schoolers and the number of…

A:

Q: The minimum price is $ and the maximum price is $

A: here A small publisher wishes to publish self-improvement books. After a survey of the market, the…

Q: Suppose a life insurance company sells a $160,000 one-year term life insurance policy to a…

A: Given that

Q: Time required in hours Finishing Product of Assembly Profu in Rs. 20 12 80 A 14 15 60 B C 15 14 30…

A:

Q: Example 8. A company has two plants, A & B, each designed for manufacturing 10 biscuit packet and 15…

A:

Q: Star Error of the Mean Is Population Variance Problem/Situation Givern (Known or Unknown) Formula to…

A: Part a. For 5 . population mean (μ)=50.5Polation variance (σ2)=17.64sample size (n)=45Sample mean…

Q: You decided to conduct Bonferroni post hoc analyses in MS Excel. Inspect the MS Excel output and…

A: Since we only up to three sub parts of a problem, we'll answer first three sub-parts. Please submit…

Q: Note: Attempt all Questions Q1. Solve the following linear system using Gauss elimination method: a+…

A:

Q: 6. The Cream Pan bakery often runs out of olive bread before I get there. Suppose their daily demand…

A: The random variable loaves of olive bread follow normal distribution. We have to find loaves of…

Q: Show necessary calculation/justification for each answer.  a) In regression analysis, the residuals…

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

Q: A radio producer measures the duration of 60 randomly selected songs played on the radio station's…

A: Given that, x¯=4.27,s=1.22,n=60 The degree of freedom is, df=n-1    =60-1    =59 Critical value:…

Q: Find the probability that a person selected has blond hair if it is known that the person has green…

A: HERE USE ,  given table and Baye's rule  here total persons in given table is 500

Q: Listed below are the lead concentrations in μ​g/g measured in different traditional medicines. Use a…

A: Given,sample size(n)=10sample mean(x¯)=9.5+15+9+21.5+18.5+22.5+9+10+9.5+4.510sample…

Q: Please help me fill the blanks, thank you! Combination Coin 1,Coin 2 OV EV D in % H,H…

A:

Q: 1. Draw the stem and leaf diagram for the following data 1, 44, 46, 47, 49, 63, 64, 66, 68, 68, 72,…

A: Given that  The data are -16,1,44,46,47,49,63,64,68,68,72,72,75,76,81,84,88,106

Q: comparison of single time estimate and three-time estimate

A: Here we should compare and contrast the single time estimate and three activity time estimate.…

Q: 6. To the left of z=-1.38

A: As per company guidelines I solved only one question  .thank you

Q: People with O-negative blood are called "universal donors" because O- negative blood can be given to…

A:

Q: 3. In the U.S. air pollution data are reported for 57 cities. Construct a frequency distribution and…

A:

Q: Four coins are tossed. Let Z be the random variable representing the number of heads that occur.…

A: Given: Four coins are tossed. The random variable Z denotes the number of heads that occurs.

Q: X=2 4 5 Y=1 1/18 1/18 1/18 3 1/9 1/9 1/18 4 1/9 2/9 2/9 3.     Find Marginal PMF of X…

A: Given that  The joint probability mass function of X and Y is    X=2 4 5 Y=1 1/18…

Q: The Normal Distribution Activity For Data Set 2 Mean = 2.00 Variance= 4.5263 Standard Deviation =…

A: Let X be the random variable from normal distribution with mean (μ) = 2.00 and standard deviation…

Q: a) Are the outcomes of the two contracts bids independent? Explain. OA. Yes, the outcome of the…

A: HERE  AS PER GUIDELINES I HAVE CALCULATED 3 SUBPARTS  Your company bids for two contracts. You…

Q: MO21. An Article in the Journal of Sports Science (1987, Vol. 5, pp. 261-271) presents the results…

A: Confidence interval is often used to test the null hypothesis.

Q: 3. A gym has about 2000 members, 60% of whom are younger than 50 and 40% of whom are 50 and above.…

A:

Q: Based on the information in the ANOVA table below, how many groups were in this study. df MS…

A:

Q: Shell lengths of sea turtles. Refer to the Aquatic Biology o Vol. 9, 2010) study of green sea…

A: In hypothesis testing, there are always two hypothesis. These are null and alternative hypotheses.…

Q: Find a 90% confidence interval for the average time to graduation of all students

A: It is given that Sample size n = 81 Sample mean M = 4.4 Sample SD s = 0.5 The critical value of t at…

Q: the blood drive, what's the probability that the clinic will not have sufficient O-negative donors?

A: here given n = 4000 p =probability of blood type O-negative X= no of donor have blood type…

Q: MO22. Supercavitation is a propulsion technology for undersea vehicles that can greatly increase…

A:

Q: A life insurance company sells annuities to men aged exactly60. Each policyholder pays a single net…

A:

Q: Selected States Unemployment Rate Total Sales Persons/ 100,000 Population Sales/   100,000…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

Q: Event A occurs with probability 0.8. The conditional probability that event B occurs, given that A…

A:

Q: Suppose the metroparks want to survey local residents about how they feel about the park system.…

A: Given,margin of error(E)=0.0475Assume sample proportion (p^)=0.5α=1-0.95=0.05α2=0.025Z0.025=1.96…

Q: A random sample of 2000 driver's license applications found that 17% reported their eye color as…

A: We have given that,  Sample proportion (p̂) = 17% = 0.17 and sample size (n) = 2000 Then,  We will…

Q: psychologist is interested in testing whether serial killers are more introverted than the general…

A:

Q: Suppose that an allergist wishes to test the hypothesis that at least 30% of the public is allergic…

A: Given that  Suppose that an allergist wishes to test the hypothesis that at least 30% of the public…

Q: Justin started working on the sales force of ECE Calls Inc. On average, she closes the contract if…

A:

Q: What are the null and altemative hypotheses? Pno carper versus H, Ppe Caloulate the test statistic,…

A: Calculate the Sample means and sample standard deviation using Excel

Q: 3. Write the appropriate null and alternative hypothesis in symbols to determine if the proportion…

A: The null and alternative hypotheses of first example Ho:p=0.20H1:p≠0.20  Null hypothesis: THe…

Q: Figure Perfect Incorporated is a women's figure salon that specializes in weight reduction programs.…

A: There are two dependent samples which are before and after introductory program. We have to test…

Q: regression was run to determine if there is a relationship between hours of TV watched per day (x)…

A: