Solve for the sample size: 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 90% confident that his estimate is in error by no more than two percentage points?

Q: Scores 51-58 59-66 67-74 75-82 83-90 91-98 Class Mark, X 54.5 62.5 70.5 78.5 86.5 94.5 Frequency, f…

A: Given data is Scores Class Mark,X Frequency,f 51-58 54.5 3 59-66 62.5 7 67-74 70.5 15…

Q: The following data show, in convenient units, the yield Y of a chemical reaction run at various…

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Q: 1) Suppose x is a random variable best described by a uniform probability distribution with a = 30…

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Q: 5. If a = 0.1 and b=1.0, how many steps of the bisection method are needed to determine the root…

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A: The responses are given as: Here, the response "none" is defined to be "not stressful at all".

Q: Using the standard normal table in the Toolbox, determine a Z-value. Each response must include…

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Q: 45 50 51 48 48 45 43 33 56 42 46 54 39 46 40 47 Calculate the sample mean and median weights of the…

A: given data…

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A: We have given that In a standard deck of playing cards, four suits exist Each suit has 13 cards: Ace…

Q: The following are the scores of 30 college students on a statistics test. 75 80 96 65 79 71 87 69 81…

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Q: Click the icon to view the data sets. Determine the boxplot for the men's pulse rate data. Choose…

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Q: Let x denote the grams of gold obtained in a ton of ore. Consider the two events A = {x|0 ≤ x < 3)…

A: Given that Let x denote the grams of gold obtained in a ton of ore. Consider the two events  A={…

Q: A class in probability theory consists of 6 men and 4 women. An examination is given, and the…

A: Arranged of data can be done using various method. Possible number of arrangement of data with an…

Q: Café Michigan's​ manager, Gary​ Stark, suspects that demand for mocha latte coffees depends on the…

A: given data,  VALUE OF X           VALUE OF Y  2.6                          760 3.5…

Q: Done O COUNTING AND PROBABILITY Probabilities of an event and... A dartboard has 8 equally sized…

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Q: Refer to the accompanying​ table, which describes results from groups of 8 births from 8 different…

A: Given data is  No. of girls(x) P(x) 0 0.006 1 0.033 2 0.118 3 0.224 4 0.241 5 0.222…

Q: A simple random sample of 40 items resulted in a sample mean of 25. The population standard…

A: Given: Sample size = 40 Population standard deviation = 5 Confidence level = 0.95 Significance level…

Q: The Highway Patrol, using radar, checked the speeds (in mph) motorists at a checkpoint. The results…

A: 30 passing motorists at a check point 44 38 41 50 36 36 43 42 49 48 35 40 37 41 43 50 45 45 39…

Q: 5. The table shows the scores in a writing competition, ranked from highest to lowest. Score 440 400…

A: The question is about measures Given : To find : a ) Percentile rank of the score 370 b ) score is…

Q: math class consists of 25 students, 14 female and 11 male. Three students are selected at random to…

A: Given: No of female students=14 No of male student=11 Total number of students=25 Compute the…

Q: A package of 8 AA batteries contains 2 batteries that are defective. A student randomly  select four…

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Q: Wetlands Where does all the water go? According to the Environmental Protection Agency (EPA), in a…

A: Given Information: 38% of the water is outflow; 47% is seepage; 7% evaporates; 8% remains as water…

Q: 3 Find out the Evalue. t value and P value of this model.

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Q: The following are a sample of observations on incoming solar radiation at a greenhouse: 12.1 39.6…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: Below 99 Calculate standard deviation (beg summation method) from the following data: Marks No. of…

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Q: Find the standard deviation, s, of sample data summarized in the frequency distribution table below…

A: Given standard deviation formula, we should find standard deviation of the given frequency…

Q: What type of variable is a letter grade

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Q: Identify the level of measurement of the data, and explain what is wrong with the given calculation.…

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Q: The completion time of completing this test is normally distributed with mean of 65 minutes and a…

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Q: For each research project listed here, identify the var- iables and classify them in terms of level…

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

Q: Obesity as % of the adult population 20 30

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Q: F AN INDIVIDUAL. SUPPOSE THAT A RANDOM SAMPLE OF 45 MALE FIREFIGHTERS ARE TESTED AND THAT THEY HAVE…

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Q: 7) Suppose x is a random variable best described by a uniform probability distribution with a = 20…

A: 7)Given data is A random variable x~Uniform(20,40)f(x)={1b-a     ; a≤x≤b0…

Q: Table 3.1 lists the total sales (rounded to billions of dollars) of six U.S. companies for 2008.…

A: The question is about measure of central tendency Given :   To find : Mean sales of these six…

Q: Find the number of classes if the number of observation is 190.

A: From given data we have: number of observation =N=190

Q: Test the claim that the proportion of men who own cats is smaller than 20% at the .01 significance…

A: Givenclaim is that the proportion of men who own cats is smaller than 20%significance…

Q: The table below tabulates the number of T-shirts in a shop, classified according to their colours…

A: From the provided information,   Small Medium Large X-large Total Blue 10 28…

Q: Suppose that a card game uses a special deck of cards made of 50 cards, with 10 of them being each…

A: given data 5 different colours 10 cards of each colour  - one colour red   so,total 50 cards. select…

Q: 7. Which of the following forecasting method will you use? 3. What are your basis in choosing for…

A: We have data of a firm's actual market share for 12 months. The data can be visualized using a…

Q: Below 99 Calculate standard deviation (beg summation method) from the following data: Marks No. of…

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Q: In a computer game, different units are created randomly with different levels of range and…

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Q: a Light bulb manufacturer advertises that the average life for its light bulbs is 900 hours.  A…

A: The following sample data has been provided: 993 595 512 839 739 917 871 755 918 729 The sample size…

Q: In a given city it rains 25% of the days. A meteorologist has an 80% chance of getting his forecast…

A: given data  event A :sunny days  B:rainy days C: forecast is correct P(B) = 0.25    P(A) = 1-0.25 =…

Q: Use z scores to compare the given values. Based on sample data, newborn males have weights with a…

A: Given that, Based on sample data, newborn males have weights with a mean of 3282.9 g and a standard…

Q: 5) Solve for n, given P(2n²,2)=n²(48+10n) Hint: (factor)

A: Given that  given P(2n2, 2) = n2 (48 + 10n) We have to solve for n:

Q: If the joint probability density function of two continuous random variables X and Y is given by…

A: Given Information: The joint probability density function of two continuous variables X and Y is:…

Q: Basic Computation: Weighted Average Find the weighted average of a data set where 10 has a weight of…

A: Formula Used: Weighted average = ∑i=1nXiWi∑i=1nWi Where, W is the weights. X is the values

Q: If the joint probability density function of two continuous random variables X and Y is given by…

A: Joint probability density function of two continuous random variables X and Y isgiven byf(x; y) = 2,…

Q: IF n < 30 AND T = 8-1 SHOW HOW THE 100 (1 - 2a)% CONFIDENCE INTERVAL FOR μ IS DERIVED

A: Given n&lt;30,

Q: Barron's reported that the average number of weeks an individual is unemployed is 18.5 weeks. Assume…

A: Given, the population mean =  and population SD = σ = 6 Since the population is large, we assume the…