EXAMPLE 6.56 If λ = 2 per hour and u = 4 per hour in a 2-capacity single- server queueing system, find the effective arrival rate.

Q: ACT Scores A survey of 1000 students nationwide showed a mean ACT score of 21.4. A survey of 500…

A: given data x¯1  = 21.4σ1 = 3n1 = 1000x¯2  = 21.3σ2 = 3n2 = 500α = 0.10claim : μ1 > μ2

Q: 13. Draw the Ogives for the following data. Class interval 20-30 30-40 40-50 50-60 60-70 70-80 80-90…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: State the equations of the two regression lines. what is the angle between them?

A:

Q: Use the Standard Normal Table or technology to find the z-score that corresponds to the cumulative…

A: We have given that  P(Z< z) = 0.8365

Q: 2. According to the website Rotten Tomatoes, 94% of people who watched the Netflix show Stranger…

A: z test are used to compare the mean significance of sample and population. It also used to compare…

Q: Problem 4: Do Babies Prefer Speaking or Singing? Psychologists in Montreal and Toronto conducted a…

A: Given that: Sample mean of the differences, d¯=10.39 Sample standard deviation of the differences,…

Q: Suppose a life insurance company sells a $240,000 one-year term life insurance policy to a…

A: Given Information: A life insurance company sells a $240,000 one year term life insurance policy to…

Q: 4:35 K Determine the area under the standard normal curve that lies between (a) Z= -0.11 and Z =…

A: TO find: The area under the standard normal curve.

Q: According to a recent poll, about 40% of Americans believe in ghosts.  Assuming this percentage is…

A: As per our guidelines we are suppose to answer only three subparts kindlypost the remaining subparts…

Q: The personnel director of a large hospital is interested in determining the relationship (if any)…

A:

Q: You conducted an independent-groups experiment on two groups of laboratory rats, each containing 14…

A: GIven, You conducted an independent-group experiment on two groups of laboratory rats, each…

Q: A Loss is modeled by a uniform distribution on [1000,2500]. Calculate the semi-standard deviation of…

A: Let X be a random variable from uniform distribution. Then the formula for variance V(X) =…

Q: Please select the number of the null hypothesis and enter it in this box: Please select the number…

A: Method: Use the t-test statistic

Q: 46.The joint p.d.f of (X,Y) is given by f (x, y) = e-(x+y) 0 ≤ x, y ≤ 00 .Are X and Y are…

A:

Q: A hypothesis test procedure uses a simple random sample to determine if an unknown population mean,…

A: given data n = 34x¯ = 4.81σ = 14H0 : μ= 0HA : μ≠0

Q: Let X~ Unif(0, 2) and Y~ Bi(2, 0.5). If Z is a mixture of X and Y with equal weights, graph the…

A: Given that  X~Unif0,2Y~Bi2,0.5 fX=12-0, 0≤X≤2FX=X-02-0, 0≤X≤2       =X2,…

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

A: The data shows the overhead widths of seals and the weights.

Q: Three randomly selected households are surveyed. The numbers of people in the households are 1, 3,…

A: Given that: Nine different samples: (1,1), (1,3), (1,8), (3,1), (3,3), (3,8), (8,1), (8,3), (8,8)

Q: Number of Farms A random sample of the number of farms (in thousands) in various states follows.…

A: Given information Sample size n = 19 Population standard deviation σ = 31 Significance level(α) = 1…

Q: If var(X) = var(Y) = σ², cov(X,Y)= and 2Y-3 find the correlation between 2X+3

A:

Q: K An engineer is going to redesign an ejection seat for an airplane. The seat was designed for…

A: given data normal distributionμ = 148σ = 26.8P(140<x<181) = ?

Q: The power of a statistical test is 1 - Probability(type II error). O True O False

A: The study is about the power of a statistical test.

Q: 1424 pages with defined words the claim that there are more than 70,000 defined words is equivalent…

A:

Q: In preparing a report on the economy, we need to estimate the percentage of businesses that plan to…

A: Given that, In preparing a report on the economy,we need to estimate  the percentage of businesses…

Q: A candy factory insists that their machine produces standard 10-gram candies. However, the quality…

A: given data claim : μ≠10n = 100x¯ = 9.57s = 0.8799% confidence levelα = 1 - 0.99 = 0.01

Q: X and Y are discrete random variables. If var(X)= var(Y) = o², cov(X,Y)= find var(2X-3Y)

A:

Q: The average UQ student reports dedicating 8.5 hours per week to each 2-unit course.  What is the…

A: Given, sample size (n) = 20 sample mean (x̄) =  10 sample variance (s2)  = 9 sample standard…

Q: (d) Compute the standard deviation of the random variable X. 0x = hits (Round to three decimal…

A: Let's solve for the question numbered d, e and f as all the questions before them are answered…

Q: A population of values has a normal distribution with μ=231.3and σ=64. You intend to draw a random…

A: Given information- Population mean, µ = 231.3 Population standard deviation, σ = 64 Sample size n =…

Q: How do i get to .5594  in step 1 it makes no sense to me

A: The standard deviation of width is 0.914 and standard deviation of height is 1.634.

Q: .If X&Y are independent R.V's,what are the values of Var(X₁+X₂)and Var(X₁-X₂)

A:

Q: A marriage counselor has traditionally seen that the proportion p of all married couples for whom…

A: given data clim : p > 0.76n = 215x = 171α = 0.05p^ = xn = 171215 = 0.7953

Q: The diameter of steel rods manufactured on two different extrusion machines is being investigated.…

A: Method: If p-value is less than the level of significance (alpha) . Then we reject the null…

Q: According to a report done by S & J Power, the mean lifetime of the light bulbs it manufactures is…

A: From the provided information, Population standard deviation (σ) = 9 Sample mean (x̄) = 59 Sample…

Q: Problem 2 Suppose scores on an IQ test are normally distributed, with a mean of 100. Suppose 20…

A:

Q: mazon.com - Onl You wish to test the following claim (H) at a significance level of a = Ho: P1 = P2…

A: α=0.002n1=321p^1=0.474x1=0.474*321=152.15n2=713p^2=0.532x2=0.532*713=379.316p¯=x1+x2n1+n2=152.15+379…

Q: The breaking strengths of cables produced by a certain manufacturer have historically had a mean of…

A: Given information Sample mean x̅ = 1905 pounds Population mean µ = 1900 pounds Sample size n = 90…

Q: In a sample of 58 men, 44 said that they had less leisure time today than they had 10 years ago. In…

A: Given data: Significance level= 0.10

Q: Compute for the Pearson Product Moment Correlation Coefficient of the following data set. Interpret…

A: Since you have posted multiple questions, we will provide the solution only to the first question as…

Q: Hypertension It has been found that 26% of men 20 years and older suffer from hypertension (high…

A:

Q: xpress the confidence interval 79.8%±4.9% in interval form. Express the answer in decimal format…

A: Confidence interval are used to determine the range where the true population range lies. It has two…

Q: Refer to the following table showing a frequency distribution of quiz scores. X f 5 6 4 5 3 5 2 3 1…

A: We have given the following frequency distribution of quiz scores X f 5 6 4 5 3 5 2 3 1…

Q: With a full explanation, evaluate ℙ(−1.2 ≤ ? ≤ 0.7) where Z is a random variable with standard…

A:

Q: A recent research study reported that the mean daily internet usage among preparatory school…

A: From the provided information, Sample size (n) = 22 Sample mean (x̄) = 125 Sample standard deviation…

Q: For the standard normal distribution shown on the right, find the probability of z occurring in the…

A: Required probability is P(Z>-1.95)

Q: type are equal. k here to view the data Corn Plan

A: For Sludge Plot: sample size (n1) = 6 sample mean (x̄1) = Σx1 /n1 = 169/6 = 28.17 sample variance…

Q: large food processing company wants to pack exactly 300 grams of tuna fish in a can .It is known…

A: Each hypothesis test make conclusion based on two different approaches. They are critical value…

Q: Using the t tables, software, or a calculator, estimate the values asked for in parts (a) and (b)…

A: given data,we have to find out the critical value the given data

Q: A binary message (0 or 1) is communicated through a noisy channel with A as the message transmitted…

A:

Q: The Hungry Person restaurant has posted its sales (in thousands of dollars) for the last two years.

A: a) Excel Procedure: Enter the data for month-year and sales in Excel sheet Select the columns of…