In a given year, the average annual salary of professional South African soccer players was R189 000 with a standard deviation of R20,500. If a sample of 50 players was taken, what is the probability that the sample mean of their salaries was more than R192 000?

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A: Given that: Die A: It contains 4 red and 2 white faces. Die B: It contains 2 red and 4 white faces.…

Q: Many people feel that cereal is healthier alternative for children over glazed donuts. In a sample…

A: given data  n = 19x¯ = 10.6316s = 1.570990% ci for μ = ?

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

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A: Data given 2,3,4,6,9,10 n=6

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A:

Q: st of Ho: p=0.50, the z test statistic equals 2.47. che P-values for (i) Ha: p > 0.50, (ii) Hà:…

A: Given that  Test statistic (z)=2.47

Q: b. What is the probability that 45 or more people from this sample are concerned about the digital…

A: It is given that Proportion, p = 28% = 0.28 Sample size, n = 210

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A:

Q: In 1998, a paper by a researcher named Wakefield appear Lancet, suggesting an association between…

A: Convenience sampling is a non-probability sampling and the data collected in this method by the…

Q: In a survey, 30 people were asked how much they spent on their child's last birthday gift. The…

A: given data,n=30bell shaped distribution μ=47σ=6CI=0.80we have to find out the confidence interval…

Q: -∞0 45 -∞ 45 50 53 55 50 55 57.5 60 60 63 65 65 Data Set A 70 70 75 Data Set B 70 75 80 80 80 83 86…

A: Solution: We have to compare two data sets.

Q: Let X,Y, and Z be independent exponential random variables with an average of 1. Let W=max(Y,Z) and…

A: X, Y and Z are independent exponential random variables with an average of 1.  So, PDF of X is given…

Q: ppose that the efficacy of a certain drug is 0.55. Consider the sampling distribution (sample size…

A: given data,efficacy of a certain drug is =p=0.55sample size =n=120we have to find out the mean and…

Q: - с ← Assignment 6 ! 1 Q 60°F Sunny…

A:

Q: The distribution of grade point averages (GPAS) for medical school applicants of a certain year were…

A: given datadistribution of the data is approximetly normal μ=3.56σ=0.37top 12% of the applicant pool…

Q: (b) Sketch the region corresponding to the statement P(z > c) = 0.4. Shade: Left of a value - Left…

A: p(z>c) = 0.4 C = ?   shade the region

Q: Using the t table, determine the proper boundaries for a 95% interval (symmetric about the center)…

A: Givenconfidence level=95%Degrees of freedom(Df)=17

Q: The mean selling price (in $ thousands) of the homes was computed earlier to be $357.0, with a…

A: Given: mean = $357.0 Standard deviation = $160.7 X~normal distribution w.k.t, Z=(X-μ)/σ

Q: Assume that adults have IQ scores that are normally distributed with a mean of 101 and a standard…

A: Solution-: Given: μ=101,σ=20.3 We want to find Q1=?

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A: The data shows the percentage of woman receiving prenatal care.

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A: The data shows the lengths in hours of their work week.

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A: ANOVA summary table ,   Source  SS df MS F Between  SSB k-1 MSB =SSBk-1 MSBMSW Within  SSW…

Q: A certain flight arrives on time 85 percent of the time. suppose 145 flights are randomly selected.…

A: Givenp=0.85sample size(n)=145Let "x" be no.of flights are on…

Q: Two companies produce small motorcycles of varying quality. An important measure of quality is the…

A: Company 1 : (N1 =9) : df1 = 8 15.8,29.0,42.3,48.7,59.1,52.9,45.4,35.3,46.1  Company 2 : (N1 =6) :…

Q: 5) Use the Knaster Inheritance Procedure to help this family distribute these assets among the five…

A: Present  Matt Nathan Paul Robert Sam Estate 850  900 (Max) 800 825 800 Private Jet 700 650 750…

Q: The mean work week for engineers in a start-up company is believed to be about 59 hours. A newly…

A: The test is to check whether the mean work week for engineers in a start-up company is 59 hours or…

Q: 8. In 2004, the distribution of net worth within the United States was as given in the following…

A:

Q: Claim: The standard deviation of pulse rates of adult males is more than 10 bpm. For a random sample…

A: claim :the stanadard deviation of pulse rates of adults males is more than 10 bpm n=158s=10.9 bpmwe…

Q: Find the area of the shaded region under the standard normal distribution between the given z-…

A: Given that  Z has standard normal distribution  Find  P(-0.75 < Z < 1.19) = ?

Q: 9. The SAT subject tests in chemistry and physics for two groups of n=9 students each electing to…

A: It is given that For Chemistry, n1 = 9, sample variance = 12954 For Physics, n2 = 9, sample variance…

Q: In simple linear regression, 2 is the estimated regression equation O coefficient of correlation sum…

A: Simple regression line : relationship between one dependent variable and one or more independent…

Q: 8 Suppose the mean income of Firms in the industry for a year is 95 million dollars with a Standard…

A: given data, μ=95 millon dollars σ=5  millon dollars normal distribution probability that a randmoly…

Q: 2. For boys, the mean number of absences in the first grade is 15 with a standard deviation of 7;…

A: Given that For boys  Sample mean=15 Standard deviation =7 Sample size =100 For girls  Sample mean…

Q: 9.39 Let Y₁, Y₂,..., Y, denote a random sample from a Poisson distribution with parameter λ. Show by…

A: Given information: Y~P(λ)f(y,λ)=e-λλyy! ; y=0,1,2,.. λ≥0 Find: ∑i=1nYi is a sufficent for λ.…

Q: For a test of Ho: p = 0.50, the z test statistic equals 2.47. a. Find the P-values for (i) Ha:…

A: The P - value is the value and it obtained from the test statistic. And this p value would be used…

Q: A community health plan researcher wishes to estimate the mean number of visits per plan participant…

A: Suppose μ is the population mean number of visits per plan participant in a year.

Q: IS IT REASONABLE TO ASSUME THIS SAMPLE CAME FROM A NORMAL POPULATION?

A: we need to answer, if it is reasonable to assume the given sample came from a normal population.

Q: 6.16 More confidence interval mistakes and misunderstandings. Suppose that 100 randomly selected…

A:

Q: The standard error of the mean is the standard deviation of a theoretical sampling distribution. the…

A: We know that- Standard error of the mean is given by- SE=σn

Q: Age Male Female 20-34 11.00% 9.00% 35-44 24.00% 19.00% 45-54 39.00% 37.00% 55-64 57.00% 56.00% 65-74…

A: Age Male Female 20-34 11% 9% 35-44 24% 19% 45-54 39% 37% 55-64 57% 56% 65-74 62% 64% 75+…

Q: 21-34. What's the design? Read each brief report of statistical research, and identify a) whether it…

A: Purina Pet Institute  Diet Longevity Total dogs involved in the study = 48 Two groups are involved…

Q: Many people believe that the daily change in price of a company's stock in the stock market is a…

A:

Q: Which of the following is not an assumption of a linear regression? A The residuals follow a…

A: 1. Linear relationship:  linear relationship between the independent variable and the dependent…

Q: Consider a set of data in which the sample mean is 27 and the sample standard deviation is 6.2.…

A: GIVEN DATA SAMPLE MEAN=x¯=27SAMPLE STANDARD DEVIATION=S =6.2 X=28.5 Z SCORE =?

Q: Which of the following represents the underlying linear model for hypothesis testing?     Y = b0 +…

A: In this case, we need to identify the suitable answer for the given statement.

Q: Expected Profits from a New Business: Level of Success Hugely Popular Moderate Success Flop…

A: Expected value = x*P(x)  Data is given for Bed & breakfast , Hotel  Flop means loss (negative…

Q: In a survey, 30 people were asked how much they spent on their child's last birthday gift. The…

A: GIVEN DATA  n = 30 x¯ = 47s = 680% ci for mean.

Q: o celebrate the opening of a new store, when a customer gets to the register, they get to spin a…

A: Solution-: To celebrate the opening of a new store, when a customer gets to the register, they get…

Q: Refer to the data set of 20 randomly selected presidents given below. Treat the data as a sample and…

A: Given that            sample size, n=20 Here, we have to construct a​ 95% confidence interval…

Q: A pharmaceutical company proposes a new drug treatment for alleviating symptoms of PMS (premenstrual…

A: given data  no. of succeses (x) = 8 no. of trials (n) = 14 95% ci for p