Following is the distribution of persons in U.K. according to difference income groups : Income No. of persons ('000£) 0-1 1-2 2-3 3-5 5-10 10-25 25- 50 50 - 100 100-1000 Calculate the average income per head. 13 90 81 117 66 27 6 2 2
Q: A type II error can only be committed if the null hypothesis is false. Otherwise, if the null hypoth...
A: The type II error is defined as accepting the null hypothesis when alternative hypothesis is true.
Q: You are given the sample mean and the population standard deviation. Use this information to constru...
A: Given Data : Sample Size, n = 72 Sample Mean, x̄ = 86.82 standard devi...
Q: significance, can it be concluded that the average age of the taxis in his company is less than the ...
A: It is given that Sample size n = 40 Sample mean M = 11.2 Population SD = 2.3 Level of significance =...
Q: Question 1: Gas expenses and mileage The Human Resources Department of a financial consultancy firm ...
A: Disclaimer : “Since you have posted a question with multiple sub-parts, we will solve first three su...
Q: Use technology to help you test the claim about the population mean, u, at the given level of signif...
A:
Q: Total 12-Month Total 12-Month Assests Sales Assests Sales Company ($ Billions) ($ Billions) Company ...
A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for you...
Q: A student was asked to find a 99% confidence interval for the population proportion of students who ...
A: We have given that the 99% confidence interval for population proportion of students from a random s...
Q: You flip a fair coin 10 times. What is the probability that it lands on heads exactly 5 times? proba...
A: From the given information we find the probability.
Q: A pair of unbiased dice is thrown. Find the probability that (i) the sum of spots is either 5 or 10,...
A:
Q: Calculate Median and Arithmetic Mean from the following series: 5 men get less than 12 men get less ...
A: Given: less than Cumulative freuqency 5000 5 10000 12 15000 22 20000 30 25000 36 300...
Q: Q2. Which diagram shows incorrect z value(s)? 0.028 0025 0.005 0.005 257 2.57 0.01 257 2.32 O A. A О...
A: The appropriate option is to be chosen based on the z-scores and considering the area below the give...
Q: Ten percent of Americans are allergic to ragweed. Suppose a random sample of 200 people is selected....
A: Given: n = 200 p = 0.10
Q: (b) Use a = 0.1 to compute the exponential smoothing values for the time series. (Round your answers...
A: Please find the answer in the excel sheet provided.
Q: Tomorrow a sum of PhP10,000 will be invested at rate R. Tomorrow's rate is unknown at the moment, so...
A:
Q: 1. A business professor studied students' performance in their comprehension test at the first year ...
A: From the provided information, Sample size (n) = 10 Level of significance (α) = 0.05
Q: In a clinical trial, 25 out of 852 patients taking a prescription drug daily complained of flulike s...
A: Given : n = 852 X = 25
Q: (a) The figure to the right represents the normal curve with u = 266 days and o = 16 days. The area ...
A: Let X denote tgh length of human pregnancies. Given that X follows N(mean = 266, SD = 16)
Q: "The weights of 1,000 children, in average, is 64kg with standard deviation of 18kg. Suppose the wei...
A: Given that n=1000, mu =64 ,s.d =18 ,p(x<59 ) =?
Q: p= proportion of motorists who check their cell phones while driving A traffic officer believes that...
A: Solution: Given that: p= 0.50 Population proportion of motorists who check their cell phones whil...
Q: Compute coefficient of quartile deviation from the following data : Marks 10 20 30 40 50 60 No. of S...
A: Given : Marks No. of students 10 4 20 7 30 15 40 8 50 7 60 2
Q: 5. The hospitalization period, in days, for patients following treatment for a serious kidney disord...
A:
Q: Because of high tuition costs at state and private universities, enrollments at community colleges h...
A: For the given data Find ( b ) b0 = ? b1 =? ( c ) forecast year 10
Q: Q 2 Given the population of men has normally distributed weights with a mean of 172 lb and a standar...
A:
Q: Suppose that f(x) = e* for x > 0. Determine the following probabilities: Round your answers to 4 dec...
A: Givenf(x)=e-x ; x>0
Q: II. For each of the following experiments you should identify the variable(s) in the study, the data...
A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for yo...
Q: A ball is drawn randomly from a jar that contains 6 red balls, 4 white balls, and 8 yellow ball. Fin...
A: We have given that the jar contains 6 red balls, 4 white balls and 8 yellow balls. The total number ...
Q: Tutorial Sheet No. ( 1 ) For the following data groups obtain : 1) Frequency distribution table. 2) ...
A: Frequency Distribution When elements of population are unequal in a certain parameter and/or measure...
Q: Sampling Distribution: fill in the blanks 1. The estimated value of parameter is called _____. 2. ...
A: The aim is to fill in the blank
Q: A facilities supervisor at a sports stadium wants to rate the condition of the seats at the stadium....
A: Convenience sampling Convenience sampling is a type of non-probability sampling that involves ...
Q: Problem Solving: Show your solution. 1. The average monthly salary of the 200 workers of a construct...
A: Please note that as per our guidelines if multiple questions are posted ew can answer only one quest...
Q: If two coins are tossed, what is the probability obtaining atleast one tail?
A:
Q: Q2) choose correct answer: 1- statistics about marriages, divorces and death is called vital bio sta...
A: We have given that the statement about to the vital biostatistics which contain the data about marri...
Q: rrom the following ultimate class frequencies of the positive and negative classes and the total num...
A:
Q: Find the correct coefficient of correlation.
A: Here use correlation coefficient formula
Q: 3. The two most common type of errors made by programmers are syntax errors and errors in logic. For...
A: "Since you have posted a question with multiple subparts, we will solve first 3 sub-parts for you. T...
Q: A company that makes cola drinks states that the mean caffeine content per 12-ounce bottle of cola i...
A:
Q: Rewrite the problem in a piece of clean bond paper and indicate the shaded area of the normal curve ...
A: From the given information we find the 73 th percentile.
Q: Example In a war between White and Red forces, there were more Red soldiers than Whites; there were ...
A:
Q: A newsgroup is interested in constructing a 95% confidence interval for the proportion of all Americ...
A: Given : x = 387 n = 510 p=xn = 387510 = 0.7588
Q: "Given a standard normal distribution with mean =114 and standard deviation = 26, find P(75 <X < 115...
A:
Q: Ten percent of Americans are allergic to ragweed. Suppose a random sample of 200 people is selected....
A: We have given that p = 10% = 0.10 n = 200
Q: Calculate Racheal's predicted value, âŷ. O Calculate Racheal's residual.
A: The regression line is given by y = 32 + 0.4x
Q: Five different paints are marketed as having same drying time. To verify the manufacturer’s claim, ...
A: Given :
Q: Find the z-scores that separate the middle 24% of the distribution from the area in the tails of the...
A:
Q: Compute coefficient of quartile deviation from the following data : Marks 10 20 30 40 50 60 No. of S...
A:
Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you bel...
A:
Q: Suppose events A, B, C, and D have probabilities as follows B Totals C 0 160 21 0.37 0.110 52 0 63 T...
A: According to guidelines we solve first three subparts when we have given multiple subparts
Q: A data set includes data from 500 random tomadoes. The display from technology available below resul...
A: From the provided information, Sample size (n) = 500 Level of significance (α) = 0.05
Q: ALPHA 0.001 Candy Company...
A: Given that, Candy Company A B C Brown 16 21 55 Yellow 139 128 247 Red 327 349 18...
Q: (c) Use a = 0.2 to compute the exponential smoothing values for the time series. Time Serles Value W...
A: Please find your answer in below images:
Step by step
Solved in 2 steps
- If each person purchases from a store has a uniform distribution at a distance of (0.2), it is likely that the sumWhat is the daily sales of the store on the day when 50 people enter the store, more than 55?Suppose that,to test the profitability of name changes in the more recent market (the past 5 years), we analyze the stock prices of a large sample of corporations shortly after they changed names, and we finds that the mean relative increase in stock price was about 0.79% with a standard deviation of 0.12%. Suppose that this mean and standard deviation apply to the population of all companies that changed named during the past five years. Complete the following statements about the distribution of relative increases in stock prices for all companies that changed names. A/ according to chebyshev's theorem, at least ? Of the relative increases in stock price lie between 0.55% and 1.03%? 36%, 56%, 75%, 84% or 89% According to chebyshev's theorem, at least 56% of the relative increases in stock price lie between ? And ? %Suppose an x-distribution has mean μ = 4. Consider two corresponding x distributions, the first based on samples of size n = 49 and the second based on samples of size n = 81. What is the value of the mean of each of the two x distributions? For n = 49, μx= For n = 81, μx=
- Suppose that the age of students at George Washington Elementary school is uniformly distributed between 6 and 11 years old. 37 randomly selected children from the school are asked their age. Round all answers to 4 decimal places where possible.Suppose that the number of accidents occuring in an industrial plant is described by a Poisson distribution with an average of 0.1 accidents per month. Find the probability that no accidents will occur in the coming month, P(X=0). (Correct to three decimal places).Assume that anxiety scores as measured by an anxiety assessment inventory arenormally distributed with μ = 20 and σ = 4. A sample of 4 patients who areundergoing treatment for anxiety is randomly selected, and their mean anxiety scoreX = 22. Is the average anxiety score from patients who are under treatmentsignificantly different from 20? Assume a = .10.
- This figure, presents the percentage deviation from the 60:40ratio in the market values of equity of Royal Dutch and Shell between September 1980 andSeptember 1995. 1. What is the main finding of this Figure?2. What is the explanation for the finding?The Normal distribution curve to the right displays the distribution of grades given to managers based on management performance at Ford. Of the large population of Ford managers, 10% were given A grades, 80% were given B grades, and 10% were given C grades. A’s were given to those who scored 380 or higher and C’s were given to those who scored 160 or lower. Suppose the company adds grades D and F so there are 5 categories to grade performance. If they want to give A’s only to those in the top 3%, what performance score must a manager exceed to get an A?area to right of 2.821 under a t-distribution with 9 degrees of freedom
- Assuming that workers' salaries in your company are uniformly distributed between $10,000 and $40,000 per year. Find the amount of money that 25% of the workers make more than that value?Suppose that historically, the proportion of people who trade in their old car to a car dealer when purchasing a new car is 48%. Over the previous 6 months, in a sample of 115 new-car buyers, 46 have traded in their old car. To determine whether the proportion of new car buyers that trade in their old car has statistically significantly decreased, what is the p-value? (please round your answer to 4 decimal places)Suppose that the blood pressure of the human inhabitants of a certain Pacific island is distributed with mean, μ = 90 mmHg and standard deviation , σ = 8 mmHg. According to Chebyshev's Theorem, at least what percentage of the islander's have blood pressure in the range from 74 mmHg to 106 mmHg ?