A shop owner claims that on average, his shop has a daily turnover of R75 000. Test this claim at the 5% significance level, if the average daily turnover for a sample of 88 days was R71 500. Assume a population standard deviation of R4 450.

Q: Ten competitors in a beauty contest are ranked by three judges in the following order: 8. 10 3 4 9.…

A:

Q: EXCERSISE Suppose that X1,.., X, form a random sample from a uniform distribution on the interval…

A: please see below

Q: Q3) The following data represents the relation between the heat capacity of a plate (q) and time…

A: When we want to predict the value of one variable, say y, from the given value of another variable,…

Q: hours. Is there a significant difference between the average life of all of the manufacturer's…

A: here from given information  sample mean  =  24.3  sample size  = n = 35  population standard…

Q: 5. A philanthropic organization helped a town in Africa dig several wells to gain access to clean…

A:

Q: 10. Find mean deviation and its coefficient using by A.M. and Median. Values 31, 46, 47, 48, 52, 58,…

A:

Q: isn't the sample size should be 35, not 12?

A: We have given that the information presented by the tutorial school related to the IELTS  mock…

Q: In a random sample of 250 students who enrolled in Science, 150 took notes during classes. Find an…

A: Given that n=250,x =150,alpha =0.05 Find an approximate 95% confidence interval for the population…

Q: Compute for 4+ 3X {(-2,-1,0} (X)+ X²I{1,2,3}(X)

A:

Q: Hundreds of thousands of people infected  Number of countries [1.0;3.0) 5 [3.0;5.0) 8 [5.0;7.0) 17…

A:

Q: Find the point estimate of the population parameter  and the standard deviation for each of the…

A:

Q: Example 4 friends each choose a random number between 1 and 5. What is chance that any of them chose…

A: 4 friends each choose a random number between 1 and 5. We need to find the chance that any of them…

Q: A coach uses a new technique in training middle distance runners. The times for 8 different athletes…

A: Solution:- From given information claim:-The training helps to improve the athletes' times for the…

Q: No. of Hours Playing Reduction Of Academic Online Games (x) Performance (y) 3 4 6. 6. 7 8. 8 10 8 12…

A: The r=0.9466, a Very strong positive correlation. Hence, option c is the correct answer.

Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…

A:

Q: 4. Interval estimation of a population mean, population standard deviation known The 2008 Workplace…

A:

Q: What is the probability that the investment has a return of at least 20%？ What is the probability…

A: here AS PER GUIDELINES I HAVE CALCULATED FIRST MAIN QUESTION KINDLY REPOST FOR REMAINING  here given…

Q: Historically (from about 2001 to 2005), about 58% of Americans believed that Earth’s temperature was…

A:

Q: A study is conducted between high school students and college students to compare their proficiency…

A:

Q: Find the mean, median, mode and range of this data set: 19, 18, 21, 16, 15, 17, 20, 18.

A: Solution

Q: There are four entrances to the Government Center Building in downtown Philadelphia. The building…

A: For the given data Perform Chi square goodness of fit

Q: A certain chemical pollutant in the Pasig River has been constant for several years with mean u = 34…

A:

Q: Q12: Let X,'s be i.i.d. random variables. Consider the random power series n=0 Is there any…

A:

Q: 6.26 Use Theorem 6.6.5 to establish that, given a sample X1,.. ., Xn, thé are minimal sufficient.…

A: Given that -

Q: Use the given degree of confidence and sample data to construct a confidence interval for the…

A:

Q: Note: Determine first the critical value using the confidence level, a, and/or df (for t-test) 1. =…

A: (1) Given: zComputed=1.11Confidence level=90% (One tailed)

Q: Athletes at a certain university have a long term graduation rate of 0.60 or 60%.  Researchers…

A: here given,  Athletes at a certain university have a long term graduation rate of 0.60 or 60%.…

Q: Find the average p ower of the wsS random process X(t) which has the power spectral density o? -17…

A:

Q: Is there enough evidence at =α0.01 to support his claim? Assume that the variable is normally…

A: We have given that  Sample mean = 6.4 Population mean = 7 Population standard deviation = 1.6 Sample…

Q: Decision: 3.25 Zcritical = 1.28 5. Zcomputed Decision: %3D %3D

A: According to the given information in this question We need to identify the correct decision

Q: Another scale that the parents completed for their children was the Spence Social Skills…

A:

Q: An important issue in conservation biology is how dispersal among populations influences the…

A:

Q: Example 3-17. A survey of 370 students from Commerce Faculty amd 130 students from Science Fatulty…

A:

Q: What is the variance of the following data( 1, 2, 3, 4, and 5)?

A: According to the given information in this question We need to calculate the value of variance

Q: 6.26 Use Theorem 6.6.5 to establish that, given a sample X1,..., Xn, the following statistics are…

A: Given that -

Q: Draw a type B- OC curve for this sampling plan. (graph sheet Q5: Suppose Sony corporation ships…

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

Q: 5. On the average, basketball players drink 2.3 liters of water with a standard deviation of 0.9…

A: here use basic of sampling Distribution

Q: ndom sample of 17 registered nurses in a large hospital showed that they worked on average 43.7…

A: It is given that We have a random sample of size, n = 17 sample mean, x̄ = 43.7 sample standard…

Q: 3. A survey on the drinking habits of Filipinos estimated the percentage of adults who drink beer…

A: Givensample size(n)=1516No. of adults said drank(x)=985p^=xn=9851516≅0.6497confidence interval = 95%

Q: (e) Consider the model Y; = Bo + B,X; +u; where E (u;|X;) = 0, observations (Yi, X;) are independent…

A: Given that, the model           Yi=β0+β1Xi+ui where Eui|Xi=0, observationsYi,Xi are independent and…

Q: estimate a population mean μμ. Find the margin of error M.E. that corresponds to a sample of size 9…

A:

Q: The amount of pollutants that are found in waterways near large cities is normally distributed with…

A: Let X denote the amount of pollutants that are found in waterways near large cities is normally…

Q: Ha: µ > 50. Should Ho be rejected at 0.05 level of significance? Ha: µ < 50. Should Ho be rejected…

A:

Q: a. ) Find the class mark, range with 7 as the classes. Arrange the classes in decreasing order. b. )…

A: a. To construct a grouped frequency distribution table, the number of classes = 7 Class…

Q: Each prize winners will be randomly selected from 25 people attending a party. There will be 1st,…

A: here given there are total 25 people and total 8 prize are there  here use counting Principle

Q: 6.11 Show that r in (6.16) is the square of the correlation E (x; - )(y; -y)

A: From the given information, y x Y-Y¯2 X-X¯2 X-X¯Y-Y¯ 78 4.4 47.16805 0.875722 6.426981 74…

Q: The data in photo attached show the number of births per 1000 population in samples taken…

A: Considering the African countries, we need to test the hypothesis that the standard deviation of the…

Q: give a situation (real life situation) that best explain the given

A: Accuracy of an estimator refers to the closeness of a measure from the true value of the parameter.…

Q: 1. What is the probability that out 393 confirmed cases 198 has recovered? c. 50.4 % d. all of these…

A: 1. What is the probability that out 393 confirmed cases 198 has recovered?d. all of theseindividuals…

Q: Suppose that the population of the scores of all high school seniors who took the SAT Math (SAT-M)…

A: From the above data The correct option is.  C) 99%