sample size of 3 is taken from
Q: random variable X is an of X is 6, determin
A: Given : The range of random variable X is {30,1,2,3,a} To find: 1).The value of a 2). The variance…
Q: Suppose that we take a random sample of size n from a population having a mean (m) and standard…
A: From the provided information, 1) Population mean (m) = 500 Population standard deviation (s) = 0.5…
Q: I need letter d. Thank you
A: The objective is to find in what ways the two sampling distributions of part (b) and (c) are similar…
Q: A population consist of 100 items. The number of different simple random samples of size 5 (without…
A: Required number = 100C5
Q: When two births are randomly selected, the sample space for genders is bb, bg, gb, and gg. Assume…
A: The given sample space is {(bb), (bg), (gb), (gg)}
Q: 43% of all statistics classes require a statistical calculator and 30% require the use of a computer…
A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…
Q: The sample data below represent the number of late and on time flights for three airlines. Flight…
A: The given sample data below represent the number of late and on time flights for three airlines:…
Q: Required: A statement of the number of engineers, employees and workers who make up this sample.
A: here given , A random sample of 30 is chosen from population of 130 professionals there are 30…
Q: If the population mean is 132, the sample mean is 136, () = 40, and N = 18, what is z?
A: Population Mean =132Sample Mean =136
Q: 02. An analyst is interested in testing whether four population have equal means. The following…
A: Hi! Thank you for the question. As per the honor code, we are allowed to answer three sub-parts at a…
Q: The number of random samples (without replacement) of size 3 that can be drawn from a population of…
A: Ans#- Find the number of random samples(without replacement) of size 3 that can be…
Q: a. b. C. d. If we have a population consists of 5 people and their wights in kilograms are: 76, 58,…
A: Hint: Population Mean Y =1N∑Yi Population Variance σ2 = 1N∑yi-Y2 Sample mean y =1n∑yi Sample…
Q: ANSWER A ONLY TY!
A: Given that Population data : 5 , 6 , 7 , 8
Q: Suppose that you draw a random sample from a population where you know the population mean is 36 and…
A:
Q: How many degrees of freedom are there in the numerator and denominator of the F test?
A: Given: n1=22S12=161.5n2=22S22=131.5
Q: Help me solve this practice question so i can better understand the concept: The assets (in…
A: Simple random sampling has two methods to draw samples from population : With replacement : When a…
Q: Two competing airlines, Alpha and Beta, fly a route between Des Moines, lowa, and Wichita, Kansas.…
A:
Q: Three randomly selected households are surveyed. The numbers of people in the households are 1, 4,…
A:
Q: 3. (SRS, Parameter, Statistic) Assume, in a classroom, there are 9 students (actually it is a…
A: Note: Hi there! Thank you for posting the question. As names are used in this question, to avoid the…
Q: If you obtained all possible random samples of size 6 as above and computed the mean from each…
A: From the above data If you obtained all possible random samples of size 6 as above and computed the…
Q: Given a population of 5 and a sample size of 3, what is the tota possible random samples that can be…
A: Given: Population size, N = 5 Sample size, n = 3 The total number of random samples that can be…
Q: From a population of 1000 items, we need to take a sample of 100 items. If we use systematic random…
A:
Q: Let say you want to test whether the population distributions of the number of goals scored (in all…
A: The solution is :The degrees of freedom are calculated by k-1 , The degrees of freedom = k - 1 So…
Q: A bank has taken a random sample of 4 customers for each set of various criteria to determine their…
A: Given: Time of day Automated Bank representative Row means Morning 6,5,8,4 x¯=5.75 8,7,9,9…
Q: The data summarized in the accompanying table is from a paper. Suppose that the data resulted from…
A: Given that We have to find a..Chi square test b..Check calculations c..Two proportion test…
Q: 3 Data was collected from 2 random samples of 50 students regarding their favorite candidate running…
A: The objective of this question is to find out the expected number of students who would favor…
Q: d) Based on the Boxplot, is it reasonable to treat this sample as if it comes from an approx. normal…
A: From the given five number summary, the boxplot is,
Q: Of the electric bills for a samle of 40 families Electric bill Number of families 2 12-16 14 4-8…
A:
Q: 2. We select n=2 random samples without substitution from the population 7, 10, 9, 11, 13, 12, 15 in…
A: It is given that , we select n = 2 random sample without substitutions from the population 7,10 , 9…
Q: Suppose that Max is a climate change scientist and butterfly enthusiast. In Max's locale, the mean…
A: The distribution is normal and the population standard deviation is unknown so the t distribution…
Q: transect is an archaeological study area that is mile wide and 1 mile long. A site in a transect is…
A: Given : Let x represent the number of sites per transect. In a section of Chaco Canyon, a large…
Q: If we have the population (A, B, C, D), make samples from this population, for samples n = 2 in…
A: From the given information,it is clear that, Sample size n=2 Population are A,B, C, D 1) we have to…
Q: Consider two independent random variables X and Y with Means of 17 for the first variable is 1 and…
A: Let the new variable be Z = 3X - 4Y The mean is given by E(Z) =3E(X) - 4E(Y) E(Z) = 3(17) -…
Q: there is no difference in population mean satisfaction depending on time of contact, there is no…
A: A bank has taken a random sample of 4 customers for each set of various criteria to determine their…
Q: Suppose we have a population with mean μ and standard deviation σ. If we take a random sample of…
A: From the provided information, We have a population with mean = μ Standard deviation = σ
Q: One sample has SS = 60 and a second sample has %3D SS = 48. %3D a. If n = 7 for both samples, find…
A: SS for one sample =60 SS for second sample =48
Q: 56% of all statistics classes require a statistical calculator and 28% require the use of a computer…
A:
Q: Determine the probabilities of each sample proportion. Sample proportion of girls ▼ ▼ Probability D…
A:
Q: A government official is in charge of allocating social programs throughout the city of Vancouver.…
A: Solution-: Let, X- Number of an annual income that is below the poverty line. Given: n = 124, X=25…
Q: Three randomly selected households are surveyed. The numbers of people in the households are 3, 5,…
A: The table for mean and variance for each sample can be constructed as:
Q: If all the possible random samples with n- 36 scores are selected from a normal population with u-…
A:
Q: The population distribution of variable X consists of five values of 2, 5, 6, 8, and 9. Calculate…
A:
Q: The records of a light bulb manufacturer show that, when the manufacturing machinery is working…
A: Given that the records of a light bulb manufacturer show that, when the manufacturing machinery is…
Q: Select one: OA ± 1.645 OB. ±1.96 OC. 3.841 OD. 2.706
A: Let be the population proportions of workers who would like to attend a self-improvement course in…
Suppose that a population consists of only 5 members and the values of are as follows.
| Member | 1 | 2 | 3 | 4 | 5 |
| Y | 5 | 3 | 5 | 2 | 2 |
a) If a sample size of 3 is taken from the population through random sampling, how many ways can we select a sample?
b) Enumerate all possible outcomes of a random sampling of size 3 (in a table). For each outcome, compute for the sample mean ( and sample variance. No need to show solution in this part
Step by step
Solved in 2 steps with 2 images
- Homser Lake, Oregon, has an Atlantic salmon catch-and-release program that has been very successful. The average fisherman's catch has been ? = 9.0 Atlantic salmon per day. Suppose that a new quota system restricting the number of fishermen has been put into effect this season. A random sample of fishermen gave the following catches per day:12 6 11 12 5 0 27 8 7 6 3 12 12 I need help with (b) and the value of the sample test statisticWhen two births are randomly selected, the sample space for genders is bb, bg. gb, and gg. Assume that those four outcomes are equally likely. Construct a table that describes the sampling distribution of the sample proportion of girls from two births. Does the mean of the sample proportions equal the proportion of girls in two births? Does the result suggest that a sample proportion an unbiased estimator of a population proportion? For the entire population, assume the probability of having a boy is the probability of having a girl is , and this is not affected by how many boys or girls have previously been born. 2 Determine the probabilities of each sample proportion. Probability Sample proportion of girls Tune intanare or cimnlifiad frartinneSuppose that Mairin has knit a collection of wool‑blend infinity scarves that she wants to sell in her Etsy shop for $28.00 each. However, she is worried that if the average price of comparable scarves is less than $28.00, hers would be less likely to sell. Mairin selected a random sample of 9 similar hand‑knit, wool‑blend infinity scarves, and their prices are as follows. $21.75,$24.00,$27.25,$29.95,$23.00,$26.00,$27.80,$33.50,$27.00$21.75,$24.00,$27.25,$29.95,$23.00,$26.00,$27.80,$33.50,$27.00 Use a left‑tailed one‑sample ?t‑test to determine whether the average price of hand‑knit, wool‑blend infinity scarves sold on Etsy is less than $28.00. Assume that the prices of all comparable scarves are normally distributed. Mairin should (reject, accept, fail to accept) her null hypothesis. There is (sufficient, no, insufficient) evidence that the mean price of hand‑knit, wool‑blend infinity scarves is (greater than, different from, less than, equal two) $28.00.
- In a two sample (independent-sample) test, what must be true if t = 0? Group of answer choices A)The two population means must be equal. B)The two sample means must be equal. C)The two sample variances must be equal. D)The two population means must be not equal.The records of a light bulb manufacturer show that, when the manufacturing machinery is working correctly, the defect rate (due to imperfections in the material used) is 1%. The manufacturer's control department periodically tests samples of the bulbs, and when 1.25% or more are defective, they call repair technicians for service. The control department is going to take a random sample of 4400 light bulbs. Let p be the proportion of defective light bulbs in the sample assuming the machinery is working correctly. A) find the mean of p b)find the standard deviation of p c)Compute an approximation for P≥p0.0125, which is the probability that, assuming the machinery is working correctly, the repair technicians will be called. Round your answer to four decimal places.Twenty different statistic students are randomly selected. For each of them,their body temperature (° F) is measured and their head circumference (in) ismeasured. Without doing any research or calculations, estimate the value of r. Forthis sample of paired data, what does r represent?
- A researcher wishes to select a stratified random sample from a population with 3 strata as follows (with the usual notation): Н Nh Sn Ch 1 300 30 25 500 40 49 3 200 20 36 If the budget is $5000 and the overheads $800, find the allocations for each stratum and estimate the variance of sample meanusing the allocation method. By using proportional allocation, estimate the variance and compare it to the variance from part (1). Determine the total cost from the allocation of part (2). Explain your result. (1) (2) (3)Help me find the sample size of a population of 500 using yamani formularA biologist wants to determine if different temperatures (15oC, 25oC, or 35oC) and amounts of sunlight (partial or full) will affect the growth of plants. He will test each combination of temperature and sunlight by randomly assigning 15 plants to each of the combinations. What type of sampling is described in this study? one sample paired data two samples more than two samples
- Suppose that we have disjoint normal populations A and B with equal but unknown population variances. Suppose we plan a sample of size 12 from from population A and a sample of size 6 from population B which we will pool to form the pooled variance. If the sample variance for the sample from population A is 25 and the sample variance for the sample from population B is 36, then what is the pooled sample variance?A transect is an archaeological study area that is mile wide and 1 mile long. A site in a transect is the location of a significant archaeological find. Let x represent the number of sites per transect. In a section of Chaco Canyon, a large number of transects showed that x has a population variance . In a different section of Chaco Canyon, a random sample of 23 transects gave a sample variance for the number of sites per transect. Use an to test the claim that the variance in the new section is greater than 36.4. What is the level of significance? 90% 1% 5% 95% 10%The single sample z test may be used to determine: a)the variability in the sample b)if a sample mean is different from a known population mean c)if two population means are different d)the variability in the population of sample means
