What is the significance OF REPLICATION?
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What is the significance OF REPLICATION?
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- A telemarketing firm has studied the effects of two factors on the response to its television advertisements. The first factor is the time of day at which the ad is run, while the second is the position of the ad within the hour. The data in the following table, which were obtained by using a completely randomized experimental design, give the number of calls placed to an 800 number following a sample broadcast of the advertisement. If we use Excel to analyze these data, we obtain the output in the table below. The Telemarketing Data and the Excel Output of a Two-Way ANOVA Position of Advertisement On the Half- Hour Late in Program On the Early in Program Time of Day Hour 10:00 42 36 62 51 morning 41 38 68 47 37 41 64 48 4:00 afternoon 62 57 88 67 60 58 60 55 85 81 60 66 nce 9:00 100 97 127 105 evening 96 103 96 101 101 107 120 126 ANOVA: Two-Factor With Replication Summary Half- Hour Hour Early Late Total Morning Count 3 146 48.67 47.92 4.33 123.72 12 3 194 64.67 9.33 Sum 120 115 40…NoneA new drug designed for treatment of hormone secretion problems is tested on laboratory rats with hormone secretion problems. The scientists are concerned that although many of the secretion problems were solved using the drug, there is an undesirable additional outcome of the weight of the laboratory rats increasing after the new drug is tested on them. A random sample of four rats that were treated with the drug was weighed before and after treatment where the weight is given in grams. Rat Before treatment After treatment 1 450 440 2 3 520 720 600 720 4 600 630 Assuming that the change in weight, (after treatment - before treatment) for the population of all rats treated with the new drug is Normally distributed with mean μ, a 95% confidence interval of μ is 25.0 39.60. O 25.0 56.09. 25.0+ 64.31. Sedang
- (4) Botany. Seeds from maize ears carry either single spikelets or paired spikelets but not both. Progeny tests on 6000 maize ears revealed the following information: Forty percent of all seeds carry single spikelets, while 60% carry paired spikelets. A seed with single spikelets will produce maize ears with single spikelets 29% of the time and paired spikelets 71% of the time. A seed with paired spikelets will produce maize ears with single spikelets 26% of the time and paired * spikelets 74% of the time. (a). with single spikelets. The genetic origin and properties of maize (modern-day corn) were investigated in Economic Find the probability that a randomly selected maize ear seed carries a paired spikelets and produces ears (b). Find the probability that a randomly selected maize ear seed produces ears with single spikelets.Approximately 1% of the US population currently have active coronavirus. According to Johns Hopkins, a particular type of COVID test (RT-PCR), has a false negative rate of 20%. That is, if a person has COVID, and takes this test, there is a 20% chance of testing negative. The false positive rate is about 1% (more recent COVID tests have a false positive rates around .4%). That means that about 1% of people who don’t have COVID will nonetheless test positive. Consider the following two-way table for 1000 randomly selected people who were tested for COVID using (RT-PCR). Positive test Negative test Total Has COVID 8 2 10 No COVID 10 980 990 Total 18 982 1000 What is the probability of choosing someone who tested positive? What is the probability of choosing someone who has COVID? What is the probability of choosing someone who Doesn’t have COVID andtested positive? What is the probability of choosing someone with COVID given that they…SPSS Output? What would the APA writeup be??? Please explain
- Which ONE of the following equations forms the basis of the One-way Anova calculations? between-groups sum of squares plus within-groups sum of squares = total sum of squares between-groups sum of squares divided by within-groups sum of squares = total sum of squares within-groups sum of squares divided by between-groups sum of squares = F-statistic between-groups sum of squares plus within-groups sum of squares = F-statistic The Anova procedure will be appropriate if certain conditions hold. One of those conditions is that the population variances should be the same. sample variances should be different from each other. population means should be the same. Below is some info about a certain One-way Anova F-test. Identify the null hypothesis, alternative hypothesis and final conclusion by choosing the BEST option for each blank. Categorical Variable: type of meat being cooked (all pieces of meat are cut into one-inch cubes)…3) Suppose you wish to perform model selection in multiple regression, but your statistical program can only fit individual multiple regression models, and does not do best subset selection, stepwise selection, or backward selection. Which of these three model selection procedures will be easiest to implement by fitting a series of individual multiple regression models? Briefly explain how you would implement one of these three model selection procedures by fitting individual multiple regression models.1. A bacteriologist is interested in the effects of two different culture media and two different times on the growth of a particular virus. She performs six replicates of a 22 design, making the runs in random order. Analyze the bacterial growth data that follow and draw appropriate conclusions. Analyze the residuals and comment on the model's adequacy. Use a = 0.05. (Two-Factor Factorial Design) Culture Medium Time 1 2 21 22 25 26 12 hr 23 28 24 25 20 26 29 27 37 39 31 34 18 hr 38 38 29 33 35 36 30 35
- The improved crop varieties are evaluated at farmers fields before their release for a large scale production. The claim made by a chickpea breeder is that, on average, her improved variety produces higher yield of chickpea compared to the local variety grown by farmers in her region. To examine her claim, the improved variety of chickpea was evaluated at 25 randomly selected farmer-fields (farms) in that region. Each field was divided into two parts, one part of the field was randomly assigned to the improved variety to be grown under a crop management practice recommended for this variety, and the other part to the local variety with an ongoing practice followed for it. You may note there were 25 different fields and the two varieties were grown within each of them. The chickpea yields of the two varieties were measured, in kg per hectare, from each of the fields. The following R- code outputs contain the information that you may use to answer the questions. The data vectors,…How do you find the mode of a particular column in stat crunch?Sickle-cell anemia is a hereditary chronic blood disease that is extremely severe when an individual carries two copies of the defective gene. It is particularly common in countries plagued by malaria, a parasiticinfection transmitted by mosquitoes. A study in Africa tested 543 children for the sickle-cell gene and also for malaria. In Group 1 which consisted of 136 children with the sickle-cell gene, 36 children had severe malariainfections. Group 2 consisted of 407 children without the sickle-cell gene, and 152 of them had severe malaria infections. Conduct a test to determine if the proportion of severe malaria infections among children withthe sickle-cell trait is different from that among children without. Test at 5% level of significance. Question: What is your p value and t statistic ?