a. How many treatments were used in the experiment?
Q: When the sample size is 15 and you are doing a t test, the number of degrees of freedom is 15. True…
A: Given that Sample size n =15 Degree of freedom =df =n-1
Q: The symbol u, represents the mean of a sample of size n. True False
A:
Q: 200 1) If X~N(4,1), when sample size = 200, P(EX; > 600) = ?
A:
Q: How many degrees of freedom are in a repeated measures study with n=20 participants?
A: Degrees of freedom (DF) state that the number of independent values that can vary in an analysis…
Q: For an experiment with 3 groups of 10 participants in each group. dfW = 27 10 30 33 QUESTION 8
A:
Q: If we have a statistical community with only six vocabulary, and you need to choose a sample of only…
A: Given that, in a statistical community there are six vocabulary and we need to choose three sample…
Q: n. How large of a sample size is required?
A: here MOE = 0.03 p =0.28 z critical for 95% confidence level = 1.96 s
Q: The larger the sample size, the smaller the standard error. True or Fale?
A: Given that, The larger the sample size, the smaller the standard error.
Q: For a repeated-measures study comparing three treatment conditions with a sample of n = 4…
A: It is given that the participant totals are 3, 6, 9 and 6.
Q: Find the required sample size, n, if c=0.89, E=0.05, and is unknown.
A: Solution: Given, c=0.89 E=0.05 Proportion is unknown. The critical value for zα/2 =1.598 using Excel…
Q: Can you think of an area where it might not be practical, for a variety of reasons, to sample 100%…
A: Given:- We can think of an area where it might be practical, for a variety of reasons ,to sample…
Q: In an experiment, if persons are assigned randomly to experimental and control groups, then the…
A: There are two samples, one is for experimental groups and the other is for control groups. It is…
Q: We need first to determine the degrees of freedom before we could calculate the sample mean True…
A: The sample mean is defined as Mean = Sum of sample observations/Sample size
Q: If one sample has n = 4 and SS = 90 and a second sample has n = 8 and SS = 150, then the estimated…
A:
Q: How many main effects are in a 3 x 3 factorial design ANOVA? O 2 3 0 9
A:
Q: d) If your random sample actually produced a mean of 723,500 php, would you consider this as…
A: Here use rule for finding unusual range That is values those are above 2 standard deviation from…
Q: The information we gather with experiments and with surveys is collectively called…
A: here use definition of data
Q: S. The effectiveness of a flu vaccine is tested by treating one group of subjects with the vaccine…
A: Here use 2 proportion z test
Q: Holding everything else constant, what would happen if the sample size had been greater?
A: Goofy Marketing Solutions conducted a survey among 16 randomly selected visitors to the newly opened…
Q: For the exam scores. Class MT1 MT2 Sample size, n 14 13 Mean scores 75.3 826
A: Statistics Lecturer is testing the mean score for 3 classes Class MT1 MT2 MT3…
Q: The Quality Control Department employs five technicians during the day shift. Listed below is the…
A: Given data :
Q: Two samples are randomly selected from
A: Failing to reject the Null hypothesis means accepting it and rejecting the alternative hypothesis.
Q: Complete the ANOVA table. A) B) C) D)
A: A) The degrees of freedom for SSb is 2 and the sum of squares for SSb is 634.11.
Q: If a researcher reported for a single-sample t-test that t(17) = 2.90, p<.02, how many subjects…
A: It is given that the test is single-sample t test and the degrees of freedom is 17.
Q: Given 3 samples: n =20,x, =15,s, =3; n, =20,x, =12, s, =4; %3D nz = 20, x, =18, s, = 5. Use ANOVA to…
A: Given, This is ANOVA test for a single factor Null and alternative hypothesis: Ho: µ1 = µ2 = µ3…
Q: nswer: __________ 3. N = 12 Answer: ___
A: As per the bartleby guidelines for more than three parts only three has to be solved .Please upload…
Q: What is the sample space for an experiment?
A: An experiment is an activity which has observable values. The results obtained from the experiment…
Q: 1. what is the sample size of the body?
A: The association exist between the two categorical variable are calculated using chi square test. The…
Q: The newspaper in the previous problem decides to increase the size of its random sample of citizens…
A: Given Data: Previous sample size=250 New sample size=500
Q: Find the estimated standard error for the sample mean for n = 8 and SS= 5042.
A: Given n=8, SS=5042
Q: (a) What proportion of states** have cases that are going down? (b) What proportion of states** have…
A: Hint: Calculate the number of states in all groups then divide them by the total number of states to…
Q: A researcher reports t(22) = 5.30, p < .01 for an independent measures experiment. how many…
A: Given information researcher reports t(22) = 5.30, p < .01 Degrees of freedom is given by d.o.f =…
Q: 1. What percentage of scores fell within ±1 SD for ZADHD?
A: By using Empirical rule, we can know that what percentage of data fall with in the number of…
Q: a. For samples of size sixty, what is the distribution of the sample mean? b. Is the answer to part…
A: here given random variable X is from population with mean 30 and standard deviation 5 here use…
Q: calculate the mean and ss for each of the following sample numbers 1,3,4,0
A:
Q: when you have means from two different samples, it is best to conduct a what test?
A: When there is mean from two different samples, two types of test can be conduced:
Q: 4. The fuel economy sticker on a new SUV's window sticker indicates the owner can expect 16 mpg in…
A: From the given information, Sample size n =50 Using Excel function, “=AVERAGE(A1:A50)”, the Sample…
Q: Given: σ = 0.9, δ = 3.25 − 3, α = 0.05 , Zα/2 = z0.025 What sample size would be required to…
A: δ = 3.25 − 3 Effect Size = (3.25 − 3) / 0.9 = 0.277
Q: (c) If we want a margin of error of only + 1.0, what sample size is needed? Round your answer up to…
A: The following information is provided. consider the level of significance is 0.05. Also,
Q: 17. How many observations are there?
A:
Q: The results of the total test scores of 60 test takers as new employees of hardware companies are as…
A: Solution-: We find the given data is population or sample?
Q: Es was selected from a process s), along with the sample rang Process Data
A: From the given information,
Q: Given a population of 5000 scores with mean µ = 86 and o= 10. How many scores 3. above 116?
A:
Q: QUESTION 15 A 4X5 ANOVA would have how many cells?
A: The available information is: In a 4 × 5 ANOVA table The 4 represent the treatments. The 5 represent…
Q: How many blocks were used in this experiment?
A: Given that number of levels k = 5 We have to find number of blocks b
Q: Without replacement, the different samples of size 2 are: * а. 4 b. 5 O c. 6 O O
A: In the method of simple random sampling without replacement, elements are selected at random but…
Q: In a designed experiment,a. what are the experimental units?b. if the experimental units are humans,…
A: a)Experimental units:In a designed experiment, the experimental units are defined as the items or…
Q: SAMPLING Source Saunders er al (2009)
A: Since, the question number is not specified for answering, we'll be answering the first question…
Q: Take a guess concerning the population proportion of orange candies. Is this the same as the…
A: For the first student there are 17 orange, 7yellow and 7 brown candies which makes total of 31…
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- How many samples should be selected when the total population is 31 for goldfeld and quandt test to find the heteroscasticity??An LED light bulb manufacturer claims that the average lifespan of its 60-watt LED light bulbs is 43,000 hours.A corporate watchdog group is suspicious of the company's claim and thinks that the true average lifespan of the 60-watt LED light bulbs produced by the company may be less than the advertised 43,000 hours. The group collected and tested a random sample of 240 light bulbs and found the average lifespan of the sample was 42,958 hours.Use the p-value method to test the hypothesis that the mean lifespan of this brand of 60-watt LED light bulb is less than 43,000 hours, using α=0.025α=0.025. Assume the standard deviation of the lifespan of all such light bulbs is known to be 430 hours.State the null and alternative hypothesis for this test.H0:H0: H1:H1: Determine if this test is left-tailed, right-tailed, or two-tailed. right-tailed two-tailed left-tailed Should the standard normal (zz) distribution or Student's (tt) distribution be used for this…A researcher uses an ANOVA to compare three treatment conditions with a sample of n = 8 in each treatment. For this analysis, find dftotal, dfbetween, and dfwithin.
- a) The plant manager of a company that makes pillows claims that only 8 percent of thepillows made have a stitching defect. The quality control director thought that thepercent might be different from 8 percent and selected a random sample of pillows totest.A virologist is interested in studying the effects of 2 preselected different culture media and 2 preselected different times on the growth of a particular virus. She performs a balanced design with 6 plates for each of the treatment combinations. The 24 measurements were taken in a completely randomized order.A manufacturer suspects a difference in the quality of the sparenarts he receives from two suppliers. He obtains the followingdata on the service life of random samples of parts from twosuypliers.StandardSupplierNumber in SampleMeansDeviation5015010100153Test whether the difference between the two sample means isstatisically significant at the 1% level of significance.
- A trucking firm is considering the installation of a new, low-restriction engine air filter for its long-haul trucks, but doesn’t want to make the switch unless the new filter can be shown to improve the fuel economy of these vehicles. A test is set up in which each of 10 trucks makes the same run twice once with the old filtration system and once with the new version. Given the sample results shown below, use the 0.05 level of significance in determining whether the new filtration system could be superior. Truck Number Current Filter (mpg) New Filter (mpg) 1 7.6 7.3 2 4.1 7.2 3 10.4 6.8 4 6.9 10.6 5 5.6 8.8 6 7.9 8.7 7 5.4 5.7 8 5.7 8.7 9 5.5 8.9 10 5.3 7.1 Do reject or fail to reject H0?A random sample of 1100 potential voters was randomly divided into 2 groups. Group 1: 500 potential voters; no registration reminders sent; 248 registered to vote Group 2: 600 potential voters; registration reminders sent; 332 registered to vote Do these data support the claim that the proportion of voters who registered was greater in the group that received reminders than in the group that did not? Use a 1% level of significance.A manufacturer is developing a nickel-metal hydride battery to be used in cellular telephones instead of a nickel-cadmium battery. The director of quality control decides to evaluate the newly developed battery by picking a random sample of employees with cellular phones and asking them to use both phones until the batteries run down. The results are given in the excel data file. At the 5% level of significance is there evidence that the new battery provides more minutes of talk time per battery charge? Show your work and give your answer in complete sentences in context of the problem. Data Table: Person Old Battery Type New Battery Type 1 72.39 89.95 2 75.25 64.60 3 82.10 71.25 4 58.98 87.07 5 67.07 103.11 6 35.98 76.46 7 75.37 83.92 8 66.00 83.42 9 73.14 84.30 10 67.14 92.48 11 83.06 93.48 12 57.00 59.11 13 65.92 92.27 14 76.12 61.81 15 85.21 72.83 16 80.73 42.17 17 60.65 83.89 18 36.63 94.41 19 77.98 70.30 20 75.40 77.72 21 84.70 84.35…
- A random sample of n1 = 300 voters registered in the state of California showed that 143 voted in the last general election. A random sample of n2 = 216 registered voters in the state of Colorado showed that 130 voted in the most recent general election. Do these data indicate that the population proportion of voter turnout in Colorado is higher than that in California? Use a 5% level of significance.Tardigrades, or water bears, are a type of micro-animal famous for their resilience. In examining the effects of radiation on organisms, an expert claimed that the amount of gamma radiation needed to sterilize a colony of tardigrades no longer has a mean of 900 Gy (grays). (For comparison, humans cannot withstand more than 10 Gy .) A study was conducted on a sample of 27 randomly selected tardigrade colonies, finding that the amount of gamma radiation needed to sterilize a colony had a sample mean of 907 Gy , with a sample standard deviation of 17 Gy . Assume that the population of amounts of gamma radiation needed to sterilize a colony of tardigrades is approximately normally distributed. Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the 0.05 level of significance, to support the claim that μ , the mean amount of gamma radiation needed to sterilize a colony of tardigrades, is not equal to 900…Tardigrades, or water bears, are a type of micro-animal famous for their resilience. In examining the effects of radiation on organisms, an expert claimed that the amount of gamma radiation needed to sterilize a colony of tardigrades no longer has a mean of 900 Gy (grays). (For comparison, humans cannot withstand more than 10 Gy .) A study was conducted on a sample of 27 randomly selected tardigrade colonies, finding that the amount of gamma radiation needed to sterilize a colony had a sample mean of 907 Gy , with a sample standard deviation of 17 Gy . Assume that the population of amounts of gamma radiation needed to sterilize a colony of tardigrades is approximately normally distributed. Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the 0.05 level of significance, to support the claim that μ , the mean amount of gamma radiation needed to sterilize a colony of tardigrades, is not equal to 900…
