A chi-square test for goodness of fit has df = 2. How many categories were used to classify the individuals in the sample? O cannot be determined without additional information

Q: A lobbyist is trying to estimate the true proportion of US adults that support an upcoming bill.…

A: Givenapproximation of p = 0.5Margin of error(E)=0.01confidence level = 95%

Q: . Claim: The mean IQ score of statistics professors is greater than 118. Sample data N=50, x=120,…

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Q: We have given the relative frequencies for the null hypothesis of a chi-square goodness-of-fit test…

A: The sample size is 50 and the relative frequencies are 0.65, 0.30, and 0.05.

Q: A sample of n=5 scores has a mean of M=12. What is EX for this sampl

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Q: n equal to 0.0145 a 95% confidence that pportion of children road traffic lies betwee 11.18% II pr…

A: Random Samples of 345 cases taken R output is given We have to analyze the result and have to choose…

Q: For the significance test described in #3, a SRS of 250 WCS parents were surveyed and 140 claimed to…

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Q: 5. A population of N=6 scores has EX=48 What is the population mean?

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Q: 7. A population of N = 15 scores has EX = 120. What is the population mean?

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Q: 2. What z-score is required for each situation? a) 12% to the right of the z-score?

A: Solution: Let  Z be the standard normal variable  Z~N(0,1)

Q: Suppose that a measurement has a mean μ and standard deviation o = 3. How large a sample size n is…

A: Given Standard deviations=3 E=0.1 Alpha=0.15

Q: Use the given information to find the minimum sample size required to estimate an unknown population…

A: As per our guidelines we are suppose  to answer first question.

Q: We have given the relative frequencies for the null hypothesis of a chi-square goodness-of-fit test…

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Q: For a population with σ = 12, how large a sample is necessary to have a standard error that is less…

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Q: Here sample 10 people in a high school to try to predict GPA in 10th grade from GPA in 9th grade.…

A: It is given that the SSE =5.8, sample size (n) is 10 and the regressor is GPA. Therefore, the…

Q: What would be your critical t-score? O Cannot be answered without a chosen level of significance,…

A: We have given that  Population mean = 84 Sample mean = 87 Sample size = 25

Q: • Find the two values of t such that 99% of the area under the t- distribution is centered around…

A: We want to find t-value

Q: For a population with σ = 12, how large a sample is necessary to have a standard error that is less…

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Q: Assume that a population of thousands of people whose responses were used to develop the anxiety…

A: Note: Thank you for the question. Since multiple subparts are posted, according to our policy, we…

Q: At the 0.05 level of significance, is there enough evidence to reject Ho and support the claim of…

A: Test is that whether a new Javelin model will help increase the throw length.

Q: Consider the Sample mean, Xn. as an estimator of population mean, l. The Cenfal Lmit Theorem tells…

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Q: A sample of n = 4 scores has a standard error of 10 points. For the same population, what is the…

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Q: a simple random sample of earthquake depths yields the following: n=600, x̄=5.82 km, and s=4.93…

A: For the given data Perform t test for one mean

Q: For a population with o= 15, how large a sample would be needed to have a standard error of 3 points…

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Q: A local restaurant claims that it gets 45 percent of its customers from Monday through Thursday, 20…

A: Given Information:  A local restaurant claims that it gets 45 percent of its customers from Monday…

Q: For a population with o = 24, how large a sample is necessary to have a standard error that is: %3D

A: Given that  Population with standard deviation (σ) = 24   We know that  Standard error (SE) = σn

Q: A sample of n = 100 people is classified into four categories. If the results are evaluated with a…

A: We know that Degree of freedom =No. of class -No. of condition. Since there will be only one…

Q: A treatment is administered to a sample of n=9 selected from a population with a population =80 and…

A: The sample size n is 9.

Q: We have given the relative frequencies for the null hypothesis of a chi-square goodness-of-fit test…

A:

Q: In a random sample of n = 600 drivers, 108 individuals say that they never wear a seatbelt when…

A: We have given that,  For part a and b ,  Favorable cases (X) = 106 and sample size (n) = 106 Then,…

Q: t to determine whether or not the mean of the population from whic ate the null and the alternative…

A: The given data is x 24 48 31 57

Q: For a population with o = 24, how large a sample is necessary to have a standard error that is: %3D…

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Q: A sample of birth weights of 48 girls was taken. Below are the results (in g):

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Q: f. A random sample of n= 80 observations from a quantitative population produced I = 30.2 and s? =…

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Q: A sample of n=25 scores is obtained from a population with u=70 and o=25. If the sample mean is…

A: Z-score: The z-score value is a numerical measurement that describes a value of the relationship to…

Q: What is the margin of error for 95% confidence for a sample of size 700 where p = 0.65? A. 0.0455…

A: to find  the margin of error for 95% confidence sample size n =700 p = 0.65

Q: For a population with o = 12, how large a sample is necessary to have a standard error that is less…

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Q: The distribution of life spans is approximately normal and u=40, how large a sample is required in…

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Q: For a sample with s = 9, a score of X = 67 corresponds to z = +1.00. What is the sample mean?

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Q: The toll plaza on Route 1 in Dover has four tollbooths open to all vehicles. Ms. Timlin conducted a…

A: We know if P-value is less than significance level α then we reject null hypothesis at given…

Q: For a population with o = 12, how large a sample is necessary to have a standard error that is less…

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Q: If aipha is . what is the critical value of Z ina2-taled test? +2.57

A: Answer - If alpha is 1% , what is the critical value of z in a two tailed test ?

Q: A sample obtained from a population with σ = 48 has a standard error of σM = 6. How many scores are…

A: Given that, Standard deviation = 48 Standard error = 6

Q: A marketing researcher would like to compare the mean amounts that men and women spend on Christmas…

A: Null and alternative hypotheses: Null hypothesis: Null hypothesis is a statement which is tested for…

Q: A sample of 100 yielded a test statistic of 2.1. For a level of significance of 0.05, the null…

A: From the provided information, Sample size (n) = 100 Test statistic (z) = 2.1 Level of significance…

Q: In a random sample of n = 600 drivers, 168 individuals say that they never wear a seatbelt when…

A: Givenn=600x=168

Q: A sample of n = 8 scores has a mean of M = 16. For this sample, EX= 128. O True O False

A: According to the given information, we have Sample size, n = 8 Mean = 16

Q: For a particular population, a sample of n = 4 scores has a standard error of 6. For the same…

A: For a population, sample size is 4 and standard error is 6.