A recent study claimed that at least 15% of junior high students are overweight. In a sample of 160 students, 18 were found to be overweight. At α = 0.01, test the claim. Interpret your results

Q: According to the above information, we are able to conduct a t-test to determine the significance of…

A: Given Information: Dependent variable=YIndependent…

Q: Given y; = Bo + B1(x; – µ) + ɛ¿ , find the OLS estimator for B1. Is this estimator unbiased? Why or…

A: Given Information:       yi=β0+β1xi-μ+εi

Q: A medical researcher says that less than 77​% of adults in a certain country think that healthy…

A: Given Inormation: Population proportion (p) = 0.77  Sample proportion (px) = 0.74  Sample size (n) =…

Q: The critical value of F for an alpha level of 0.05 and 2 and 12 degrees of freedom is 3.88. if the…

A: The observed F value is 6.67.

Q: As a researcher using ANOVA, in order to reject the null hypothesis, we need the F ratio to be:…

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Q: Suppose that an item has a hazard rate function X(t) = 2.4t², t> 0. What is the probability that (a)…

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Q: For the optimization of the likelihood function, the computation of the log-likelihood L(8; y) = log…

A: In maximum likelihood estimation we maximize the likelihood function with respect to  the parameters…

Q: A researcher conducts a hypothesis test using a sample of n = 20 with M = 34 and s 2 = 36 from an…

A: The test is conducted for samples from unknown population. The appropriate test for this scenario is…

Q: A manufacturer of automobile products has developed a new wax and is interested in comparing the new…

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Q: A veterinarian claims that the mean weight of adult German shepherd dogs is 75 pounds.  The test…

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Q: A study is made for particular allergy medication in order to determine the length of relief it…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: Why is the df value decreased by SPSS if we fail the Levene’s test?

A: Null and alternative hypothesis in order to apply Levene’s test: Levene’s test is used to test the…

Q: Provide a scenario for which you would use a related t-test and explain how we would use the…

A: we know that when we use t-test  some condition for t- test

Q: Explain how does the null hypothesis test using a t ratio.

A: The null hypothesis of a t-test will be defined based on the data given to us and can then be…

Q: A researcher is testing the effect of marijuana use on reaction time. A sample of n = 9 students is…

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Q: A survey of 40 international students who are studying a postgraduate degree in Sydney reveals that…

A: Denote p as the population proportion. If x denotes the number of cases favorable to an event in a…

Q: What is the symbol for the residual? R? None of the above / does not have a symbol

A: In the given problem, We need to write the symbol for residual.

Q: Can you please help me get the result of e^k, thank you!

A: We can solve using reciprocal relationship of exponential. e^x=1/(e^-x).

Q: A medical researcher says that less than 79​% of adults in a certain country think that healthy…

A: The random variable vaccine follows binomial distribution. The claim is less than 79​% of adults in…

Q: In a random sample of 80 Americans, 45 wished that they were rich. In a random sample of 90…

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Q: A competitive sports league expects athletes to practice 1000 hours a year, but they predict that…

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Q: Changing alpha from .05 to .10 increases the risk of a Type I error. true or flase?

A: Type I error is rejecting null hypothesis when it is true. It is also called level of significance,…

Q: A research center claims that more than 29% of employees in a certain country have changed jobs in…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: The death rate from a particular form of cancer is 20% during the treated with an experimental drug,…

A: 29. The null and alternative hypotheses are: Ho: p = 0.20Ho:p=0.20 Ha: p < 0.20Ha:p<0.20…

Q: Beyond 120 df, t and z values are identical. Therefore, some statisticians opt to use z-values when…

A: Beyond 120 df, t and z values are identical. Therefore, some statisticians opt to use z-values when…

Q: What is the approximate value of V16 - V10?

A: The approximate value of 16 -10  is  =4 x 4 - 10=4-10 9 is 3 and 16 is 4 so value of 10 is slightly…

Q: An individual is selected from a normal population with a of μ = 80 with σ= 20, and a treatment is…

A: It is given that the mean is 80 and the standard deviation is 20.

Q: Is the statement below correct? Explain. "The calculated t-value is greater than the critical…

A: Under hypothesis testing, we want to find the evidence to reject the null hypothesis.

Q: A chemical to extend the life of a car battery was invented by a researcher. If the average lifetime…

A: alternative hypothesis will be

Q: The average American consumes 9.4 liters of alcohol peryear. Does the average college student…

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Q: Find the value Saxe-aix dx

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Q: A medical researcher says that less than 77% of adults in a certain country think that healthy…

A: A. Claim: p< 0.77 The following null and alternative hypotheses need to be tested: Ho: p =…

Q: gn to encourage m I has a chance to

A: a) p(100 coins)=0.1×0.2×0.1×0.1p(100 coins)=0.0002p(80 coins)=0.2×0.2×0.3×0.3p(80 coins)=0.0036p(20…

Q: dx

A:

Q: Evaluate dx .

A:

Q: For item d, use the decision below as your reference. The null hypothesis was not rejected, and it…

A: The following information has been given: Null Hypothesis : there is no impact of organic food on…

Q: An ANOVA produces an F-ratio with df = 1, 34. Could the data have been analyzed with a t test? What…

A: The degrees of freedom for the F- ratio in an ANOVA  are defined as follows: df =k-1, n-k Here , K=…

Q: Which of following is not true about the alpha level?

A: The alpha level is the critical value or the probability to reject the null hypothesis is TRUE.  The…

Q: sample of n = 16 scores produces a t statistic of t = 2.00. If the sample is used to measure effect…

A:

Q: Is (∑i=2 Xi)/(n-1) a consistent and unbiased estimator of E(X)? Explain your result.

A: An estimator is said to be consistent if the estimates converges to the true value (that is being…

Q: A research center claims that more than 29​% of employees in a certain country have changed jobs in…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: Given the Data: Test the hypothesis that p(rho)xy is not equal to 0 at the 0.05 level of…

A: Introduction: The two variables considered are X and Y.

Q: Use ANOVA to test the hypothesis Ho: β = 0 versus H1: β = 0. What will be the value of f?   write…

A: The objective is to test the hypothesis Ho: β = 0 versus H1: β = 0 and find the value of the…

Q: The test statistic is t = 1.34, the critical value is t = 2.011. The decision would be to: Reject…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: What is the approximate value of x in the diagram below?

A: Given: ∠B=90°∠A=25°AC=18  cmBC=x  cm

Q: The accuracy of the experimental method was assessed by the results of the t-test. How would this…

A: Precision for a dataset means how closely the observations are clustered around the mean of the…

Q: What is the critical t score if you are testing a one-tailed hypothesis, α level of .05 with df =…

A: From the given information we want to find the t critical value at Alpha level of 0.05 and df = 36

Q: Fill out the table below and calculate the y statistic and degrees of freedom. Blackjack Preserve…

A: The Chi square χ2 test statistic formula is defined as below         χ2=∑Oi-EI2EI Where, Oi is the…