Imagine that your null hypothesis is σ2 = 10 and your alternative hypothesis is σ2 > 10. What is the critical value for the test statistic  given α = 0.05 and n = 12?

Q: What is the critical value for a one sided t-test with an alpha = .1, and degrees of freedom = 12?

A: Solution: From the given information, α=0.1 and degrees of freedom is 12. The critical value can be…

Q: What can be concluded at the αα = 0.05 level of significance?

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Q: A sample of n=22 data values randomly collected from a normally distributed population has variance…

A: Solution-: Given: σ02=9.9,n=22,s2=17.9 Hypothesis: H0:σ2=σ02=9.9 Vs H1:σ2>9.9  (Right tailed…

Q: Only 18% of registered voters voted in the last election. Will voter participation decline for the…

A: 1) For this study, we should use z-test for a population proportion  2) Hypothesis: H0: p=0.18 H1: p…

Q: Random samples of 250 male and 170 female at a certain barangay were asked whether they favor…

A: Given Information: Let 1 be the subscript of males and 2 be the subscript of females  n1 = 250  n2 =…

Q: A sample of n=25 individuals is randomly selected from a population with a mean of p=65, and a…

A: Given that   x̄ =70 ,  μ = 65  , s = 20 , n =25   Test statistic ( t  )  t = ( x̄ -  μ  )/(s/√(n)

Q: Suppose X is a random variable with normal distribution and Var(X)=100. Suppose we have a sample of…

A: The confidence level is 0.90.

Q: Elisabeth conducted an experiment where she examined the number of tourists who visited one place in…

A: Solution: From the given information, a 95% confidence interval for the difference between the two…

Q: A sample of n = 4 scores is selected from a population with μ = 40 with σ = 8, and the sample mean…

A: The Expected value for the sample mean is 40 and it is obtained below:

Q: Only 10% of registered voters voted in the last election. Will voter participation increase for the…

A: (1)   Determine the type of study used.   The type of study used is in the given problem is “Z-test…

Q: Only 18% of registered voters voted in the last election. Will voter participation decline for the…

A: The study is about voter participation decline for the upcoming election indicating that the…

Q: A sample of n=34 data values randomly collected from a normally distributed population has variance…

A:

Q: Suppose that we have a problem for which the null and alternative hypothesis are given by: H0: μ =…

A:

Q: According to shopper data, 97% of households purchase toilet paper. An analyst believes this is too…

A: The power of a hypothesis test is the probability of correctly rejecting a False Null Hypothesis.…

Q: A sample of n=24 is selected from a population = 120 and σ = 40.  If the sample mean is 130, what is…

A: It is given that the population mean, μ=120 and standard deviation, σ=40. For the sample size of 24,…

Q: sample of n=50 data values randomly collected from a normally distributed population has standard…

A:

Q: A sample of n=25 individuals is randomly selected from a population with a mean of u=65, and a…

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

Q: A study found that in 2005 12.5% of US workers belonged to unions. Suppose a sample of 500 US…

A:

Q: Twenty-four mice are inoculated with three strains of typhoid. The number of days until death for…

A: The information provided in the question are as follows :- Sample size (n) = 24 Types of typhoid…

Q: t-test would you conduct in this scenario? Conduct a hypothesis test to evaluate the significance of…

A: Given, sample size(n) = 16 population mean  µ = 30 sample mean (M) = 33 sample variance ,s2 = 64

Q: What is the P-value?

A: Given: Sample size =160  x = 5 smoked 21 or more cigarettes during pregnancy α=0.1 level of…

Q: What is tα/2,df for a 95% confidence interval of the population mean based on a sample of 15…

A: Solution: We have to find the t-critical value (tα/2) at the given significance level 1- 0.95=0.05…

Q: A sample of n = 10 scores has a mean of M = 3. What is ΣX for this sample?

A: Solution: From the given information, M=3 and n=10.

Q: Only 16% of registered voters voted in the last election. Will voter participation increase for the…

A:

Q: If, in a sample of n=30 selected from a normal​ population, X=58 and S=12​, what is your statistical…

A: Given : Sample Size (n) = 30 Sample Mean (X¯) = 58 Sample SD (S) = 12 Significance Level (α) = 0.05…

Q: You are conducting a study to see if the probability of a true negative on a test for a certain…

A: Solution: State the hypotheses Null hypothesis: H0: p=0.11 That is, the probability of a true…

Q: Only 14% of registered voters voted in the last election. Will voter participation increase for the…

A:

Q: 54% of students entering four-year colleges receive a degree within six years. Is this percent…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: 10% of all college students volunteer their time. Is the percentage of college students who are…

A:

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

A:

Q: A random sample of 16 observations from a normal population. The sample  standard deviation = 5 and…

A: Solution : Given that sample size n=16  sample standard deviation s=5 and  sample mean x¯=100 claim…

Q: A local restaurant claims that the waiting time for its patrons to be served is the lowest in the…

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Q: We wish to give a 90% confidence interval for u.  Here,  u denotes the mean value of a normally…

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Q: A sample of n = 25 individuals is selected from a population with µ = 20. After a treatment is…

A: Given that Sample size(n) =25 Population mean (µ) =20 Sample mean (x̄)=22 Sample Variance (s2)=125…

Q: Suppose X is a random variable with normal distribution and Var(X)=100. Suppose we have a sample of…

A: The confidence level is 0.90.

Q: The test statistic of z = 2.05 is obtained when testing the claim that p > 0.4. Identify the…

A: The test statistic is z=2.05 The claim is p > 0.4 α=0.10

Q: Suppose we have a random sample of size n=100 drawn from a population with a mean of μ=50 and a…

A: The test statistic is calculated as (x̄-μ0)/(σ/√n), where x̄ is the sample mean, μ0 is the…

Q: According to shopper data, 97% of households purchase toilet paper. An analyst believes this is too…

A: *Type I error is denoted with α level     i.e., α level  = level of significance    *Power of the…

Q: A sample of n=25 data values randomly collected from a normally distributed population has variance…

A: