If we have a sample of size 9 with mean 58.43 and variance 15 from a normal population X with unknown variance, and a sample of size 13 with mean 73.64 and variance 30 from a normal population Y with unknown population variance, then, assuming X and Y are independent, what is the significance of this data as evidence that the true population variance of X is more than 20% lower than the true population variance of Y?

Q: population variance

A: null hypothesis :there is no significance difference  in medicine relieves pain in 318 seconds…

Q: Assume average grade of Physics 1 was 74 in fall 2019. We estimated the average grade of Physics 1…

A:

Q: Which statement is true? If tou rejected the null hypohesis at alpha

A: A hypothesis testing can be performed either by p-value method or the critical value method.

Q: A researcher takes sample temperatures in Fahrenheit of 16 days from San Francisco (Group 1) and 22…

A: For the given data we need to test that the mean temperature in San Francisco is less than the mean…

Q: Compute the mean, variance, and standard deviation of the GMAT scores for the 51 observations.…

A: Given Data : 345 749 427 765 336 777 663 451 787 454 711 544 453 330 718 462 585 658…

Q: A researcher takes sample temperatures in Fahrenheit of 16 days from San Francisco (Group 1) and 22…

A: For the given data we need to test that the mean temperature in San Francisco is less than the mean…

Q: Assume thAt scores on a standardized test are known to follow a bell shaped distribution with a mean…

A: L

Q: Sample 1 (n = 6) from population 1 has a mean of 42.00 and a variance of 29.00. Sample 2 (n = 8)…

A: The given summary statistics are as follows:

Q: If an analysis of variance is used for the following data, what would be the effect of changing the…

A:

Q: Show that if a one-way analysis of variance is performed on the ranks of the observations instead of…

A: Ranking the Data-  In the Kruskal-Wallis test, the original data is ranked across all groups. Each…

Q: Suppose you are interested in studying regional differences in crime rates.  You take a random…

A: Given that  Sample sizes n1=100 , n2=100 Sample mean x1 =55 , x2=50 Sample variance s12=5.78 ,…

Q: A researcher takes sample temperatures in Fahrenheit of 16 days from San Francisco (Group 1) and 22…

A: Let us consider two samples which taken randomly Here, the two samples are independent of each…

Q: Suppose that we have disjoint normal populations A and B and we want to find the standard error…

A: Denote μ1, μ2 as the true averages of populations A and B, respectively.

Q: A researcher takes sample temperatures in Fahrenheit of 16 days from Miami (Group 1) and 18 days…

A: Given data:

Q: A value of r2=.09 is considered what for the effect size test of the percentage of variance…

A: Given, r2=0.09

Q: The next seven questions refer to the following scenario: A random sample of 16 Porsche drivers…

A: From the provided information, it is obtained that: For Porsche Drivers:n1=16, x¯1=50, s12=9For…

Q: If 446 rods are sampled at random from the batch, what is the probability that the mean length of…

A: Here we have given information, A batch of steel rods produced at a steel plant have a mean length…

Q: A teacher is interested in assessing whether or not there is the same amount of variance in the…

A: Given, A sample of 15 boys had variance 460 A sample of 13 girls had variance 1400

Q: In a test of hypothesis, the null hypothesis is that the population variance is equal to 4 and the…

A: The given information for the hypothesis test is as follows:Null Hypothesis H0: The population…

Q: We are interested in comparing the average study hours for economic majors at USC and UCLA. We drew…

A: As per guidelines we will solve first question only, please repost other questions for more answers.…

Q: A researcher takes sample temperatures in Fahrenheit of 20 days from Hartford and 18 days from…

A: The claim is that the men temperature in Hartford is different than the mean temperature in Denver.…

Q: What do you conclude, using the correct statistical language! You fail to reject the null You reject…

A:

Q: A production engineer wants to determine if two assembly lines are producing the same mean number of…

A:

Q: What is your test-statistic? tTest- O 2.058 O 2.508 O 2.805 2.850

A: Given Information: Porsche Driver: Sample size n1=16 Sample mean x¯1=50 Variance s12=9 Standard…

Q: A business school has a goal that the average number of years of work experience of its MBA…

A: The random sample of size, The average number of years of work experience, The population variance,…

Q: The next seven questions refer to the following scenario: A random sample of 16 Porsche drivers…

A: For the given data df =?

Q: A teacher is interested in assessing whether or not there is the same amount of variance in the…

A: From the provided information, Sample variance of 15 boys (s12) = 460 Sample variance of 13 girls…