9. 32 students from Batangas National High school shows a mean IQ of 111 while 30 students from Batangas State University Integrated School were found to have a mean IQ of 115. Variance is equal to 64 and 78, respectively. Is there a significant difference between their IQ's? Use a 0.025 level of significance.

Q: tenured bus inspector claims that the difference between the variance of speeds of all city buses…

A:

Q: If the sample size is 30 for each group, there are 3 groups, and the mean score for football players…

A: Given data SSbetween = 60SSwithin = 105dfbetween = 3 dfwithin = 60α = 0.05Critical value of F is…

Q: When conducting a One-Way Analysis of variance, what option on the LSMEANS statement requests a…

A: Given information: The researcher is specially interested in conduction One-Way ANOVA.

Q: a. Which if these estimators are unbiased for 6? b. Among the unbiased estimators, which has the…

A:

Q: An insurance company crashed four cars in succession at 5 miles per hour. The cost of repair for…

A: Range: For a set of observations, range is defined as the difference between the maximum and the…

Q: 900

A: It is observed that the mean of simple sample that is for null hypothesis μH0 is 3.23 c.m.…

Q: A recruitment specialist wishes to examine whether there is any difference between the variation in…

A: Accounts are taken as group 1. Marketers are taken as group 2. Given:…

Q: When the 583 female workers in the 2012 GSS were asked how many hours they worked in the previous…

A: Given data are appropriate for testing of hypothesis to test, z-test for single mean. Because it is…

Q: If the variance of the Electrical Engineering board examination result is 36, what is the minimum…

A:

Q: Why would we run a two-way analysis of variance and what effects would we look at for interpretation…

A: We have to tell about TWO - WAY ANOVA (Two way analysis of variance)

Q: A relatively new breed of cat that first appeared in China frequently suffers from joint problems.…

A:

Q: Steve believes that his wife’s cell phone battery does not last as long as his cell phone battery.…

A:

Q: A producer claims that the lengths of manufactured parts have a variance less than or equal to 0.05…

A: Solution: Given information: n= 15 Sample size  s2= 0.08 inches2     Sample variance σ2= 0.05…

Q: It was founč that the correlation coefficient between two variables calculated from a sample of size…

A:

Q: 32 students from Batangas National High school shows a mean IQ of 111 while 30 students from…

A:

Q: A pooled variance estimate is useful for two-sample hypothesis tests of a normal mean when the…

A: It is given that the population variances are equal.

Q: If the variance of a national accounting examination is 828, how large a sample is needed to…

A: Given data: Variance  = 828 Margin of error = 4 points Confidence level = 99 % To calculate the…

Q: A random sample of 23 bags of apples (marked as 10 pounds each) received by a large grocery chain…

A: Solution: State the hypotheses. Null hypothesis: That is, the true mean of all bags is not less…

Q: Three years​ ago, the mean price of a​ single-family home was ​$243,741. A real estate broker…

A: We want to tell you, which one is the correct choice.

Q: 32 students from Batangas National High school shows a mean 1Q of 111 while 30 students from…

A: We want to test the hypothesis

Q: It is believed that Lake Tahoe Community College (LTCC) Intermediate Algebra students get more than…

A: A survey of 22 LTCC Intermediate Algebra students generated a mean x¯ = 7.24 hours   standard…

Q: Given that the researcher wants to be sure the mean difference in the change in hemoglobin levels…

A: From the provided information, Margin of error (E) = 0.2 g/dL Standard deviation (σ) = 1.2 g/dL…

Q: A tenured bus inspector claims that the difference between the variance of speeds of all city buses…

A: Given problem is : A tenured bus inspector claims that the difference between the variance of speeds…

Q: Does the data from the sample support his claim at a significance level of 0.05?

A: It is given that Sample size n = 60 Sample mean M = 3012 Sample SD s = 112 Level of significance =…

Q: please explain how to use the standard deviation from the 1-Var Stats statistical output to obtain…

A: Hint:  Standard devation =Variance

Q: The accounting department analyzes the variance of the weekly unit costs reported by two production…

A: See the handwritten solution

Q: Should be consider this score unusual? What is the value of the test statistic?

A:

Q: The Airline Passenger Association studied the relationship between the number of passengers on a…

A:

Q: Given that the researcher wants to be sure the mean difference in the change in hemoglobin levels…

A: It is given that the population proportion (attrition rate) is 0.25. Assuming that the required…

Q: Steve believes that his wife's cell phone battery does not last as long as his cell phone battery.…

A:

Q: The number of words in the active vocabulary of children of a particular age is normally distributed…

A: Obtain the minimum number of words the child would have to know to be in the top 2%. The minimum…

Q: A study was designed to investigate the effects of two variables - (1) a student's level of…

A: Consider X be the random variable which represents the scores on a standardized test. X follow…

Q: N Mean StDev SE Mean 90% CI 405 31.50 27.00 1.34 (29.29, 33.71) The 90% confidence interval for the…

A: It is given that the sample mean is 31.50. Sample standard deviation, s is 27. The sample size, n is…

Q: A SAMPLE SIZE OF 36 WAS DRAWN AND ITS MEAN WAS FOUND TO BE 80. TEST WHETHER THIS SAMPLE COULD HAVE…

A:

Q: If 31 were killed in 2823 accidents for those not wearing seat belts and 16 were killed in 7765…

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

Q: A correlation of +.20 means that [blank] of the variance in the outcome variable is accounted for by…

A: Solution: From the given information, r=0.20.

Q: The standard deviation of a sample of 100 observations equals 64. The variance of the variance…

A:

Q: Given that the researcher wants to be sure the mean difference in the change in hemoglobin levels…

A: Given data: Margin of error = 0.2 g/dL Standard deviation  = 1.2 g/dL To find the sample size

Q: Steve believes that his wife's cell phone battery does not last as long as his cell phone battery.…

A:

Q: A national business magazine reports that the mean age of retirement for women executives is 61.0. A…

A: Given x=61.5Sample sizen=95Standard deviationσ=2.5Null hypothesis :-Ho:u=61Alternative hypothesis…

Q: What is the effect of an increase in variance of the different scores in repeated measure design

A: Given information: It is given that the variance of the different scores is increased in repeated…

Q: For an analysis of variance comparing four treatments, MSpetween = 12. What is the value of…

A: Given: MS between=12 Total number of treatments = k = 4 The between degrees of freedom can be…

Q: Mr Chimbukutu, owner of a bakery said that the average weekly production level  of his company was…

A: We have given that  Mean(µ) = 11398 Standard deviations (σ) = √ 49729 = 223

Q: The authors of the paper "Length of Stay, Wait Time to Surgery and 30-Day Mortality for Patients…

A: As per mentioned in guidelines we answer the first question only Solution

Q: If the variance of Aeronautical Engineering board examination results is 144, what is the minimum…

A: Answer - If the variance of Aeronautical Engineering board examination results is σ2 =  144, what is…

Q: A traffic officer suspects that the mean number of car accidents every week is 4. A sample of 16…

A: Given,  n = 16 μ = 4x¯ = 7σ = 4α = 0.05

Q: the homogeneity of variances assumption states that the variance in the two samples must be equal?…

A: Homogeneity of variances always make about the population variance not about sample.