### Testing company-s claim

Assignment Help Basic Statistics
##### Reference no: EM1316913

Q1) Table illustrates the SAT verbal test scores for 9 randomly selected female students and 14 randomly selected male students. Suppose that sat verbal test scores are normally distributed.  At a = 0.01, test claim that test score variance for females is different from that for males.

 Female 480 610 340 630 520 690 540 Male 560 680 360 530 380 460 630 Female 600 800 Male 310 730 740 520 560 400 510

Q2) Steel pipe fittings company claims that yield strength of its nontempered couplings is more variable than that of its tempered couplings. Random sample of 9 tempered couplings has standard deviation of 13.1 megapascals, and similar sample of 9 nontempered couplings has standard deviation of 25.4 megapascals. From past data, it is recognized that company's production process results in normally distributed yield strengths. Test company's claim at a = 0.05.

#### Questions Cloud

 Understanding of chemistry basics : Understanding of chemistry basics - which of the following is not changed by the activity of an enzyme during a chemical reaction? Decision of ceo of automaker : The CEO of a major automaker overheard one of its division managers make the following statement regarding the firms's production plans: Confidence interval estimate for the proportion : When would you use hypothesis testing and when would you use confidence intervals? Florida state university administers a mathematics : Florida State University administers a mathematics placement test to students where they 1st enter the university. Testing company-s claim : From past data, it is recognized that company's production process results in normally distributed yield strengths. Test company's claim at a = 0.05. Computing yield to maturity for u.s. treasuries securities : Computing yield to maturity for U.S. Treasuries securities and examine the chart WSJ or IBD provides Regarding the national defence authorization act : Cyber security Act of 2012, National Defence Authorization Act (NDAA), and Library Services and Technology Act are the three recent laws dealing with computer crimes. Determinations of minimum wages in perfectly competitive : Briefly discuss and illustrate the circumstances under which the minimum wage would (1) not lead to unemployement, amd (2) not cause a reduction in the total earnings of low-wage workers who are still employed. Make the equation in its equivalent exponential form : Make the equation in its equivalent exponential form

### Write a Review

#### Evaluate the slope of the least-squares regression line

If we fit the least-squares line to the 12 data points (one for each month) we obtain the following results from a software package. Notice that temperature is taken as the explanatory variable and crawling age as the response.

#### What is the approximate permutation test p-value

What is the approximate permutation test P-value and What is the permutation test P-value for testing the equality of the means versus the hypothesis that the mean change for the treatment group is larger than the mean treatment for the control gro..

#### Linear regression model-multiple

How variable is the number of service calls with which Sam's department must deal?

#### Hypothesis testing using chi-square distribution

At the .01 significance level, is there a relationship between job pressure and age?

#### Biggest problem facing education today

Survey on What do you think is the biggest problem facing education today. One problem with exit polls may be that the wrong "key precincts" were chosen.

#### Describe hyper-geometric distribution

What is the probability that two of absent students were girls.What is the probability that two of absent students were boys.

#### Introduction to independent samples t-test

prevent coronary artery vasoconstriction and the attendant reduction in blood flow to the heart and mechanical function.

#### Process control in sqc

A process is out of control when:

#### Anova procedure is a statistical approach

The ANOVA procedure is a statistical approach for determining whether or not:

#### Urrent policy having an effect on smog in the results

As we can say there is 5.5 percent chance of seeing the current policy having an effect on smog in the results we observed from natural sampling variation.

#### Testing hypotheses for critical value

The hypothesis is to be tested at the 5% level of significance. The critical value from the table equals:

#### Computing probability values using random number table

The choices are to be designated by the letter a, b, c, d, and e. The professor wishes to use a random-number table to determine which letter choice should correspond to the correct answer for a question. Using the number correspondence 1 for a, 2 fo..

#### Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!