Electric motors are assembled on four different production lines. Random samples ofmotors are taken from each line and inspected. The number that pass and that fail theinspection are counted for each line, with the following results:Line24Pass482467458404Fail57593747Can you conclude that the failure rates differ among the four lines?

State the test hypotheses. Null hypothesis: H0: The failure rates do not differ among four lines.…

Answered: Electric motors are assembled on four…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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answer the questions in the picture please.
2. In a population it is estimated that 20% have a desired trait of interest for the researcher. The researcher wants to know how many people on average he has to draw from a population to get 2 people with the trait. Use rows 20-24 of the Random Number Table to carry out the simulation. Explain clearly how you set up the problem and report your findings. Answer:
A psychologist would like to examine the effects of a new drug on the activity level of animals. Three samples of rats are selected with n=5 in each sample. One group gets no drug, one group gets s small dose, and the third group gets a large dose. The psychologist records the activity level for each animal. The data from this experiment are presented below. No drug Small dose Large dose 5, 3 , 1 , 1 , 5 5, 5, 9, 6, 5 10, 12, 9, 6, 8 =3, SS=16 =6, SS=12 =9, SS=20 Do these data indicate any significant differences among the three groups? Test with α=0.05. Compute the effect size and interpret the result.
ANSwer part b in frq style and descriptive
. A developmental psychologist would like to determine how much fine motor skill improves for children from age 3 to age 4. He takes a random sample of 9 three-year old children and gives each a manual dexterity test that measures fine motor skill. He tests these same children a year later, when they are each four-years old. Higher scores on this test indicate better fine motor skills. Scores are recorded in the table below. Is there a significant difference in the motor skills from age three to four? Test with an α = 0.05. What type of error is possible based on the outcome? What is the mean motor skill score for the children at age three? What is the mean motor skill score for the children at age four? Explain the advantage of using a dependent measures design over the independent measures design. What are some disadvantages?
he federal government is interested in determining whether salary discrimination exists between men and women in the private sector. Suppose a sample of 16 women and 25 men are taken from the population of first-level managers in the private sector. The information is summarized as follows (amounts are in thousands of dollars): Women Men n 16 25 X¯ $26.4 $33.3 S $2.6 $3.2 Test H0 : µ1 = µ2 against H1 : µ1 = µ2 where µ1 and µ2 are the mean salary of first level female and male managers, respectively. Use α = 0.05 and assume equal variances. Test statistic = −2.68 and reject H0 Test statistic = −7.22 and reject H0 Test statistic = −2.68 and fail to reject H0 Test statistic = −7.22 and fail to reject H0
1. A dog groomer is often asked if small dogs bark more than larger dogs. To test this, he logs the number of separate barking episodes per day for three size dogs: small, medium, and large. In a separate file you will find the number of barking episodes for 12 dogs. On average, small dogs barked the most Mean: 7.25 On average, medium sized dogs barked the least Mean: 2.75 A. Do the different size dogs bark a significantly different number of times? Test with an α = 0.05. B. If appropriate, use Tukey’s HSD post hoc test and report where the differences are. If inappropriate, state why. C. Calculate and interpret the effect size.
YOU are in charge of a new products being launched by "Incredible Circuits". Mr. Eleck Trikal, C.E.O. of the company, has seen the need to calculate the Reliability of his new product after 10, 20, 30, and 50 hours of use. This new product is basically made with four components: A B, C, and D; and its design is included below: BAB As a good manufacturing engineer, you take 10 samples for each component, and test them until failure. The following are the times obtained: COMPONENT A: 8, 9, 18, 28, 35+, 43+, 59+, 65, 75, and 78 (+ means censoring) COMPONENT B: 8, 17+, 22, 29, 35, 39, 49+, 55, 59+, and 78 (+ means censoring) COMPONENT C: 2, 23, 24, 35+, 53, 55, 62+, 66+, 76, and 83 (+ means censoring) COMPONENT D: 3, 18, 24, 35, 38, 49, 58, 59, 66, and 79 (no censoring)
Please help me with this question.
John is skeptical of his friend's claim that Gerald's coffee house has much stronger coffee (in terms of caffeine content) than Sabine's Beans does. So John takes a random sample of large coffees from both shops. and measure the amount of caffeine content in each coffee. Here is a summary of the results: Gerald's Coffee HouseSabine's BeansMean193.06 mG155.97 mGSt. Dev.6.47 mG8.58 mGNumber of Cups6572 John wants to test the null hypothesis H0 : µ1 ≥ µ2 against the alternative hypothesis Ha : µ1 < µ2 at 95% confidence level. What is the critical value to accept/reject the null hypothesis against the alternative hypothesis?
If two large random samples are drawn from two populations, each having a mean of $100, the relevant sampling distribution of their difference has a mean of a. 200 b. The Sum of the 2 Sample Means C. 0 D. The difference between the two sample means.
Ten samples of 20 boxes of cereal are weighed, and the means of the samples are found to vary from 364.4 to 371.9 grams. If ten more samples of 30 boxes each were weighted, which of the following ranges of means would you most likely expect to find among the ten samples, given μ=368 grams and s=15 grams? A. 368.1-368.2 B. 365.3-370.7 C. 366.4-369.1 D. 364.371.9

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