13. Number of Faculty The numbers of faculty at 32 randomly selected state-controlled colleges and universities with enrollment under 12,000 students areshown below. Use these data to estimate the mean number of faculty at all state-controlled colleges and universities with enrollment under 12,000 with92% confidence. Assume o = 165.1.211384396211224337395121356621367408515280289180431176318836203374224121412134539471638425159324

The CI for the true mean number of faculties is to be derived for the given level of surety (i.e.,…

Answered: Number of Faculty The numbers of…

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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For a certain year, SAT Verbal scores for 15 randomly selected high schools in urban and suburban areas in the United States are given below. Urban 565 550 549 536 535 535 522 516 504 497 495 489 445 444 435 Suburban 575 563 540 529 528 507 504 498 482 476 472 463 431 412 375 Is there a statistically significant difference in the average SAT Verbal scores for the two areas?
The data set below contains penetration values (the percentage of a country's population who are users) for a popular website in 22 of the world's largest economies. Complete parts (a) through (d) below. 42 44 35 28 10 21 38 29 51 5 22 57 10 35 80 58 42 51 17 51 56 42 Question content area bottom Part 1 a. Compute the mean, median, and the mode.
The number of hours of computer usage in a day of a random sample of 12 students was recorded as follows: 4.7, 3.9, 4.7, 4.8, 5.7, 6.1, 5.7, 5.3, 4.1, 3.1, 3.7, 4.0 What is the mean number of hours of computer usage?
In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the resulting damage (in dollars) was estimated. Five test vehicles of each type were crashed, with the results shown below. Research question: Are the mean crash damages the same for these three vehicles? Crash Damage ($) Goliath Varmint Weasel 1,660 1,290 1,000 770 1,440 2,120 880 1,320 1,850 1,960 1,820 1,210 1,240 960 1,960 Crash Damage in Dollars Goliath Varmint Weasel 1660 1290 1000 770 1440 2120 880 1320 1850 1960 1820 1210 1240 960 1960
Here is a set of sample data 6 7 8 19 21 96 44 51 59 95 63 2228 25 52 75 97 98 14 18 40 42 57 58 77 87 Identify the 5 number summary (min, Q1, median, Q3, max)
. Myers-Briggs: Actors Isabel Briggs Myers was a pioneer in the study of personality types. The following information is taken from MBTI Manual: A Guide to the Development and Use of the Myers-Briggs Type Indicator by Myers and McCaulley (Consulting Psychologists Press). In a random sample of 62 professional actors, it was found that 39 were extroverts. Let p represent the proportion of all actors who are extroverts. Find a point estimate for p. Find a 95% confidence interval for p. Give a brief interpretation of the meaning of the confidence interval you have found. Check Requirements Do you think the conditions np > 5 and nq > 5 are satisfied in this problem? Explain why this would be an important consideration.
Another type of painted ceramic vessel is called three-circle red-on-white ( Mimbres Mogollon Archaeology). At four different sites in the Wind Mountain archaeological region, the number of such sherds was counted in local dwelling excavations. TTT Site I Site II Site III Site IV 10 12 37 15 28 9 18 22 4 34 12 19 19 2 42 38 14 27 16 13 11 Shall we reject or not reject the claim that there is no difference in the population mean three-circle red-on-white sherd counts for the four sites? Use a 1% level of significance. (a) What is the level of significance? State the null and alternate hypotheses. O H,: H1 = H2 = H3 = Ha; H;: Exactly three means are equal. O H,: H1 = H2 = H3 = Ha; H;: Not all the means are equal. D H,: H1 = µ, = H3 = Hai H,: Exactly two means are equal. O H.: H1 = H2 = H3 = Hại H,: All four means are different. (b) Find SSTOT SSBET, and SSw and check that SSTOT = SSBET + SSw. (Use 3 decimal places.) SSTOT =L SSBET =L SSw=[ Find d.f. BET, d.f. w, MSBET, and MSw. (Use 3…
We asked UST employees to tell us how many megabytes of memory (RAM) they have on their computer. WWe would like to test to see if the mean amount of memory is the same for three different academic departments. We have the memory amounts for six faculty members' machines in the three departments shown below. Dept. 1 Dept. 2 Dept. 3 1 2048 4096 4096 2 2048 2048 4096 3. 2048 2048 8192 computer 4 2048 4096 8192 2048 2048 4096 6. 2048 8192 4096 Here is the ANOVA table: Analysis of Variance Source DF Adj SS Adj MS F-Value P-Value Factor 34952533 17476267 XXX 0.020 Error XX 51030699 3402047 Total XX 85983232 Calculate the value of the F test statistic and enter here:
The sample mean is often used as an estimator of the population mean because of its desirable properties, including: a. unbiasedness, consistency and efficiency Ob.consistency and minimum sampling error only Oc unbiasedness and consistency only Od. unbiasedness and efficiency only Oe. unbiasedness, consistency and minimum sampling error
An online instructor wants to estimate the mean amount of time that students spend in the online homework system on a particular homework assignment. The instructor takes a random sample of 30 students and looks up the amount of time recorded by the system for that assignment.
Used car auctions give car dealers an opportunity to increase their used car inventory by purchasing cars used as rental cars, assigned to company executives, and other similar activities. Suppose population 1 is all black cars sold at used car auctions, and population 2 is all white cars sold at used car auctions. Of interest is to estimate the difference in the mean sale price of all black cars sold at used car auctions and the mean sale price of all white cars sold at used car auctions. Based on this, using both the appropriate symbol and in words, state the one parameter of interest.

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