Deviation boundary% of data points within boundary Probability of any particular data point being outside boundary +20 +36 68.0 95.40 99.70 Csp Tm 8.00M dCi 32.0% 4.60% 0.30%
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Deviation boundary% of data points within boundary
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- cmarks Window Help A ccco.desire2learn.com Home Community - CCA (25) D2L. Module 4 Test - MAT120C03 Math. • Search Results - Films On Demand Question 9 For a standard normal distribution, find: P(z Next Questionpre-test post-test Mean Variance -2.25 0.75 9.30 13.30 Observations 12 12 Pearson Correlation 0.9478 Hypothesized Mean 0 Difference df 11 t Stat 2.076 P(T<=t) one-tail 0.035 t Critical one-tail 1.796 P(T<=t) two-tail 0.065 t Critical two-tail 2.201The standard deviation for the high-temperature group is _________ the standard deviation for the low-temperature group. Therefore, an increase in temperature_______________variability in tensile strength.options for first is greater than, smaller than, similar to options for second blank is does not influence or influences
- Kurtosis describes the peakness of the curve on the median mean modeQuestion Heip How do the requirements for a chi-square test for a variance or standard deviation differ from a z-test or a t-test for a mean? Choose the correct answer below. OA A chi-square test can only be used when the population has a normal distribution. On the other hand, a z-test or a t-test can only be used when the sample size is at least 30. O B. A chi-square test can only be used when the population has a normal distribution. On the other hand, a z-test or a t-test can be used when either the population has a normal distribution or the sample size is at least 30. O C. Az-test or a t-test can only be used when the population has a normal distribution. On the other hand, a chi-square test can be used when either the population has a normal distribution or the sample size is at least 30. O D. Az-test or a t-test can only be used when the population has a normal distribution. On the other hand, a chi-square test can only be used when the sample size is at least 30. Click to…Remaining Time: 2 hours, 09 minutes, 41 seconds. * Question Completion Status: O unchanged O increased by 300 % O decreased by 300 % QUESTION 2 A certain machine makes electrical resistors having a mean resistance of 50 ohms and a standard deviation of 4 ohms. Assuming that the resistance follows a normal distribution and can be measured to any degree of accuracy, what percentage of resistors will have a resistance exceeding 56 ohms'? O 35.2 % O 93.32 % 64.8 % 6.68 % QUESTION 3 To estimate the average time it takes to assemble a certain computer component, the industrial engineer at an electronics firm timed 16 technicians in the performance of this task, getting a mean of 13 minutes and a standard deviation of 3.1 minutes. Construct a 99% confidence interval of the actual average time required to do the job assuming that the actual time follows a normal distribution. O (10.716, 15.284) O (10.983, 15.017) O (11.004, 14.996)
- This C The weight of an organ in adult males has a bell-shaped distribution with a mean of 310 grams and a standard deviation of 40 grams. Use the empirical rule to determine the folowing (a) About 99.7% of organs will be between what weights? (b) What percentage of organs weighs between 230 grams and 390 grams? (c) What percentage of organs weighs less than 230 grams or more than 390 grams? (d) What percentage of organs weighs between 270 grams and 430 grams? (a) and grams (Use ascending order.) (b)% (Type an integer or a decimal.) (c) % (Type an integer or a decimal.) (d) % (Type an integer or decimal rounded to two decimal places as needed.) Enter your answer in each of the answer boxes. e Type here to search 近GMAT scores are approximately normally distributed with a mean of 547 and a standard deviation of 95. Estimate the percentage of scores that were(a) between 452 and 642. ________%(b) above 832._________ %(c) below 452. ___________%(d) between 357 and 642. ___________% Answer the blanks.K Light bulb lifetime. Find the mean and median for the data in the following table. Interval Frequency 799.5-899.5 2 Life (Hours) of 50 Randomly Selected Light Bulbs 899.5-999.5 999.5-1,099.5 8 20 The mean is 1,099.5-1,199.5 1,199.5-1,299.5 10 10
- Please refer to the lesson (sketch also the normal curve)nvestigate 12 temperature measurements are made in a laboratory over a period of time and the following values are obtained: 46,45,45,47,48,49,50,52,51,51,14,36 Use Chauvenet's criterion to identify any outliers in the data which should be rejected. Don't use the chauvenets table. Use the normal distribution table. es/standard-normal-table 0.06 0.07 0.08 Z 0.00 0.0180 0.0120 0.0160 0.0199 0.0239 0.0279 0.0319 0.0000 0.0040 0.0398 0.0438 0.0478 0.0517 0.0557 0.0596 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 = 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 20 1.9 2.0 2.1 2.2 2.3 74 2.4 2.5 2.6 24 2.7 2.8 2.9 3.0 3.1 = Ee 0.04 0.05 0.02 02 0.03 0.1179 0.1217 0.1255 0.1293 0.1331 0.1368 0.1554 0.1591 0.1628 0.1664 0.1700 0.1736 3.5 3.6 3.7 3.8 0.0793 0.0832 0.0871 0.0910 0.0948 0.0987 0.1026 0.10 1480 0.1517 0.1879 0.1915 0.19502019 0.2054 0.2088 0.2123 0.2157 0.2190 0.2224 0.2422 0.2454 0.2486 0.2517 0.2549 0.1985 0.2324 0.2257 0.2293 0.2580 0.2611 0.2642 0.2389 Amor P7704 0.2764 0.2794 0.2823 0.2852…sho 40 28.5 min Population standard deviation dev 35.2 min 7.2 min nat Source: www.census.gov 9.1 min Sou O Heights of 9-Year-Olds At age 9 the average weight 13. P (21.3 kg) and the average height (124.5 cm) for both boys and girls are exactly the same. A random sample of 9-year-olds yielded these results. At a = 0.05, do the fo data support the given claim that there is a difference in heights? Boys Girls 60 50 Sample size Mean height, cm 123.5 126.2 120 98 Population variance Source: www.healthepic.com nital Stays The average length of “short hat for
