Mathematics, 19.10.2020 22:01 kaylee0424
Wearing a mask helps controlling seasonal influenza virus transmission. A guidance for the use of masks is available on the CDC (Centers for Disease Control and Prevention) website. Professor X has conducted a one-factor experiment using a completely randomized design to study how the duration of time that a specific medical mask remains effectively depends on the humidity levels. The calculations are summarized in an ANOVA of the one-way layout data he obtained. The results are recorded on a laboratory notebook. Recently, Professor X wanted to review the results of this experiment, but found his notebook has been partially damaged. On the data page, the data points for the first humidity level are blurred.
Humidity level Duration (Quarter-hour)
1 blurred
2 34, 19, 16, 30, 22
3 23, 26, 31, 17
4 17, 13, 22
Professor X didn’t remember the number of replica for Level 1. Luckily, he found an ANOVA for this data set.
Df Sum Sq Mean Sq F value Pr(>F)
Group 3 518.64 172.88 4.547 0.0295
Residuals 10 380.22 38.02
Professor X needs your help. Please recover the original data and explain how you find them.
Answers: 3
Mathematics, 21.06.2019 14:30, chintiffany4779
Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.
Answers: 3
Mathematics, 21.06.2019 20:30, nosugh
If m∠abc = 70°, what is m∠abd? justify your reasoning. using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°. using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°. using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality. using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.
Answers: 2
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Round each of the decimals to the nearest hundredth a. 0.596 b. 4.245 c. 53.6843 d. 17.999
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