Based on the data and Anova table, complete the parts of hypothesis testing Ho: ? Ha: ? Alpha: 0.05 F: 6.31 Condition: When to reject Ho? Conclusion?
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- Find the mean hourly cost when the cell phone described above is used for 240 minutes.Spacers are manufactured to the mean dimension and tolerance shown in Figure 29-12. An inspector measures 10 spacers and records the following thicknesses: 0.372" 0.376" 0.379" 0.375" 0.370" 0.373" 0.377" 0.378" 0.371" 0.380" Which spacers are defective (above the maximum limit or below the minimum limit)? All dimensions are in inches.Periodically, the county Water Department tests the drinking water of homeowners for contminants such as lead and copper. The lead and copper levels in water specimens collected in 1998 for a sample of 10 residents of a subdevelopement of the county are shown below. lead (?μg/L) copper (mg/L) 3.33.3 0.6280.628 3.33.3 0.2930.293 0.30.3 0.7830.783 4.74.7 0.1950.195 55 0.3780.378 1.41.4 0.2330.233 0.90.9 0.1010.101 0.90.9 0.6980.698 3.63.6 0.80.8 1.21.2 0.7610.761 (a) Construct a 99% confidence interval for the mean lead level in water specimans of the subdevelopment. _____≤μ≤_____ (b) Construct a 99% confidence interval for the mean copper level in water specimans of the subdevelopment. ______≤μ≤______
- Periodically, the county Water Department tests the drinking water of homeowners for contminants such as lead and copper. The lead and copper levels in water specimens collected in 1998 for a sample of 10 residents of a subdevelopement of the county are shown below. lead (μμg/L) copper (mg/L) 4.44.4 0.4840.484 2.72.7 0.0760.076 5.35.3 0.5950.595 3.33.3 0.1280.128 5.55.5 0.4690.469 1.71.7 0.4060.406 0.40.4 0.8480.848 0.70.7 0.0220.022 44 0.860.86 2.82.8 0.4250.425 (a) Construct a 99% confidence interval for the mean lead level in water specimans of the subdevelopment. blank≤μ≤blank (b) Construct a 99% confidence interval for the mean copper level in water specimans of the subdevelopment. blank≤μ≤blank19. Consider the following data. Replicate NaCI Concentration (mM) 0. 50 100 200 127.2 134.0 2.4 40.9 70.5 10.6 47.7 96.7 12.0 31.9 26.4 28.1 4.6 36.3 76.0 78.3 234Periodically, the county Water Department tests the drinking water of homeowners for contaminants such as lead and copper. The lead and copper levels in water specimens collected in 1998 for a sample of 10 residents of a subdevelopement of the county are shown below. lead (g/L) 2.9 0.2 5.1 4.2 5.5 1.2 0.133 0.774 0.214 0.671 0.444 0.234 0.357 0.761 0.176 0.888 (a) Construct a 99% confidence interval for the mean lead level in water specimans of the subdevelopment. OSMOSO copper (mg/L) 0.3 1.3 4.9 1.7 (b) Construct a 99% confidence interval for the mean copper level in water specimans of the subdevelopment. OSHSO
- Air samples for worker's exposure to oil mist were found to indicate the following levels in Table 1. Calculate TWA. Table 1 Sample Measured Amount Time of Sample 3 mg/m 28 mg/m Sample 1 2 hours Sample 2 6 hours (a) 6.57 mg/m³ (b) 6.75 mg/m' (c) 54 mg/m (d) 31 mg/mThe following data represent the concentration of dissolved organic carbon (mg/L) collected from 20 samples of organic soil. Assume that the population is normally distributed. Complete parts (a) through (c) on the right. 20.468.8130.9119.8029.8016.8714.8614.8627.1020.4610.308.0916.5114.9015.3522.4911.9033.679.7218.30 (a) Find the sample mean. The sample mean is ____ (Round to two decimal places as needed.) (b) Find the sample standard deviation. (Round to two decimal places as needed.) (c) Construct a 99% confidence interval for the population mean μ.6. Which of the following data is discrete? a. The age of students in Gr. 11 mixed math b. The time you spend studying for your wonderful math course c. The number of adults in your postal code who are fully vaccinated d. The volume of liquid sanitizer used during the pandemic
- Which EWMA chart below will yield ARL performance most close to that of cusum chart with k=1/2 and h=5? a. L=2.814, lamda=0.10 b. L=2.615, lamda=0.05 c. L=2.998, lamda=0.25 d. L=3.054, lamda=0.40 e. L=2.962, lamda=0.20Periodically, the county Water Department tests the drinking water of homeowners for contaminants such as lead and copper. The lead and copper levels in water specimens collected in 1998 for a sample of 10 residents of a subdevelopement of the county are shown below. lead (μμg/L) copper (mg/L) 4.4 0.643 2.4 0.57 1.5 0.46 2.6 0.895 5.9 0.2 3.4 0.54 3.8 0.245 1.6 0.583 5.7 0.769 1.7 0.215 (a) Construct a 9999% confidence interval for the mean lead level in water specimans of the subdevelopment. ≤μ≤2.40 Formation thickness and the corresponding porosity data are given in the following table. Calculate the weighted average porosity for the data. Porosity Thickness Porosity Thickness (%) (feet) (%) (feet) 24.2 2.5 13.5 1.5 20.7 1.5 12.2 4.0 18.9 2.0 11.8 3.5 18.0 3.2 16.5 5.5 15.5 4.0 25.2 3.0
