Claim: μ₁ = ₂; α = 0.01 Population parameters: o₁ = 3.5, 0₂ = 1.6 Sample statistics: X₁ = 15, n₁ = 30, X₂ = 13, n₂ = 26
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- Exhibit 9-5 n = 16 HO: u z 80 x = 75.607 Ha: µ < 80 o = 8.246 Assume the population is normally distributed. 4. Refer to Exhibit 9-5. The p-value is equal to .0332 .9834 -.0166 .0166Find the value of “z sub alpha” z0.15 And for z0.02Use the given data set to complete parts (a) through (c) below. (Use α=0.05.)
- A sociologist wants to determine if the life expectancy of people in Africa is less than the life expectancy of people in Asia. The data obtained is shown in the table below. Africa Asia = 63.3 yr. 1 X,=65.2 yr. 2 o, = 9.1 yr. = 7.3 yr. n1 = 120 = 150An article in the San Jose Mercury News stated that students in the California state university system take 4.5 years, on average, to finish their undergraduate degrees. Dr. Lewis believes the mean time for students at Clayton State University is longer than this average. A survey of 49 graduates from Clayton State had a mean time of 5.1 years to complete their Bachelor's degree, with a sample standard deviation of 1.2 years. Correctly identify the null and alternative hypotheses for this study:Exhibit 10-11An insurance company selected samples of clients under 18 years of age and over 18 and recorded the number of accidents they had in the previous year. The results are shown below. Under Age 18 Over Age 18 n1 = 500 n2 = 600 Number of accidents = 180 Number of accidents = 150 We are interested in determining if the accident proportions differ between the two age groups. Refer to Exhibit 10.11. The p-value is _____. less than .001 more than .10 .0228 .3
- Exhibit 10-11 An insurance company selected samples of clients under 18 years of age and over 18 and recorded the number of accidents they had in the previous year. The results are shown below. Under Age 18 Over Age 18 N1 = 500 n2 = 600 Number of accidents = 180 Number of accidents = 150 We are interested in determining if the accident proportions differ between the two age groups. Refer to Exhibit 10-11. The value of the test statistic is .96 1.96 2.96 О 3.96Samples are collected from the River X and pH values are observed. 9 different pH values are listed in table 3. Table 3 Concentrations 4.2 Draw box plot and find a. Bowley's coefficient of skewness b. Karl Pearson's coefficient of skewness c. Third moment 3.8 6.0 3.5 8.1 4.9 4.1 3.2 4.07.Skelch the resian encbsed bithe Guen Cunves. and find the area. X= 20-5%, X= 5y²- 20
- Radon is a gas emitted from the ground that can collect in houses in buildings. At certain levels it can cause lung cancer. Radon concentrations are measured in picocuries per liter (pCi/L). A radon level of 4 pCi/L is considered “acceptable” Radon levels in a house vary from week to week. In one house, a sample of 6 weeks had the following readings for radon level (in pCi/L): 1.9 2.8 3.9 3.9 4.2 5.7 Find the variance and standard deviation (definitional formula). Show your work using a table.n. ln. N Ciectical Cnyineers GToup as Cv = 40.32 % The following data represent the results obtained from the specific gravity (S.G.) test performed ina soil laboratory including * ?for sand samples. Find the mode Number of Specific Gravity 2.30-2.39 Samples 2.40-2.49 2.50-2.59 4 6. 2.60-2.69 12 2.70-2.79 14 2.80-2.89 2 3.35-3.40 2.10-2.15 2.20-2.25 2.70-2.75 2.80-2.85 2.30-2.35 2,60-2.65 2.40-2,45 2.50-2.55 2.90-2.95 ارفع اجابتك بشكل ملف wdf او صورة 1O 0O 10 O O O O OThe shelf life of a particular dairy product is normally distributed with a μ of 12 days and a σ of 3 days. What percent of the products last 15 or more days?