an analytical balance (#2) was used to determine the weight of a given bottle‚ the bottle’s lid‚ and the combination of the two. After taking four measurements of each‚ I then calculated the means and standard deviations. For the data recorded in table I the values computed for the standard deviations were very small (.0001 g - .0002 g)‚ so the measurements given by the analytical balance are very precise. After the means were calculated‚ I compared the weight measured of the lidded bottle to the weight
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Statistics – Case Chapter 9 1. It is not proper to multiply the average order size by the number of addresses (1.3 million people = population) in the target mailing because the sample is representative of the 600‚000 people in the database‚ not the 1.3 million target population‚ thus you cannot use the average of the sample as an estimate for the population. Also‚ multiplying by 1.3 million would suggest that the entire 1.3 million people would be purchasing. 2. It is better to multiply the endpoints
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inflection points located? Where the slope starts to drop off at. 2. What is the standard normal distribution? A standard Normal distribution is a Normal curve with a mean of 0 and a standard deviation of 1. 3. What information does the standard normal table give? The area that falls to the left of the given z-score. 4. How do you use the standard normal table (Table A) to find the area under the standard normal curve to the left of a given z-value? Draw a sketch. Locate the z-score to the
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AP/IB Biology Lab Assessment The effect of various fruit and vegetable cell membranes on their water potential Independent variable: Type of fruit or vegetable. (Produce used: Russet potatoes‚ Pascal celery‚ Gala apple‚ Navel orange‚ and Imperator carrot). The fruit or vegetable will be placed in six 56.7 gram cups‚ ranging with sucrose molarities of 0 (distilled water)‚ 0.2‚ 0.4‚ 0.6‚ 0.8‚ 1.0‚ with 5 trials‚ leading to 30 cups for each produce variable. Dependent variable: The water potential
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Current New Mean 270.275 267.5 Variance 76.61474291 97.94871868 Standard Deviation 8.7529848 9.8969045 Standard Error 1.383968415 1.564838 Using the formula‚ the interval estimation was calculated. Therefore‚ with confidence at 95% the differences between the mean distances are in between -1.385740214 and 6.935740214 yard. The sample size is said to have an inverse relationship with standard error: as the sample size increases‚ the
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For the standard normal probability distribution‚ the area to the left of the mean is a. –0.5 c. any value between 0 to 1 b. 0.5 d. 1 Answer: B The total area under the curve is 1. The area on the left is the half of 1 which is 0.5. ____ 2. Which of the following is not a characteristic of the normal probability distribution? a. The mean and median are equal b. The mean of the distribution can be negative‚ zero‚ or positive c. The distribution is symmetrical d. The standard deviation
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percentage of people in the fifty states and District of Columbia who do not have health insurance? Median: 13.50 Round your answer to 2 decimal places as necessary.c. What is the standard deviation of the percentage of people in the fifty states and District of Columbia who do not have health insurance?Standard deviation: 4.10 Round your answer to 2 decimal places as necessary. Answer Key: 14.15‚ 13.50‚ 3.96|4.16 | Question 2 of 17 | 1.0 Points | The worksheet “Insurance” in the Excel workbook
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7) Data from a small bookstore are shown in the accompanying table. The manager wants to predict Sales from Number of Sales People Working. Number of sales people working | Sales (in $1000) | 4 | 12 | 5 | 13 | 8 | 15 | 10 | 16 | 12 | 20 | 12 | 22 | 14 | 22 | 16 | 25 | 18 | 25 | 20 | 28 | x=11.9 | y=19.8 | SD(x)=5.30 | SD(y)=5.53 | a) Find the slope estimate‚ b1. Use technology or the formula below to find the slope. b1=rsysx Enter x‚y Data in TI-84 under STAT > STAT
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with over 85‚000 members in 129 countries. Since 1963 the organization has developed and administered the renowned Chartered Financial Analyst Program. With a rich history of leading the investment profession‚ CFA Institute has set the highest standards in ethics‚ education‚ and professional excellence within the global investment community‚ and is the foremost authority on investment profession conduct and practice. Each book in the CFA Institute Investment Series is geared toward industry practitioners
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the most appropriate descriptive statistics in the following table for the 3 variables of interest‚ as a starting point in the analysis: ASSETS YLD_7DY YLD_30DY Mean 1994.8089 4.1622 4.0982 Median 496.5000 4.1800 4.1300 Mode 1.70 4.16 3.89 Std. Deviation 4644.1251 .3262 .3253 Range 27003.90 2.12 2.12 Minimum 1.70 2.67 2.61 Maximum 27005.60 4.79 4.73 For assets‚ it is very clear that the range is very big; this is a first indication that the assets data has a lot of variability. Also‚ mean and median
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