et-distribution curve will eventually approach a normal curve as we increase the degrees of freedom O True False
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A: A variable is a characteristic that is being measured.
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Q: Which of the four sets of data represents a normal distribution? O { 10, 12, 13, 13, 13, 14, 16} O…
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Q: In the normal curve, the measure of variability all coincides at the center. O TRUE FALSE
A: True or False
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A: Standard normal distribution: The standard normal distribution is a special case of normal…
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Q: Jaily demand for gladiole at a flower shop is approximately normally distributed with mean sales 12…
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Q: normal normal distribution has a mean of u=100 and o=20.
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Q: Properties of a normal distribution then explain it in own words
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- Estimating Mean SAT Math Score The SAT is the most widely used college admission exam. (Most community colleges do not require students to take this exam.) The mean SAT math score varies by state and by year, so the value of u depends on the state and the year. But let's assume that the shape and spread of the distribution of individual SAT math scores in each state is the same each year. More specifically, assume that individual SAT math scores consistently have a normal distribution with a standard deviation of 94. An educational researcher wants to estimate the mean SAT math score (u) for his state this year. The researcher chooses a random sample of 681 exams in his state. The sample mean for the test is 486. Find the 99% confidence interval to estimate the mean SAT math score in this state for this year. Use the unrounded values in Excel to find the answers to #2, #3 and # 4. 1. The z-value is -- ✔ 2. The standard error has a value of -- 3. The margin of error has a value of - 4.…Define the chi-squared distribution?he sampling distribution of differences between means approximates a normal cure whose is zero. mode median mean standard deviation
- Watch this Khan Academy Empirical Rule video: https://www.youtube.com/watch?v=OHR126AFFBU Use the Empirical Rule. (Do not use technology. Technology will give a slightly different answer.) Draw a sketch of the normal distribution and label the mean and 1, 2, and 3 standard devitons above and below the mean with computed values. Assume that the weight of 1-year-old girls in the USA is normally distributed with Mean = 9.5 kg, Standard Deviation = 1.1 kg. (a) 68% of the data is between which 2 values? kg -- kg (b) 95% of the data is between which 2 values? kg -- kg (c) What percentage of the data is less than 8.4 kg? rse (d) What percentage of the data is between 7.3 kg and 11.7 kg? (w) What percentage of the data is more than 12.8 kg? Submit Question ere to search R1. Describe the key features of the normal curve and explain why the normal curve in real-life distributions nevermatches the model perfectly.Write what you know about normal distribution and standard distribution ?
- Determine wheaten the graph can represent a normal curve, if it cannot explain why ?A directional hypothesis test has a critical region that consists of the extreme ends of both the left and right side of the t distribution. True or false?Data and summary statistics about college professor's salaries teaching at the Master's level was gathered from nine institutions. To better analyze the data was separated by gender to create two mound shaped distributions. Men had a mean of $67,691 and standard deviation of $14,506, while women had a mean of $65,323 and a standard deviation of $13,274. a b c d The value at tick mark "a" is The value at tick mark "d" is e Assume the tick marks are spaced a distance of 1 standard deviation apart. On your scratch work, label the horizontal axis of the normal curve above based on the men's salary, whose mean is $67,691 and standard deviation is $14,506 (i.e. label the values of tick marks a-g). The value at tick mark "e" is f g What percent of men's salaries are between $38,679 and $96,703? Your final answer should include a percentage sign (like 61%).