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What are the minimum, first quartile, median, third quartile, maximum, interquartile range, and range of the data set below? Make a box-and- whisker plot.
25, 25, 30, 35, 45, 45, 50, 55, 60, 60
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Descriptive Statistics. Descriptive statistics are used to describe the basic features of the data in a study.They provide simple summaries about the sample and the measures..Descriptive Statistics are used to present quantitative descriptions in a manageable form. In a research study we may have lots of measures.
A poll of 1125 adults in a certain country found that 55% identified themselves as the followers of some religion. The margin of error was 5 percentage points with 99% confidence.
The class ends the year with a mean of 68 and a stadard deviation of 9, the prof decides to bell curve the marks so that the top 10% gets an A (80%). What z score must a student achieve to recieve an A? What raw grade does this correspond to?
a survey of 25 randomly selected customers found the ages shown in years. the mean is 32.56 years and the standard
What is the sample proportion of people who moved to the suburb in the last five years? c. Does your sample appear to be representative of the population?
at a temperature of 25 degrees c the resistances of a type of thermistor are normally distributed with a mean of 10000
Modify the regular one-sample Wilcoxon W by replacing the ranks 1, 2, 3, 4, 5, 6, 7, 8 by the scores 1, 1, 2, 2, 2, 2, 3, 3, to obtain W1. Compute the mean and variance of W1.
The accompanying table shows proportions of computer salespeople classified according to marital status and whether they left their jobs or stayed over a period of 1 year
a manufacturer of microwave ovens is trying to determine the length of warranty period it should attach to its
The accompanying data on degree of spirituality for a sample of natural scientists and a sample of social scientists working at research universities appeared
Include the null and alternative hypothes, name the test being used, find the correct test statistic, the critical statistic, and a diagram.
Planning is a process of selecting the objectives & determining the course of action required to achieve these objectives. Which are the important observations subjected about planning?
Find the 98% confidence interval of the true mean. Assume the vehicle is normally distributed. Round your answers to two decimal places.
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