Statistics question and answers for December 25, 2023
- Q 11 The GMAT continued Exercise 17 1 describes a study of the performance on the GMAT of college seniors in the Philippines You stated the null and alternative hypotheses in...
- Q Job Satisfaction Find the P Value The P value in Example 17 6 is the probability taking the null hypothesis 0 to be true that x takes a value at...
- Q Stating Hypotheses In planning a study on the number of days in the last 30 that high school students texted while driving sometime during the day a researcher states the...
- Q 5 Too Early The examinations in a large multisection statistics class are scaled after grading so that the mean score is 75 The professor thinks that students in the 8...
- Q 80 Consider the system of components connected as in the accompanying picture Components 1 and 2 are connected in parallel so that subsystem works iff either 1 or 2 works...
- Q 20 A certain factory operates three different shifts Over the last year 200 accidents have occurred at the factory Some of these can be attributed at least in part to...
- Q 6 In October 1994 a flaw in a certain Pentium chip installed in computers was discovered that could result in a wrong answer when performing a division The manu facturer...
- Q 4 pts The amount of time in minutes it will take students to answer a homework question follows the probability distribution given below Use the graph to answer the following...
- Q 8 pts The height of a certain plant after 1 week ranges from 1 cm to 5 cm with a uniform probability distribution The graph is given below Using this...
- Q Given x and x distributions that are normal or approximately normal with unknown and 2 the value of t corresponding to x x has a distribution that is approximated by...
- Q of employed adults in the United States held multiple jobs A random sample of 61 employed adults is chosen Use the TI 84 Plus calculator as needed B Part 0...
- Q A survey of 1721 people found that 15 9 of individuals purchase their religious books primarily at a Christian bookstore a What is the sample proportion of success p 0...
- Q Below is the data for the exam scores of a sample of 9 students The population is normally distributed 85 70 66 95 77 94 65 79 84 a Find...
- Q Suppose you have sample data where 20 and n 25 You want to create a 99 confidence interval for the mean Also the sample standard deviation is 4 a What...
- Q In this problem assume that the distribution of differences is approximately normal Note For degrees of freedom d f not in the Student s t table use the closest d...
- Q based on n 23 observations The original datasets had the following proportions of successes p 0 13 p 0 22 p 0 30 p 0 43 A Count C Count...
- Q as the standard normal distribution but it reflects the greater variability that is expected with small samples 4 t distributions are used with small samples or when is not known...
- Q poll conducted in 2013 found that 52 of all US adult Twitter users get at least some news on witter However this value was based on a sample so it...
- Q Let s say that you want to estimate the proportion of YouTube videos which take place outside define outside to be if any part of the video takes place outdoors...
- Q Researchers have been studying acorns produced by trees in a certain region The acorns are used as a food source by various animals The researchers have recorded the mass of...
- Q 4 pts IQ scores for PhD students is normally distributed with a mean of 110 pts and standard deviation of 17 pts Find the Z score range corresponding to P...
- Q 8 pts The height of a certain plant after 1 week ranges from 1 cm to 5 cm with a uniform probability distribution The graph is given below Using this...
- Q 14 pts The life expectancy of a microwave oven is normally distributed with an average of 16 7 years and a standard deviation of 3 1 years Round all probabilities...
- Q Be sure to fully justify your responses when appropriate Show where all your numbers came from if not explicitly written Don t forget Units and use complete sentences when appropriate...
- Q Unal Benford s Law claims that numbers chosen from very large data files tend to have 1 as the first nonzero digit disproportionately often In fact research has shown that...
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