Statistics question and answers for November 28, 2023
- Q Air quality measurements were collected in a random sample of 25 country capitals in 2013 and then again in the same cities in 2014 We would like to use these...
- Q Which of the following is true based on the summary statistics below Min 3 Q1 6 Median 9 Q3 12 Max 20 O There are no outliers O There is...
- Q The next presidential election is predicted to have a fifty fifty split in votes for the top democrat and top republican candidate How many people should be polled to obtain...
- Q A car manufacturer has recently updated its assembly process with the aim of reducing the proportion of defective vehicles Before the process change the proportion of defective vehicles was 0...
- Q If P A 0 34 and P A or B 0 71 which of the following is false O P A given B 34 if A and B are mutually...
- Q The National Center of Education Statistics conducted a survey of high school seniors collecting test data on reading writing and several other subjects Here we examine a simple random sample...
- Q For questions 9 10 Suppose we are interested in predicting the temperature in Fahrenheit of the striped ground cricket from their chirps per second We take a simple random sample...
- Q A factory produces motorcycles of which 1 are defective Ten motorcycles are randomly selected from production What is the probability there are at least two defective motorcycles out of the...
- Q Which of the following is NOT a necessary condition that must be checked when performing a hypothesis test for a difference in two proportions Success failure condition O Independence between...
- Q Researchers are interested in studying the effects of a new diet program They collect data from participants Each participant s weight is recorded before and after the diet program The...
- Q For problems 14 15 let X be from a binomial n 20 p distribution If the variance of X is 5 what are the possible values of p 0 5...
- Q This question 1 point s possible A random sample of 740 births in New York State included 357 boys and that sample is to be used for a test of...
- Q Bernard ran an experiment to test optimum power and time settings for microwave popcom His goal was to deliver popcorn with fewer than 10 of the kernels left unpopped on...
- Q A credit card company tested the effectiveness of a promotional campaign by recently sending out offers to a random sample of 60 000 cardholders Of those 1491 registered for the...
- Q In the last quarter of 2007 a group of 64 mutual funds had a mean return of 5 3 with a standard deviation of 3 4 Consider the Normal model...
- Q A random sample of 180 students was asked how many songs were in their digital music library and what fraction of them was legally purchased Overall they reported having a...
- Q In a survey on downloading music a poll asked 711 Internet users if they ever downloaded music from an Internet site that was not authorized by a record company or...
- Q Idenury the null and alternative hypotheses to test each of the following situations Complete parts a through c a An article from a business journal looked at 1126 CEOs from...
- Q A random sample of the price of gasoline from 30 gas stations in a region gives the statistics below Complete parts a through y 3 89 s 0 25 a...
- Q H Pi P2 You obtain a sample from the first population with 118 successes and 363 failures You obtain a sample from the second population with 32 successes and 192...
- Q Matrix Products Consider the matrices 2 84 8 1 23 8 8 A B 5 8 6 6 Of the possible matrix products ABC ACB BAC BCA CAB CBA which...
- Q Which statement about the S3 method is incorrect The t test is an example of the method The plot data frame is an example of the method O It belongs...
- Q Polymorphism and inheritance are two of the main reasons to use OOP As R is primarily a functional programming language what functions does the S3 OOP system implement polymorphism and...
- Q Which of the following functions is not the example of a polymorphic function in sd summary plot
- Q The job of an S3 generic is to perform method dispatch Which statement about generics in S3 is correct We need to name generic function using a special naming scheme...
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