Blog

Researchers want to know how much it costs to rent a furnished one bedroom apartment in State College. A random sample of 40 apartment complexes was obtained where the sample mean is $1100 and sample standard deviation is $60 when considering monthly rent. If the standard error is 9.5, which choice shows the correct calculation for a 95% confidence interval for the population mean, assuming the correct t-multiplier is 2.023?

The data provides information about 30 used Honda Accords. The two variables of interest are: Mileage: number of miles on the car when reading the odometer (range of values is 6700 to 86,900 miles) Price of car ($) Minitab was used to obtain the output found below Use all of the provided information.  Classify the following statements as true or false.

The data set provides information about 30 used Honda Accords. The two variables of interest are: Mileage: number of miles on the car when reading the odometer (range of values is 6700 to 86,900 miles) Price of car ($) Minitab was used to obtain the output found below Use all of the provided information when answering this question.  Classify the following statements as true or false.

From a random sample of 200 men from a men’s only health club, 40%, or 80, stated that they wished the club would stay open longer. The sample size is [answer1].  40% represents [answer2].

A random sample of 230 students in STAT 200 were asked whether or not they have ever been in a pedestrian accident while using technology. Forty six of these 230 STAT 200 students answered “yes.” The results are summarized in the Minitab output found below.   Using the provided 95% confidence interval, which is the correct interpretation? When considering STAT 200 students while using technology, we are 95% confident that the:

A mind reading experiment is done in which a subject tries to correctly identify which of 4 cards the researcher has randomly picked, where each card is equally likely. This is repeated for 200 trials. The null hypothesis is that the subject is guessing at random, while the alternative is that the subject can read minds and can guess the card selected at a rate higher than guessing at random. The subject actually gets 70 correct answers. Which of the following describes the probability represented by the p-value for this test? The probability of getting 70 or [answer1] correct, if the subject [answer2]. 

A news reporter writes an article with the headline “Coffee makes you smarter”. The article describes a study performed by surveying residents of a college town. Residents were asked the questions “How many cups of coffee do you drink daily?” and “How many years of post-secondary education have you completed?”. The researchers found a positive, linear association between the resulting variables.  Is the headline written for the article an accurate summary of the researchers’ results?

Fifteen students were asked how many nights a month do they study.  The responses are listed in the table found below.  Student 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Number of nights study/month 4 5 6 10 12 14 18 20 20 20 22 23 24 25 26 The mean is 16.6 nights/month Match the attribute of the sample with the appropriate answer.   

The amount of cooked beef in hamburgers was compared at two different fast-food places (Joe’s and Harry’s). The weights (in ounces) of hamburgers is obtained for: a sample from Joe’s and a sample from Harry’s, as shown below in the table.   Joe’s 4.2 4.8 4.9 4.4 4.7 4.1 4.5 4.4 4.3 Harry’s 4.5 4.9 4.6 4.7 5.1 4.8 5.0 4.7    Which of the following is being studied?

The five number summary for test scores (in points) was obtained from applicants who applied for a job is given by:   Min Q1 Med Q3 Max 42 48 50 52 60 Use the information from this five-number summary to identify the quantities listed below.