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Question: For each of the following, indicate whether or not the situation describes misleading data that the researcher may decide to investigate and potentially discard.
a. A sample of 50 students rate their agreement with 100 statements designed to assess their political attitudes. The rating scale goes from 1 (definitely disagree) to 7 (definitiely agree). One participant provides a response of 1 to all 100 statements.
b. A researcher measures the time it takes participants to hit a button upon hearing a warning signal. In her sample of 34 participants, she finds that the mean response time is 413 milliseconds (ms) with a standard deviation of 30 ms. One participant has a response time of 420 ms.
c. A researcher measures the time it takes participants to hit a button upon hearing a warning signal. In previous studies, she found that the mean response time is 413 ms with a standard deviation of 30 ms. In the current study, one participant had a response time of 1220 ms, which drives up the overall mean of the sample.
The chance the late flight is full is 0.7. The chance both flights are full is 0.6. Can we believe the two flights being full are independent events?
How likely is it that the store owner will make at least $7,000 if she implements your suggestion?
Using a significance level of 0.03, carry out a hypothesis test to determine if there is convincing evidence to support the claim that fewer than half of adult Americans can name at least one justice currently serving on the Supreme Court.
a television station estimates that 60 of college studentswatch the super bowl. for a sample of 240 students selected
Q. An owner of a chain of stores would like to predict weekly sales based on the number of customers who made a purchase. A random sample of 10 stores were selected. The weekly sales are in thousands of dollars.
Cell phone survey. What about drawing a random sample only from cell phone exchanges? Discuss the advantages and disadvantages of such a sampling method.
In the following probability model, X represents the number of activities a parent of a 6th-to-8th grade student is involved in.
a newspaper company received 14 entries in a contest. the probability of receiving a newspaper subscription order with
A linear correlation coefficient very close to 0 implies that there is a linear correlation between the averages, but a correlation between the averages does not imply a correlation between individuals as the conclusion incorrectly suggest.
Distinguish between the null hypothesis and the alternative hypothesis, giving the symbol for each.
The probability that during a sample of four (4) fishing days, the weight of the daily catch will be between 109 tons and 151 tons is?
Describe a 5-step hypothesis test of multiple means (using the one-factor or the two-factor ANOVA test process) for a particular claim related to your work or life environment.
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