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Several psychology students are unprepared for a surprise true/false test with 12 questions, and all of their answers are guesses.
A) Find the mean and standard deviation for the number of correct answers for such students
B) Would it be unusual for a student to pass by guessing and getting at least 10 correct answers? Why or why not?
A survey found that 85% of women in a given city enjoy shopping online. Suppose you randomly selected 6 women from the city and ask them whether or not they enjoy shopping online. Find the probability that exactly 4 say they enjoy shopping online.
Create the 99% confidence interval on difference of average ages for viewers of the two TV programs. How can you interpret interval?
A researcher estimates an AR(1) model with an intercept and finds that the OLS estimate of Beta1 is 0.95, with a standard error of 0.002.
The credit score of a 35 year old applying for a mortgage at Ulysses Mortgage Associates is normally distributed with a mean of 600 and a standard deviation of 100.
The following data refers to gross earned income, in thousands of dollars per year, and level of taxation on that income.
A manager hopes to improve the sales figures for 10 employees by sending them to a motivational seminar. To test the effectiveness of this seminar
A box of 9 gloves contains two left handed gloves and seven right handed gloves. If two gloves are randomly selected from the box, without replacement, what is the probability that both gloves will be right handed?
assume that the data has a normal distribution. also assume that the standard deviation of the population sigma is
A concessionaire for the local ballpark has made a table of conditional values for the different alternatives also states of nature
a two-stage clinical trial is planned for for testing h0 p0.10 versus ha pgt0.10 where p is the proportion of
lowering the price does not decrease this behavior and we should not decide to lower prices based on this research." Comment on the executive's conclusion. What type of inference is being made? Will the decision not to lower prices be a good one.
Use SPSS and generate all necessary summary statistics and figures (e.g. boxplots, histograms and/or scatter plots) to describe the relationship between the workers' mental health
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