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Spinning the wheel
A wheel comes up green 50% of the time and red 50% of the time. If it comes up green, you win $100. If it comes up red, you win nothing.
a) Intuitively, how much do you expect to win on one spin, on average?
b) Calculate the expected value of the game.
What is the difference between the mean of the two groups? What is the difference in the standard deviation?
What is the probability that a given (i.e. one) textbook weighs more than 5.5 pounds? Imagine the distribution of all possible samples averages of textbook weights (with n=16). What is the weight that separates the lightest 25% of sample averages f..
Consider a bivariate data set and imagine that the data are projected onto the x-axis and then checks for outliers are made using the MADmedian rule. The same is done when projecting the data onto the y-axis and both times no outliers are found. ..
Can we conclude a difference in means? YES or NO (circle one)
Table shows the number of passengers responding to the survey and the number that consider the service as either outstanding or good. Construct an appropriate control chart and comment on the service level of the airline.
For a set of 8 data points, the sum of the squared differences between observed and estimated values of y is 34.72. Given this information, what is the standard error of estimate?
Describe a sampling strategy to randomly select those to be searched.- Here is the first-class passenger list and a set of random digits. Select two passengers to be searched, carefully demonstrating your process.
Construct a relative frequency histogram, a cumulative frequency histogram, a relative frequency (%) histogram, a cumulative relative frequency (%) his- togram, a frequency polygon, and a relative frequency polygon. Describe the shapes of these gr..
a sample of 15 teachers from rhode island has an average salary of 35270 with a standard deviation of 3256. as ample of
Verify that the significance level associated with the main effect for factor A is less than .001 but that you get a highly non-significant result for factor B and the hypothesis of no interaction.
Suppose that the chance of rain tomorrow is 60%. What is the probability that John will practice his piano lesson?
Check the validity of the concern by determining a 95% confidence interval for the standard deviation of all drinks dispensed by this machine.
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