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Let x denote the time it takes to run a road race. Suppose x is approximately normally distributed with a mean of 190 minutes and a standard deviation of 21 minutes. If one runner is selected at random, what is the probability that this runner will complete this road race in less than 231.58 minutes?
Consider binomial distribution with 14 identical trials, and probability of success of 0.4.
More than 5 percentage points in either direction from what would have been got by interviewing all voters in United States." Determine sample size suggested by this statement.
Construct a scatter plot of P-RFM and P-HELM. If drawing the plot by hand, use graph paper to ensure accuracy.
We are doing a team project for our statistics class and our project is about "Math Anxiety". We are stuck on one question and the questions is "the teams will state the null and alternative hypotheses
The prices (in dollars) for a sample of roundtrip flights from Chicago, Illinois to Cancun, Mexico are listed. Find the mean, median, mode, range, Q1, Q2, variance, and standard deviation of the flight prices.
What is the expected value and variance for the number of contacts in eight attempts?
if i have been approved for a $70,000 loan toward the purchase of a new home at 12% interest. The mortgage is for 30 years. How much are the approximately annual payments of the loan? Hint: Assume you pay yearly.
Plot CEO salaries against the net profit of their respective companies, do you expect to find a linear correlation between the two?
Convert these four officers' scores to standardized z-values.Do you believe there was adequate reason to question these four exam scores? What suppositions are you making?
Write a hypothesis about the length of words in newspapers and magazines, Design and carry out an investigation to test your hypothesis.
The new Lucky Lady Casino wants to increase revenue by providing buses that can transport gamblers from other cities. Research shows that these gamblers tend to be older, they tend to play slot machines only, and they have losses with a mean of $1..
Using the following data, test the question that an equal number of Democrats, Republicans, and Independents voted during the election. Test the hypothesis at the .05 level of significance.
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