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General Discrete Random Variable Suppose uppose the grading for a course project can only have 6 possible outcomes; 100, 90, 80, 70, 60, 50, and 0. Let the random variable X be the scores on the project. Suppose X has the following distribution: x 100 90 80 70 60 50 0 P(X=x) 0.05 0.35 0.3 0.1 0.1 0.08 0.02 a. What is the probability that X is AT MOST 70? b. What is the probability that X is AT LEAST 80%? c. What is the probability that X is MORE than 80? d. What is the probability that X is LESS than 70? e. Compute the expected value for this random variable (see page 269 of text).
Using excel, construct a 90% confidence interval for the proportion of musicians who began playing while in elementary school.
Findout the normal model for the given proportions. The professor has every student toss a coin 50 times also calculated the proportion
You are curious about whether the professors and students at your school are of different political persuasions, so you take a sample of 20 professors and 20 students drawn randomly from each population.
Costs of Television: Listed below are prices (in dollars) and quality rating scores of rear-projection televisions. All of the televisions have screen sizes of 55 or 56 inches.
If you increase in the equation, would it move the graph upward? Express your answer in terms of time, initial position, initial velocity, and acceleration.
Using your own experience, estimate the probability the local weather forecast is correct. Explain the rationale behind your estimate.
What sample size would be needed for the estimate to be within 1.5 percentage points with 90% confidence if you do not have a prior estimate?
Determine the point estimate and 95% confidence interval for the mean family dental expenses of all employees of the company.
Assume that the standard deviation of college student IQ's is 10. A random sample of 100 students from a college showed an average IQ of 110. Compute a 95% confidence interval for the mean IQ of students attending this college.
A deck of cards contains 52 cards, 13 in each of four suits (hearts, diamonds, clubs and spades). Suppose you have been dealt five cards without replacement from a randomly shuffled deck of cards. Find the probability that al five cards are hearts..
Produced weigh between 100 grams up to the mean and 49.18% weigh from the mean up to 190 grams. Determine the mean and the standard deviation.
Suppose the true population proportion is 68%. What is the probability of observing a sample proportion 64% or smaller.
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