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The Mars twin rovers, Spirit and Opportunity, which roamed the surface of Mars in the winter of 2004, found evidence that there was once water on Mars, raising the possibility that there was once life on the plant. Do you think that the United States should pursue a program to send humans to Mars? An opinion poll3 indicated that 49% of the 1093 adults surveyed think that we should pursue such a program.
a. Estimate the proportion of all Americans who think that the United States should pursue a program to send humans to Mars. Find a bound on the error of estimation.
b. The poll actually asked several questions. If we wanted to report an error of estimation that would be valid for all of the questions on the poll, what value should we use?
In a recent poll, 126 people were asked if they liked dogs, and 6% said they did. Find the margin of error of this poll, at the 90% confidence level.
For these 4 questions below what would be the independent and dependent variables, the level of measurement and whether or not the variable is discrete or continuous.
The correlation between hours spent in the course and exam grades is .8. what percent f variation in exam grades can be explained by hours spent in the course?
an urn contains three red balls and four black ones. the two balls are drawn at random without replacement. the random
a random sample of 15 accounting graduates indicated on average they had taken 139 credit units with a standard
what determines the width of bars in a histogram?a. the apparent of limits of a score or intervalb. the real limits of
during each day the probability that your computers operating system crashes at least once is 5 independent of every
the u.s. national average door-to-doctor wait time for patients to see a doctor is now 21.3 minutes. suppose such wait
Compute the average time between calls and compare this value with the expectedvalue of the time between calls from the probability distribution.Why are the resultsdifferent?
The daily quantity demanded of unleaded gasoline in a regional market can be represented as Q = 100 - l Op + E, where p E [O, 8], and E is a random variable having a probability density given by f( e) = .025/1-20,201 (e) Quantity demanded, Q, ..
P dollars is invested at annual interest rate r for 1 year. If the interest is compounded semiannualy, then the polynomial P(1+r/2)^2 represents the value of the investment after 1 year.
q1. explain the difference between multiple independent variables and multiple levels of independent variables. which
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