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You play two games against the same opponent. The probability you win the first game is 0.4. If you win the first game, the probability you also win the second is 0.2. If you lose the first game, the probability that you win the second is 0.3.
a) Are the two games independent? Explain your answer.
b) What's the probability you lose both games?
c) What's the probability you win both games?
d) Let random variable X be the number of games you win. Find the probability model for X.
e) What are the expected value and standard deviation of X?
Is a body temperature of 99.00F unusual? Why or Why not? d)fifty adults are randomly selected. What is the likelihood that the mean of their body temperatures is 97.98F or lower?
Pelican Stores, a division of National Clothing,is a chain of woman's apparel stores operating throughout the country.The chain recently ran a promotion in which discount coupons were sent to customers of other national clothing stores
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Find the unemployment rate for people with each level of education. How does the unemployment rate change with education? Explain carefully why your results show that level of education and being employed are not independent.
If two voters are randomly selected for a telephone survey, what is the probability that the first one is a Democrat followed by a Republican?
Suppose a simple random sample of size n = 34 is obtained from a population with μ = 30 and σ = 4. Is the sampling distribution of x approximately normal.
About how many of the 100 confidence intervals are likely to cover the true percent?- Is there any way to know which of the polls cover the true percent and which ones don't?
Two servers with lambda 1 & lambda 2 service times exponentially distributed. Pat waits in a line to get served by any of the two servers. What is the waiting time of pat if no one is on the line?
an industrial arts instructor has deisgned a test of mechancical aptitude mecha and having investigated its properties
a student in the concrete lab places 5 low-strength concrete test cylinders 3500 psi with a batch of 8 high-strength
In a school how is ztest used in time table ... one group that studies 7 periods a day of 45 mins each class and the other group can choose semester wise classes and their time period is 90 mins
Calculate the 95% confidence interval for the population proportion of patients who are successfully treated. (c) Write a sentence that correctly interprets this interval.
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