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Consider a family with 4 children, and assume that each child has probability 0.51 of being a boy. Find the conditional probability that all the children will be boys, given that (i) the eldest child is a boy, (ii) at least 1 of the children is a boy.
Suppose that pulse rates among healthy adults are normally with a mean of 80 beats/second and a standard deviation of8 beats/second. What proportion of healthy adults have pulse rates that are at most 72 beats/sec? Round your answer to at least fo..
If the code does not start with a vowel, then there must be 2 consecutive positions in the code which contain the same vowel. (For instance, both baal and blaa are acceptable codes.)
The probability of success for any trial of a binomial experiment is 25%. Find the probability that the proportion of successes in a sample of 500 is less that 22%. Repeat with a sample of 800. Repeat with a sample of 1,000.
Give a 95% confidence interval for the average sale (in dollars) per customer for the entire level over the period of the postholiday sale.
an insurance company knows that in the entire population of millions of homeowners the mean annual loss from fire is
Group contiguous subareas in pairs so that there are 15 or more zones; calculate the mean and variance for the variable of interest across.
Suppose the supplier is actually sending Ziteck 10% defects. What is the probability that the sample will lead Ziteck to accept the shipment anyway?
a motor bike battery manufacturer found that the life of their batteries is normally distributed with a mean life span
The average time to complete a particular task is stated to be 150 seconds. Which of the following 95% two-sided confidence intervals on the true average time to complete the task rejects this claim?
assume that a simple random sample has been selected from a normally distributed population and test the given claim.
Speeding on the I-5, Part II. Exercise 3.12 states that the distribution of speeds of cars traveling on the Interstate
The number of vacation days taken by employees of a company is normally distributed with a mean of 14 days and a standard deviation of 3 days. For the next employee, what is the probability that the number of days of vacation taken is less than..
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