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the mean weight for a certain type of fish is known tow be 28.0 ounces with a standard deviation of 2.5 ounces. a qame warden catches and weighs 30 fish from a certain pond to check if they are significantly larger than the mean stated above. if the mean of the sample larger population of this fish?use either L=1% or L=5%.
Is the school district correct in assuming the girls are equal in performance to boys. They are 95% sure their assumption is correct.
Assume that the number of Telephone calls arriving in an office during a 15minute period has a Poisson distribution with mean number of calls equal 5.
How many cans of paint should the sample contain if the researcher wants to be 98% certain of being within one percentage point of the true proportion of this chemical?
Describe what is measured by the estimated standard error in the bottom of the independent-measures t statistics.
The U.S. Bureau of Prisons publishes data in Statistics Report on the times served by prisoners released from federal institutions for the first time.
SAT verbal scores are normally distributed with a mean of 412 and a standard deviation of 90. Use the Empirical Rule to determine what percent of the scores lie between 412 and 592.
If 60 percent of those people chewing the gum are successful in stopping smoking, what is the probability that in a group of four smokers using the gum at least one quits smoking?
How could your answer to part (A) change if you knew returns followed a skewed distribution instead of a normal distribution? Explain.
Jars have exactly the same number of red, orange, yellow, green, blue, and violet jelly beans. What is the maximum number of jars the factory can produce?
Vote in favor of ABC in the elections. Derive a 95 % confi dence interval for the mean proportion of voters in Sile who will vote for ABC in the coming elections.
Commute times: three random samples of time in minutes that commuters are stuck in traffic are shown. At anova =0.05, is there a difference in the mean times among the three cities?
A random sample has been taken from a normal distribution and the following confidence intervals constructed using the same data: (38.02, 61.98) and (39.95, 60.05). What is the value of the sample mean?
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