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The FDA is comparing the mean caffeine contents of two brands of cola. Independent random samples of 6-oz. soda cans of each brand were selected and the caffeine content of each soda can was determined. The study provided the following summary information.
the fda is comparing the mean caffeine contents of two brands of cola. independent random samples of 6-oz. soda cans of
let x represent the absolute value of the difference between the number of heads and the number of tails when a coin is
in a study to estimate the proportion of residents in a city that support the construction of a new bypass road in the
the time in hours for a worker to repair an electrical instrument is a normally distributed random variable with a mean
a political strategist calims that 55 of voters in madison county support his candidate. in a poll of 200 randomly
in a survey of undergraduate library usage it was found that 76 of seniors 59 of juniors 50 of sophomores and 28 of
in a tire factor the quality control inspector examines a randomly chosen sample of 16 tires. when more than one
at lido and frank mini food customers spend an average of 25 minutes selecting their groceries. the check out time
suppose a penny arcade worker is in charge of keeping ten machines in operation. the failure rate of each machine
appliance alley sells super clean washing machine. demand for super machine averages 65 units per month. super clean
The odds in favor of an event are the number of successes divided by the number of failures. The probability of this event occurring is the number of successes divided by the sum of the number of successes and the number of failures.
what is the central limit theorem? according to the central limit theorem the expected value for a sample mean is as
She wants to be 95% confident that her estimate is correct. If the standard deviation is $1050, how large a sample is needed to be accurate within $200?
a contractor purchases a bulldozer for 36500. the bulldozer requires an average expenditure of 5.25 per hour for fuel
a student encounters an animal embryo at the eight-cell stage. the four smaller cells that comprise one hemisphere of
question calculate sp the sum of products of deviations for the following scores. note both means are decimal values
The university police department must write, on average, five tickets per day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows Poisson distribution with a mean of 9 tickets per day.
Welcome a woman taking the initiative in asking for a date. What is the probability that seven (7) of the men say NO.
A random sample of 90 voters found that 38% were going to vote for a certain candidate. Find the 99% limit for the population proportion of voters who will vote for that candidate.
Identify the null hypothesis, alternative hypothesis, test statistic, p-value or critical value, and the conclusion about the null hypothesis. Use the P-value method.
Explain the difference between testing a single mean and testing the difference between two means. What two assumptions must be met when one is using z test to test differences between two means?
Determine a 99% confidence interval for mean pH in rainfall. How would you distinguish interval?
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