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along a stretch of highway the posted speed limit is 80 kmh however not everyone obeys the posted speed limit the
a frequency curve is constructed from the test scores of 200 students sixty percent of the total area under the curve
are all good samples random this is an opportunity to bring up opinion polling which typically tries to obtain views
state the null and alternative hypotheses for a hypothesis test indicate whether the hypothesis test will be
use z-scores to make the following comparisonassume that male and female heights are normally distributed and that the
a study was conducted in 2010 examining the relationship between alcohol and spousal violence using a sample of male
a motel has 15 bedrooms from past experience the manager knows that on the average 20 of the people who make room
alternate and null hypothesis and would the null be retained in the situation lucy wants to know her fourth grade
the total cholesterol levels of a sample of men aged35-44are normally distributed with a mean of 220 milligrams per
empirical rule 68-95-997the interest rate for the financing of a used car is on average 9 with a standard deviation of
the probability that a blood donor has type a blood is 040consider 8 randomly chosen blood donors what is the
empirical evidence shows that the normal resting adult body temperature is normally distributed with a mean of 982
a commodities speculator feels that the probabilities are 035 030 025 and 010 that the price of wheat per bushel will
on a particular night a baseball stadium sells 60 of its seats and those 15 do not end up showing up to the game
the daily demand for rice is with mean of 2100 kg standard deviation 200kg available product is 1800kgq1 what is the
gerald took the act and scored a 27 on the math portionnbspthe act had a mean math score of 21 with a standard
the length of a human pregnancy with no complications from conception to birth varies according to a normal
at a particular hospital 40 of staff are nurse assistants if 12 staff members are randomly selected what is the
in a study using 10 samples and in which the population variance is known the distribution that should be used to
in a standard normal distribution what z value corresponds to 20 of the data between the mean and the z value to the
one study based on responses from 1025 randomly selected teenagers concluded that 39 of teenagers cite grades as their
suppose there are 25 samples obtained at equally spaced time points and n5 observations in each sample what is the
in a survey of 2802 adults 1448 say they have started paying bills online in the last year construct a 99 confidence
a vending machine dispenses coffee into an eight-ounce cup the amount of coffee dispensed into the cup is normally