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This year's "Dream of a lifetime" lottery sold 50000 tickets and gave away 5000 prizes including one grand prize. What is the probability that one ticket will win the grand prize?
Whats the answer? and can you explain it please.
For 1989 and 1990 Dave Johnson had the highest decathlon score in the world. When Johnson reached a speed of 32 ft/sec on the pole vault runway, his height above the ground t seconds after leaving the ground was given by h= -16t^2+32t.
In efforts to boost their identity, CherryBerry employs a famous spokesperson to advertise. A survey is then taken to assess the results of the ad campaign. The results show that 17 percent of the 1000 respondents can identify CherryBerry products. H..
Can we conclude at the 5% significance level that the population mean weight of athletic men is lower than the population mean weight of non-athletic men?
let the number of phone calls received by a switchboard during a 5-minute interval be a random variable x with
A company that has a large number of supermarket grocery stores claims that customers who pay by personal checks spend an average of $87 on groceries at these stores with a standard deviation of $22.
There are two ways to run the experiment. The first is to obtain a random sample of 12 drivers, divide them into two groups at random and assign one group to the standard light and the second group to the new light. Suppose the table below represents..
A production process manufacturers alternators. On the average, 1% of the alternators will not perform properly when tested in the plant. When a large shipment of alternators is received at the plant
Families of size 4 spent a population mean of $360 on a visit to an amusement park, standard deviation of $50 in October 2000. Operators want to know whether families will spend more in 2001.
Time spent using e-mail per session is normally distributed, with μ = 8 minutes, and σ = 2 minutes. If you select a random sample of 25 sessions,
For each set of data, calculate mean, median, mode, range, interquartile range, standard deviation, and coefficient of variation.
A fast-food restaurant sells hamburgers and chicken sandwiches. On a typical weekday, the demand for hamburgers is normally distributed with a mean 313 and a standard deviation 57; the demand for chicken sandwiches is normally distributed with a m..
Why does APA recommend that we calculate a measure of effect size in addition to calculating the test statistic?
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