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The salespeople at Quality Motor Bikes sell up to 5 bikes a month. The probability distribution is as follows in the table below. What is the expected number of bikes sold during a month? Sales Probability .02 .40 .30 .15 .08 .05
Suppose that 15% of the population is left-handed. If 20 people are selected at random, find the probability that exactly 4 of them are left-handed.
A random sample of 50 households revealed a mean of $112,000 and a standard deviation of $40,000. What is the standard error of the mean?
it is your birthday and you are waiting for someone to write you a birthday message on facebook. on average on your
Thirty-five sophomores, 37 juniors and 37 seniors are randomly selected from 247 sophomores, 413 juniors and 348 seniors at a certain high school. What sampling technique is used?
q1. the width of a confidence interval will bea. narrower for 95 confidence than 99 confidenceb. wider for a sample
for an f-ratio with df 2 10 the critical value for a hypothesis test using a .05 would be . explain your
Moving average oscillators are often used to determine when to buy and sell (or sell short) securities. They also can be used to help signal trends in the underlying data.
A cyclist traveled at a rate of 32 mph to visit a nearby town. The cyclist averaged 10 mph on the return trip. If the round trip took 6.3 hours, find the distance to the nearby town.
How many Corolla buyers must be surveyed if we want to be 95% confident that the sample percentage is within four percentage points of the true percent all Corolla buyers?
What is the population mean? What is the best estimate of that value?
A sample of 81 observations is selected from a normal population with a standard deviation of 5. The sample mean is 40. Determine the 95% confidence interval for the population mean.
a basketball player has made 44.1 of the 3 pointers he has attempted. suppose he attempts 20 3-point goals for the
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