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An electronics store has received a shipment of 25 table radios that have connections for an iPod or iPhone. Ten of these have two slots (so they can accommodate both devices), and the other fifteen have a single slot. Suppose that eight of the 25 radios are randomly selected to be stored under a shelf where the radios are displayed, and the remaining ones are placed in a storeroom. Let X = the number among the radios stored under the display shelf that have two slots.(b) Compute
P(X = 2), P(X ? 2), and P(X ? 2).
(Round your answers to four decimal places.)
The historical reports from two major networks showed that the mean number of commercials aired during prime time was equal for both networks last year.
a company produces bolts for large-scale construction projects. the shear strength x of the bolts is assumed to be a
What is the probability Linda Lahey, company president, received exactly 1 email between 4 P.M. and 5 P.M. yesterday? What is the probability she received 5 or more email during the same period?
Houston is $19,900 and in Los Angelos is $21,800. What is the probability that a brand manager in Houston has a base salary in excess of $100,000?
Find out the expected number of correct responses under these circumstances if one in fact selects the responses at random. What is the standard deviation?
suppose two random variables x and y are independent with x n24 and y n03. w x-y2a. find the distribution of w.b.
She then selects a sample of 102 football players and finds that their average math SAT is 460. Use alpha =.01 to perform the appropriate hypothesis test.
Which of the following survey questions will deliver an unbiased response? Should the city ban smoking in restaurants to protect our children from second hand smoke?
Assume that a simple random sample of a population has been selected from a population that has a normal distribution, Use the formula for X2( chi square distribution) and the chi-square distribution table
The number of gallons (measured in thousands of gallons) that this gas station sells per week. If Y = 340 - 90X, what is the expected value of the random variable Y?
twenty-two volunteers at a cold research institute caught a cold after having been exposed to various cold viruses. a
How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters? We want 98% confidence that the sample mean is within 2 minutes of the population mean.
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