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1. It has been reported that 48% of teenagers play video games on their phones. A random of 60 teenagers is drawn. Find the probability that the proportion of teenagers in the sample who play videos games on their phone is less than 0.489. Write only a number as your answer.
the reading speed of second grade students in large city is approximately normal with a mean on 90 words per minute and
A local hardware store claims that the mean waiting time in line is less than 3.5 minutes. A random sample of 20 customers has a mean of 3.7 minutes with a standard deviation of 0.8 minute. If α = 0.05, test the store's claim.
Make a graph to visualize the problem and state, without doing the calculations, whether the p-value of the test
The time between the successive renewals, for a certain renewal process {N(t),t ≥ 0}, is a continuous random variable whose probability density function is the following:
what is the probability that a random point selected in the interval 04 will be an integer?what is the probability that
Use the traditional square of opposition to find the answers to these problems. When a statement is given as false, simply enter an "F" into the square of opposition and compute (if possible) the other truth values.
Compute cumulative probabilities for these numbers in second column. Then create a histogram illustrating data distribution. Using generated Normal probability table, determine probability of Pr(X
Also, if the standard deviation of all pumps σ is unknown, is there an easier formula to estimate the sample size to control the width of the confidence interval? Please explain it.
hp uses x63 chip in their computers and prices for these chips for last 12 months
1. The National Center for Health Statistics reports the following age breakdown of deaths in the United States during 2006. Source: The New York Times Almanac 2009, p. 392.
in the fall semester of 2011 48.1 of students at uta were women. suppose that two students from uta are selected at
let x be a random variable that represents the amount of a randomly selected monthly cell phone bill. we know that x
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