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Find the mean and the standard deviation. If we toss a fair coin 100 times, the number of heads is a random variable that is binomial.
(a) Find the mean and the standard deviation of the sample proportion of heads.
(b) Is your answer to part (a) the same as the mean and the standard deviation of the sample count? Explain your answer.
Furthermore, the data shows that 35% of the females who visited his store purchased a cell phone, while 20% of the males who visited his store purchased a cell phone. What is the probability that a female customer will purchase a cell phone?
Using what you know about t-scores, identify which of the variables have a significant influence on the LISTPRICE. At a level of 1% which variables are significant?
When estimating the mean of a population, how large must the sample be in order that the 95% error margin is 1/8 the standard deviation?
test the significance of the correlation coefficient r at a 0.05 for the data below.x values 55 61 70 78 88y values 89
Determine the mean and variance and determine the percentage of data values that fall in each of the following intervals:
A company that manufactures specialty batteries used as auxiliary back- ups for sensitive laboratory equipments in need of constant power sup- plies claims that its new prototype, brand A, has a longer lifetime (un- der constant use) than the indu..
At least half the patients are under 15 years old? First, describe how this can be modelled as a binomial distribution with 8 trials, where success is visitor age is under 15 years old and the probability of success is 20 percent.
You have been put in charge of developing a new game of chance. In this game a person will roll two cubes each having the numbers 1 to 6 on their faces. As a first step in developing the game, what are the possible outcomes and their probabilities?
Criticize the following definitions in light of the eight rules for lexical definitions:- "Schooner" means sort of like a sailboat.
Find the p-value of the test of the hypothesis that mileage is not affected by the additive when the sign test is used;
Statistician has a data set containing n1 = 7 values of a random variable X and n2 = 6values of a random variable Y . She is interested in using the run test to test the equality ofthe distribution functions.
a standard slot machine has three reels. the first reel has 3 walnuts 7 cherries 3 oranges 5 lemons 1 bell and 1
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