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A mean of 6 minutes and a standard deviation of 1.24 minutes. What cutoff values would seperate the 16% that take the least time to process?
Provide a different example for each of the following types of variables from your work or home life:
Suppose 45 shoppers are interviewd. What is the probability that no more than 28% of shoopers say they are likely to purchase the bags?
Determine if this statistical study is descriptive or inferential: A study finds that the median household income in the US has declined over the last two years.
They select a random sample of 200 people to estimate the percentage of who owns their home. What is the percentage that at least 140 people own their home?
The following question was put on a questionnaire. What was your last salary? What type of data is being requested?
The joint probability function of two random discrete variables X and Y, with natural values (not negative) included zero, is equal to f(x,y) = c (2x +y) if x ε {0, 1, 2} and if y ε
What is the relationship between the Confidence Level and Type I Error?
If a dealer has sold 200 of these cars, what is the approximate probability that it will need to service at most 50 of them?
We know that in one hour the probability of entering 15 clients is 0,031 and in the same period the probability of entering 16 clients is 0,062. Now, calculate the mean of clients entrance in the b
Qestion: Consider the random variable X. Prove that V(X) = E(X2) - E2 (X) [V (X) is the variance of X].
Let X be a random variable with density function Compute P (0.5 < X < 1). Compute F (x) for all x > 0. Find b such that P (X < b) = 0.90.
A researcher is interested in the relationship between fathers' performance in high school and their children's social skills. She obtains the high school transcripts of fathers and records th
Calculate the value of P(X = 2) and P(X <= 5 | X >= 2) [P -> probability]. Calculate the probability function and the probability distribution of X.
Consider throwing 2 usual dice. In each play, we observe the number of dots that stay on top, sum the returned result and to that sum, we apply the rule of casting out nines.
In bernoulli trials (p) let Vn be the number of trials required to produce either n successes or n failures whichever comes first. find the distribution of Vn.
The following results are for two independent samples taken from two populations. What is the value of the test statistic?
The time it takes a ski patroller to respond to an accident call has an exponential distribution with an average response time of 5 minutes. As part of ski patrollers' commitment to prevent an accid
What is the probability of randomly drawing a score that falls between 78 and 90? What is the probability of randomly drawing a sample (n=16) with a mean of less than 82?
Do these data suggest a statistically significant difference between the proportions of drug-resistant cases in the two states? Use a .02 level of significance. Whatis the p-value, and what is your
Construct the probabilty distribution for this experiment where the random variable x denotes the total number of heads observed on the three coins. what is the expected value of x?
Use exponential smoothing with α = .2 and the smoothed forecast for July is 32. Determine the smoothed forecast for August.
In random sampling, each item or element of the population has an equal chance of being chosen at each draw. A sample is random if the method for obtaining the sample meets the criterion of randomne
Sample A: 59 30 74 62 87 73 Sample B: 53 67 85 57 93 79 Use a two-tailed t-test of independent samples for the above hypothesis and data. What is the p-value?
Based on past experience, they believe that they have a 0.7 probability of getting the first contract, a 0.4 probability of getting the second, and a 0.8 probability of getting as least one of the t