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The human resources department of a large investment bank announced that the number of people it interviews monthly has a mean of 105, with a standard deviation of 17. The management of the bank suspects that the standard deviation exceeds 17. Suppose that the management wants to take a small sample of months and carry out a hypothesis test to see if its suspicions have support. State the null hypothesis and the alternative hypothesis that it would use for this test.
a. Compute the mean and standard deviation of x. b. Compute the mean and standard deviation of y. c. Compute the mean and variance of the total amount of money collected in tolls from cars.
If two gloves are randomly selected from the box without replacement, what is the probability that both gloves selected will be right handed.
For the passengers in the SRS, what is the approximate probability that the mean length of time for them to get through security will be less than 18 minutes?
Describe a real-life situation where Pascal's Triangle can be used to calculate probability. Is this the best method for solving your calculation?
show that in mlreg multiple linear regression the residual vector e is orthogonal to both the design matrix x and the
A knew which of his fellow prisoners were to be set free, then his own probability of being executed would rise from 1/3 to ½ because he would then be one of two prisoners. What do you think of the jailer's reasoning?
If random samples of 36 download times are selected, what is the probability that the sample mean will be less than 0.84 seconds?
let x1...xn1 be an iid sample from nu1o2 and let y1...yn2 be an iid sample from nu2o2 where parameters u1u2 and o2 are
Below are two data sets. Using descriptive statistics, discuss the two data sets in relation to each other. Both data sets come from an operation where potato chips are being placed in small connivance store bags that are to hold 6.0 oz.
a researcher wants to prove that there is a difference in the average life spans between men and women in japan. let
an incomplete frequency disribution is given below class intervals frequency 0-10 4 10-20 16 20-30 ---- 30-40 ----
find the indicated probabilities using the geometric distribution or poison distrubution. then determine if the events
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