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A random sample of 15 people is selected and the waiting times are collected and stored in Bank1. These data are:
4.21 5.55 3.02 5.13 4.77 2.34 3.54 3.20
4.50 6.10 0.38 5.12 6.46 6.19 3.79
Suppose that another branch, located in a residential area, is also concerned with the noon-to-1 p.m. lunch period. A random sample of 15 people is selected and the waiting times are collected and stored in Bank2. These data are:
9.66 5.90 8.02 5.79 8.73 3.82 8.01 8.35
10.49 6.68 5.64 4.08 6.17 9.91 5.47
Ccompute a t-test comparing males' and females' heights. You must determine which type of t-test to compute. Write a short interpretation of the results.
According to BusinessWeek, many Japanese consider their cell phones toys rather than tools. If a random sample of 200 Japanese cell phone owners reveals.
question 1 a persons blood glucose level and diabetes are closely related. let x be a random variable measured in
In the following statements, determine what parts of each statement are features, advantages, or benefits.
A poll on a proposition showed that we are 95% confident that the population proportion of voters supporting it is between 40% and 48%.
collect cumulative data for all u.s. major carriers for the time period of january 2006 through december 2012. the data
An employee of a bank wants to test the null hypothesis that on the average the bank cashes 10 bad checks per day against the alternative that this figure is too small.
Using this percentage and random digits, make a frequency table of the longest run of heads in a sequence of 200 attempts. After following the player for 200 field goal attempts, do you see any evidence of an unusually long streak?
In a state lottery game, anyone who picks 6 numbers out of 36 wins $50,000, no matter how many people correctly guessed the winning numbers. What are the odds of winning in this game?
(a) What proportion of the packages are underweight? (b) to what value must the mean # be raised in order that only 1/10 of 1 % of the packages be underweight?
What is the probability that you draw a red dun on the first draw, don't put the red dun back, and then draw either a red dun or a bay on the second draw?
When we have a random sample from a population, we use the t distribution when the sample size is small and the normal distribution.
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