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Consider an x-bar chart where the x-bar statistic is normally distributed and an associated x-bar control chart exists. If the process is in statistical control then what is the type 1 error rate of
Correlation measures the strength of the (positive/negative/linear/amount of) relationship between two (categorical/continuous/mixed) variables.
A commuter train from Long Island to New York City is scheduled to arrive at 8:07 AM every weekday morning. The probability that the train arrives on time is 0.90. Suppose 20 weekdays are randomly s
If the lie detector test tells the expert that the person is truthful, what is the probability that the person is a liar? If the test indicates that the person is a liar, what is the probability that
In a recent study it was reported that 22% of those who had depression went on to develop dementia, compared to only 17% of those who did not have depression. Suppose 10% of all people suffer from
Suppose that when certain geological conditions exist, there is a 20% chance of striking oil. A drilling company finds five independent locations where these geological conditions exist and drills o
What proportion of predictions were for unusually high increases? What proportion of outcomes were for unusually high increases?
A bank classifies borrowers as "high risk" or "low risk," and 15% of ots loans are made to those in the "high risk" category. Of all its loans, 5% are in default and 40% of those in default are to h
Suppose the reaction temperature X (in °C) in a certain chemical process has a uniform distribution with A = -8 and B = 8
If it is stipulated that an equal number of men and women are to be selected (6 men from the group of 65 men and 6 women from the group of 35 women), what is the probability that Mary's name will be
A fast food center wishes to estimate the proportion of people in its city that will buy its products. Suppose the true proportion is 0.05. If 394 people are sampled, what is the probability that th
Supposed 57% of the registered voters in a country are Republican. If a sample of 722 voters is selected, what is the probability that the sample proportion of Republicans will be less than 61%?
In a sample of 108 toddlers, the average height was found to be 36.5 inches with a standard deviation of 1.1. Give a point estimate for the population standard deviation of the heights of toddlers.
What is the probability that the coin will land heads on the second toss, given that heads were thrown on the first toss? What is the probability that the coin will land tails on the third toss, given
A fair coin is tossed 8 times. What is the probability that the sequence HTTT occurs at least once in the 8 tosses?
In order to improve the signal transmitted reliablity, the signal to be transmitted will be sent five independent times to the reciever. The reciever will then interpret the signal to be a 1 if he/
Build a 90% confidence interval for the population standard deviation for all cans that come off the assembly line.
There is a 57% chance of failing a course w/ out a tutor and a 27% chance w/ a tutor. The chance of finding a tutor is 67%.? What is the probability that Christine fails the course? (Round your answer
Perform the appropriate post hoc comparisons. What do you conclude about this relationship? (e) What is the effect size in this study, and what does this tell you about the influence of the independ
A street has 30 street lights in a row. If 8 of the street lights are damage and you are going to replace them and don't know which of the lights are damage. What is the probability that you chosen
The ball is replaced in the urn along with another ball of the same color. A second ball is then drawn from the urn. Given that the second ball drawn is white, what is the probability that the first
Sampling plan for a movie promotion. Advertising companies often try to characterize the average user of a client's product so ads can be targeted at particular segments of the buying community.
An instructor computed a least squares regression line to predict final course percentage based on Exam 1. She got the following formula: yhat=34.28+0.5897x. Suppose that a student who made a grade