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It has been reported that households in the West spend an annual average of $6050 for groceries. Assume a normal distribution with a standard deviation of $1500.
a. What is the probability that a randomly selected Western household spends more than $6350 for groceries?
b. How much money would a Western household have to spend on groceries per year in order to be at the 99th percentile (i.e., only 1% of Western households would spend more on groceries)?
\Write down the general formula for the discrete uniform probability distribution function. Now write down the probability distribution function for the random drawing of tile numbers. Is this a discrete uniform distribution?
An investment counselor would like to meet with 12 of his clients on Monday, but he has time for only 8 appointments. How many different combinations of the clients could be considered for inclusion into his limited schedule for that day?
Demonstrate correct use of descriptive statistics. Demonstrate proficiency in hypothesis testing. Evaluate the results of a statistical analysis.
Explain your answer to someone who is familiar with the t test for a single sample, but not with the t test for independent means.
The Restaurants McBurger says that the waiting time for customers is 3 minutes with a standard deviation of population 1 minute. The quality control department found in a sample of 50 clients that the average waiting time was 2.75 minutes.
Which of the following sets of data provides the clearest diffrence between the two samples?
What is the probability that the first and the last ones on the EP are the relationship songs?
In a clinical study of an allergy drug, 108 of the 203 subjects reported experiencing significant relief from their symptoms. Using a significance level of .01, test the claim that more than half of all those using the drug experienced relief.
A random sample of eight adults aged 30 years were asked how much they spent on medical costs in the year 2011. The following data were measured.
If we have 2 groups with 2 characteristics each, what would our critical value be with an alpha of .025?
The sample size n , the sample means, and the sample standard deviations for the two groups are given below.
Find a probability that a randomly chosen student owns atleast one of the above vehicles. What is the probability that a randomly chosen student does not own a bike.
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