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You are sending out 60 invitations to a party.each person can bring a guest if they wish. Suppose it's equal probable that the invitee does not show up,shows up alone, or with a guest. What is the
A division within a transportation company is responsible for performing maintenance on the fleet of trucks used by the company. Trucks in need of repair arrive to the maintenance division according
A publisher wants to estimate the mean length of time (in minutes) all adults spend reading newspapers. To determine this estimate, the publisher takes a random sample of 15 people and obtains the r
A coin is known to be either fair corresponding to the null hypothesis H_0: p=1/2 or has heads on both sides corresponding to the alternative H_1: p = 1. We toss 4 times and decide to reject H_0 if
You decide that a confidence level of 99% is more appropriate than the 95% level used. What are the limits of the 99% interval?
A coin is known to be either fair corresponding I the null hypotheses: H0: p=1/2 or has heads on both sides corresponding to the alternative'H1: p=1. We toss a coin 4 times and reject H0 if all 4 t
Annual maximum wind speed gusts have been modeled as both a Type I (Gumbel) and Type II largest extreme value. If the average maximum wind gust is 60 mph and the standard deviation is 12 mph, what i
It is known that 81% of all new products introduced in grocery stores fail (are taken off the market) within 2 years. If a grocery store chain introduces 61 new products, find the following probabil
It is estimated that 3.6% of the general population will live past their 90th birthday. In a graduating class of 733 high school seniors, find the following probabilities. (Round your answers to fou
A local environmental organization is interested determining if the proportion of red cars in a city has increased from last years value of 10% to a value closer to 15%. A sample of 400 cars were t
Ocean fishing for billfish is very popular in the Cozumel region of Mexico. In the Cozumel region about 45% of strikes (while trolling) resulted in a catch. Suppose that on a given day a fleet of fi
A local environmental organization is interested in determining if the proportion of SUVs un SB has increased from the last years value of 10% to an alternative value closer to 15%. A saample of 400
The test scores of a class consisting of 30 students are given in the table below. Perform the chi-square and the K-S tests on the data. Can the underlying distribution of the test score be
A survey from Teenage Research Unlimited found that 30% of teenage consumers receive their spending money from part-time jobs. If five teenagers are selected at random, find the probability that at
1) You are sending out 60 invitations to a party.each person can bring a guest if they wish. Suppose it's equal probable that the invitee does not show up,shows up alone, or with a guest. (A) What
Slot machines have three drums with the same number of positions on each drum. Each position contains a symbol. When you pull the lever on the machine, the drums spin.
What is the expected number of guests that might turn up at your party, and its standard deviation? What ishe probability the number of guests is between 70 and 80?
College students average 8.6 hours of sleep per night with a standard deviation of 35 minutes. If the amount of sleep is normally distributed, what proportion of college students sleep for more than
Suppose that the lengths of the slots are normally distributed with a mean of 1002.5 mm and a standard deviation of .4 mm. What proportion of the time wil lfour randomly selected components be able
Suppose that you are trying to estimate average IQ and its standard deviation. You know that IQs are distributed normally, and so you choose 6 random people and test their IQs. You obtain the values
How is the t-test for correlated groups and the t-test for single samples similar and dissimilar?
Let X1 and X2 be observations of a random sample size of n=2 from a distribution with p.m.f. F(x)= x/6, x=1,2,3. Then find the p.m.f. of Y= X1+ X2. Determine the mean and the variance of the sum in
In the past the standard deviation of weights of certain 32.0-oz packages filled by a machine was 0.25 oz. A random sample of 20 packages showed a standard deviation of 0.35 oz. Is the apparent incr
Suppose we obtained data on vein size after application of a nitroglycerin ointment in a sample of 50 patients. The mean vein size is found to be 7.8mm with an SD of 2.1.