For this year, 55% of millennials will buy a brand new car. If we pick a random sample of 5 millennials, find the probability that at most 4 millennials will buy a brand new car this year?
P(X(less than or equal to 4)
percent rounded to two decimal places = ____%

For this year, 55% of millennials will buy a brand new car. If we pick a...
For next year, 59% of veterans will buy a single-family home. If we pick a random sample of 5 veterans, find the probability that exactly 2 veterans will buy a single-family home next year? P(X = binompdf(,,) Percent rounded to two decimal places P(X ≈ %
a. Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long train. The automatic hopper car loader is set to put 75 tons of coal into each car. The actual weights of coal loaded into each car are normally distributed, with mean μ = 75 tons and standard deviation σ = 1.6 ton. (a) What is the probability that one car chosen at random will have less than...
Suppose that we will randomly select a sample of 72 measurements from a population having a mean equal to 18 and a standard deviation equal to 9. (a) Describe the shape of the sampling distribution of the sample mean. Do we need to make any assumptions about the shape of the population? Why or why not? (b) Find the mean and the standard deviation of the sampling distribution of the sample mean. (Round your σx⎯⎯ answer to 1 decimal place.)...
Suppose that we will randomly select a sample of 109 measurements from a population having a mean equal to 21 and a standard deviation equal to 8. (a) Describe the shape of the sampling distribution of the sample mean . Do we need to make any assumptions about the shape of the population? Why or why not? (b) Find the mean and the standard deviation of the sampling distribution of the sample mean . (Round your σx¯σx¯ answer to 1...
The average cholesterol content of a certain brand of eggs is 224 milligrams, and the standard deviation is 13 milligrams. Assume the variable is normally distributed. If a sample of 21 eggs is randomly selected, find the probability that the mean of the sample will be larger than 221 milligrams. u= milligrams milligrams ? Select an answer PC ? ? Select an answer Select an answer Round each box to two decimal places Now select your normal distribution curve with...
The latest model of a certain brand of electric car is reported to have an average range of 195 miles. An auto industry journalist would like to verify this claim, since she believes that the true range of the car may be less than 195 miles. The journalist selected and tested a random sample of 80 cars of this model and found that the average range of the sample was 190.8 miles with a standard deviation of 31.3 miles. Apply...
A cigarette manufacturer claims that the average nicotine content of their new brand XXX is at most 1.35 mg. It would be unwise to reject the manufacturer's claim without strong contradictory evidence. An appropriate problem formulation is to test A random sample of 100 brand XXX cigarettes are tested and the sample standard deviation and sample mean are found to be 0.07 mg and 1.361 mg, respectively. Assuming the central limit theorem applies and s ≈ σ, find the p-value...
58. You are deciding whether to buy a new or a two-year-old car (of the same make) based on which will have cost you less when you resell it at the end of three years. Your cost consists of two parts: the loss in value of the car and the repairs. A new car costs $20,000 and loses 12% of its value each year. Repairs are $400 the first year and increase by 18% each subsequent year. (a) For a...
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.962 g and a standard deviation of 0.316 g. The company that produces these cigarettes claims that it has now reduced the amount of nicotine. The supporting evidence consists of a sample of 41 cigarettes with a mean nicotine amount of 0.893 g. Assuming that the given mean and standard deviation have NOT changed, find the probability of randomly selecting 41 cigarettes with...
5. Suppose a recent report claims that the average cost of a new car is $34,000. We collect a random sample of new car prices from kellybluebook.com in order to determine whether the actual average cost is less than that. We find the average cost of the cars in our sample is $27,375 The graph below shows 1000 simulated samples from the null distribution when testing whether the average cost is less than $34,000. Shade in the part of the...