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A particular car costs an average of $17,755 in New South Wales. The standard deviation of prices is $650. Suppose a random sample of 30 dealerships in Sydney and Newcastle is taken, and their managers are asked what they charge for this car. What is the probability of getting a sample average cost of less than $17,500? Assume that only 120 dealerships in all of New South Wales sell this car.
P(x) =?
Round all z values to 2 decimal places. Round all intermediate calculations and answer to 4 decimal places.
The tolerance is +/- 0.0001
Quality control engineer has been checking output by almost continuous sampling as abnormal condition began. Determine the probability that in sample of 10 pieces.
consider taking a random sample of size 3 from a population of persons who smoke and recording how many of them if any
Construct a 99% confidence interval for the mean bill of a customer. A) [31.355, 32.645] B) [29.747, 34.253] C) [29.421, 34.579] D) [29,740, 34.260] E) [28.570, 35.570].
Based on this data can the college conclude that the students in the new program performed better than the rest of the class> A one-tailed test is used equalling .05
Construct a less-than-cumulative frequency distribution of the data represented by the graph and calculate the probability that the consultant receives at least 2 calls during any 30 minute period.
Their probabilities for success on a single play are p for A and q for B, and successive plays are independent. Determine the probability that A wins the contest given that A plays first.
Make a his-togram of the distribution of these 31 scores. Does your plot show outliers, clear skewness, or other non- Normal features? Using a calculator, find the mean and standard deviation of these scores.
As a part of their testing program Sony tests samples of 25 batteries. What can you say about the shape of the distribution of sample mean?
A color- blind person is chosen at random. What is the probability of this person being male? Assume that there are an equal number of males and females.
Each year approximately 160 colleges compete in national concrete canoe competion. Each team should design a seaworthy canoe from a substance not known for its capacity to float. T
If Household is selected at random, find out the probability that it feels economic conditions are good?
If sample mean is M=44. Is this sufficient to demonstrate significant effect? Again assume a Two-tailed test with a=0.05.
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