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a) The access code for a security system consists of five positions. The first position can be any letter 26, while each next position can be a digit from 0 through 9. How many access codes are possible if each digit can be used only once and not repeated, and the first digit must be a four or higher? ( show work)
b) An amateur golfer has 4 nike golf balls, 3 callaway balls, 6 Tritliest balls in his bag befor he stars his round. On the first hole he randomly selects a ball from his bag and hits the ball into a water hazard. As a result, he selects another random ball from his bag and hits a drive into the middle of the fairway. What is the probability that he randomly selected 2 Nike balls to start his round?
Construct a stem and leaf plot of the income. what do you predict about the shape of the population distribution. complete the following sentence. Fifty percent of the data falls below $ ______.
40 were in favor of the Independent candidate, and 140 were undecided. At a 1% level of significance, test to see if the proportion of voters has changed. Calculate the value of the Chi-Square Test Statistic for this problem. What is it?
Of the 500 surveyed, 350 said they would vote for the Democratic incumbent. Using the 0.99 confidence coefficient, what are the confidence limits for the proportion that plan to vote for the Democratic incumbent?
How many more students should be included in the sample to be 99% sure the sample mean x is within $7 of the population mean u for all students at this college?
Before 1918, in a random sample of 11 wolves spotted in the region, what is the probability that 8 or more were male?
What is the probability that a randomly selected cell phone bill is more than $67.75?
If the company's report is correct, what is the probability that the average balance of an account in the sample is $394 or less?
Testing equality of two means - difference in performance of the two gasolines and difference in gasoline mileage output
Is it necessary to know anything about the shape of the distribution of the account balances in order to make an interval estimate of the mean of all the account balances?
Crystal Ball requires the following steps:
A consumer agency has retained an independet testing firm to examine a television manufacturer's claim that its 25-inch console lmodel consumes just 110 watts of electricity.
Suppose that X represents diameter measurements from a gamma distribution with a mean of 3 mm and a variance of 1.5 mm^2.
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