A supplier of heavy construction equipment has found that new customers are normally obtained through customer requests for a sales call and that the probability of a sale of a particular piece of equipment is 0.15 . If the supplier has two pieces of the equipment available for sale, what is the probability that it will take fewer than four customer contacts to clear the inventory? (Round your answer to four decimal places.)

The following data come from a study of the relationship between health risk and income. The number of low income people is 2680, the number of medium income people is 2550, and the number of high income people is 1700. Type the probability that someone in this study is from the low income group or from the medium income group. (Type the probability rounded to two decimal places with no 0; e.g., .34). solve it step by step please

Please help with #80.

A health journal found that 56.3% of college students who lived in coed dormitories consumed alcohol weekly (compared with 26.5% who lived in single-sex dormitories). A random samp of 175 students who live in coed dormitories was selected. Complete parts a through d below. a. What is the probability that more than 50% of the students in the sample consume alcohol weekly? The probability is. (Round to four decimal places as needed.) b. What is the probability that less than 65% of the students in the sample consume alcohol weekly? The probability is. (Round to four decimal places as needed.) c. What impact would changing the sample size to 100 have on the results in part a? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The value of the probability decreases. The new value of the probability is (Round to four decimal places as needed.) O B. The value of the probability increases. The new value of the probability is (Round to four…

The probability that a giving person at a band show buys their album is 20%. The probability that during the week after the show someone who was at the show convince a friend who is not to buy the bands album within a week is 8%. Which is the probability that someone at the show buys an album or that they convince a friend to buy the band album within a week? (hint: your final answer should be a range: from one % to another % do not round off )

Oxnard petri Ltd is buying hurricane insurance for it's off-coast drilling platform. During the next five years, the probability of total loss of only the above-water superstructure ($250 million) is .25, the probability of total loss of the facility ($950 million) is.25, and the probability of no loss is.50. Find the expected loss.( Input the amount as a positive value.) Expected Loss is what?

We will _______ if the test statistic lands in the unlikely region. Group of answer choices A. reject the alternative hypothesis B. fail to reject the null hypothesis C. cannot determine D. reject the null hypothesis and accept the alternative hypothesis

Consider the joint pmf p(x,y) and marginal pmfs p(x) and p(y) for two discrete random variables X and Y as displayed in the table below. X p(x,y) 1 2 3 p(y) 1 0.125 0.0625 0.1875 0.125 0.5 Y 2 0.0625 0.0625 0.125 0.25 0.5 p(x) 0.1875 0.125 0.3125 0.375 1