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A clothing store assert that 60% of its customers pay by credits. On a particular day 35 customers purchased items at the store. what is the probability that 30 or more paid by credits?
A sample of 10 printed labels is selected from a process that is 15% nonconforming. What is the probability of 2 nonconforming labels in the sample? Use the Poisson distribution. Show your work.
Using the normal distribution as an approximation to the binomial, find the probability that, in a random sample of 360 golf tees, 65 or less are nonconforming. Show your work.
Find the probability, using the binomial distribution, of obtaining 4 or more nonconforming units when sampling 30 computers from a batch known to be 10% nonconforming. Show your work.
A finite lot of 40 digital watches includes 30% nonconforming units. Using the hypergeometric distribution, what is the probability that a sample of 6 will contain 3 nonconforming watches? Show you
Suppose that a pair of 14-sided dice are rolled (the sides are numbered 1-14 and yes, these do actually exist). What is the probability that the sum of the dice is 17?
Assuming the life length of this type of lightbulb is normally distributed, if you wish to conduct this test using a .05 level of significance, what is the critical value that you should use?
Assuming that the systolic blood pressures of deep sea divers are normally distributed, if the doctor wanted to test her research hypothesis at the .01 level of significance, what is the critical va
The ABC battery company claims that their batteries last at least 100 hours, on average. Assuming the life length of batteries is normally distributed, what is the p-value associated with this test?
Compute the test value that you would use in conducting this test. Place your answer, rounded to 3 decimal places, in the blank.
Results from previous studies showed 79% of all high school seniors from a certain city plan to attend college after graduation. What is the p-value associated with your test of hypothesis?
A lab technician is tested for her consistency by taking multiple measurements of cholesterol levels from the same blood sample. State the null and alternative hypotheses.
Does this provide enough evidence to reject the claim that the lab technician's accuracy is within the target accuracy? Compute the value of the appropriate test statistic.
Random samples of size 50 are selected.Referring to the information, the average of all the sample proportions of customers who will make a purchase after visiting the web site is _________?
If 38% of the factory's scooters come off of assembly line A and 34% come off of assembly line B. what is the probability that a randomly selected scooter passed inspection?
An average price of $17.50 with a sample standard deviation of $3.85. Find the 95% confidence interval for µ, the population mean price of all mathematics dictionaries.
If you assume that the population mean is 650, find the P-value corresponding to the hypothesis that the average SAT score is less than 650 (i.e. left-tail test).
Determine the joint probability mass function. Are X and Y independent random variables? Also, find: E(X); E(Y); V(X); and V(Y). If W = 2X + 3Y, find E(W) and V(W).
A university has taken test A and scored 910 and another student has taken test B and scored 33, compare these students score using Z-values. Which one has a higher relative score?
Two other cards of the same denomination(of course,different from the first denomination).How many hands of full house are possible?
Buy only one lottery ticket of this number combination in each draw for the next 100 draws. What is the probability that you win the top prize at least once in the next 100 draws?
A certain tennis player makes a successful first serve 75% of the time. Assume that each serve is independent of the others. If she serves 5 times, what's the probability she gets?
Perform exploratory data analysis on CreativityPre and CreativityPost. Using SPSS, calculate the mean and standard deviation of these two variables.
If the second child refuses to use red pencils and the third child refuses to use blue pencils, then how many ways are there for the children to choose pencils?
The quarterly returns for a group of 69 mutual funds with a mean of 2.3% and a standard deviation of 5.9% can be modeled by a normal model. Based on the model N(0.023, 0.059), what are the cut off v