Consecutive triangular numbers
Use inductive reasoning to answer. If you add two consecutive triangular numbers, what kind of figurate number do you get?
A. a pentagonal number
B. a hexagonal number
C. the next traingular number
D. a square number
Expected delivery within 24 Hours
What is the probability of having a length of gestation less than or equal to 36 weeks given that an infant is low birth weight? This is from Fundamental of Biostatistics 7th Edition. Problem 3.50 on page 62. Textbook says it should be 0.541, but
What differentiates ratio data from data that are only interval?
The following paired samples have been obtained from normally distributed populations. Construct a 90% confidence interval estimate for the mean paired difference between the two population means.
For the final days before the election, the campaign manager has a total of $34,000 to spend on TV and radio campaign advertisements. Each TV ad costs $3000 and is seen by 10,000 voters, while each radio ad costs $500 and is heard by 2000 voters.
A test for breast cancer correctly classifies 95% of malignant tumours as malignant but also incorrectly classifies 1% of benign tumours as malignant. It is thought that approximately 5% of samples submitted for this test are taken from malignant
Describe the sampling distribution of y-bar, the sample mean. (Be sure to include the name of the distribution and the 2 parameters that describe the distribution.)
Find & interpret the probability that exactly 8 of them started smoking before 21 years of age. Find & interpret the probability that fewer than 8 of them started smoking before 21 years of age.
What is the range width of the actual number of people present at the Station at any given moment? (For concreteness, assume the fluctuations do not exceed one sigma.)
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