A Kindergarten teacher observes that 65% of her students arrive in her class knowing the alphabet letters. If she takes a random sample of 17 students, what is the probability that
10 will know their alphabet?

25 ! the line of best fit is h = 5a + 86. predict the height at age 16.

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?