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1. Describe the patterns displayed by the individual sampling distributions. Then describe how the pattern changes as the sample size increases. In particular, where do the dot plots appear to center? What do you think is the true proportion of red beads in the box?
2. Calculate the variance for the sample proportions recorded in each dot plot.
95% of breaking strengths will be contained between what two values symmetrically distributed around mean?
1.experiments on learning in animals sometimes measure how long a laboratory rat takes to find its way through a maze.
from the data bank select a random sample of 30 individuals. a. use the z test to test the hypothesis for iq that h0
on one busy holiday weekend a national airline has many requests for a standby flights at half of the usual one way
The sales of the bicycle (in thousands of dollars) and also the levels of media expenditure (in thousands of dollars) during the test month are recorded. State the multiple regression equation.
(a) a white chip on the first draw?
Draw the histogram for these data using an initial class boundary of and a class width of . Note that you can add or remove classes from the figure. Label each class with its endpoints.
Forty percent of the sample wanted more local news. What is the 99% confidence interval for the proportion of readers who would like more coverage of local news?
We found our proportion of getting doubles was 15% to 16%. Using probability theory how often (i.e, what proportion of time) would you theoretically expect to roll doubles from 2 fair dice?
Take your data and arrange it in the order you collected it. Count the total number of observations you have, and label this number N. Then create another set of data starting from one and increasing by one until you reach N.
Find the number z such that 22% of all of observations that are less than z in a standard observations from a standard normal normal distribution is 0.98.
Consider the vector X in Problem 5.7.1 and define the average to be Y = (X1 + X2 + X3)/3. What is the probability that Y > 4? In this problem, we extend the proof of Theorem 5.16 to the case when A is m × n with m X = 0.
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