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Imagine that there are 100 different researchers each studying the sleeping habits of college freshmen. Each researcher takes a random sample of size 50 from the same population of freshmen. Each researcher is trying to estimate the mean hours of sleep that freshmen get at night, and each one constructs a 95% confidence interval for the mean. Approximately how many of these 100 confidence intervals will NOT capture the true mean?
A local bank wants to install motion detector burglar alarms. Each has a 70% chance of detecting a burglar. If the bank wants to be 99% certain of detecting a burglar how many need to be installed?
Suppose Ho: px = py isbeingtested agrunst H1:Px *py oo the basis of two independent sets of 100 Bernoulli trials. If x , the number of successes in the first set, is 60 and y , the number of successes in the second set, is 48, what P-value would b..
On a given day, the bakers at Mary Custard's found that they had 150 pounds of flour, 500 eggs, 90 pounds of sugar, and 120 pounds of fruit mixture with which to make pies. a. Formulate and solve a linear program that will give the optimal producti..
Use confidence interval to determine the estimated margin of error, Then determine the sample mean.
Calculate the z - scores for the three samples, compare the z score to the t-statistic, is the null hypothesis accepted or rejected?
A survey indicates that male employees were more likely than females to relocate without being promoted. What information would you want to know before you accepted the results of this survey?
Compute test statistic and p -value for each sample. (Negative amount must be pointed out by minus sign.)
suppose that three parachutists operate independently lands at a random point on a line between markers a and b. what
Let A and B be two sets such that there exists a function f from A onto B and a function g from B onto A. Show, assuming AC, that A and B have the same cardinality. Hint: If h(y) ∈ f -1({y}) for all y in B, then h is 1-1 from B into A.
The student wishes to test the null hypothesis is that there is no difference in A1C levels (the alternative hypothesis that there is a difference in A1C levels between the 2 groups). What is the critical t value for a t test that is testing the d..
If a random sample of 36 graduates had an average weekly income of $675, what would you conclude about the validity of the claim?
Construct and interpret the 90% Confidence Interval for the mean starting salary of college graduates in developmental psychology. Salaries are in thousands.
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