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Q1) Create confidence interval for population mean µ
C= 0.98, Xbar=607, s=0.9, and n=51
A 98% confidence interval for µ is ?
Q2) Use confidence interval to determine the estimated margin of error, Then determine the sample mean.
A biologist reports confidence interval of (2.5,3.9) when estimating mean height(in centimetres of sample of seedlings.
Estimated margin of error is ?
Sample mean is ?
Q3) Determine the critical value zc essential to form confidence interval at the level of confidence shown below
c-=0.96
zc = ?
Q4) Determine the margin of error for given values of c,s,and n
C = 0.90, s= 2.8 , n=36
E= ?
A manufacturer of 35-mm cameras knows that a shipment of 30 cameras sent to the large discount store contains 8 defective cameras. The manufacturer also knows that the store will choose two of the cameras at a random, test them, and accept the shi..
What is the probability that a randomly chosen eight-week old baby smiles between 2 and 18 seconds?
For this same sample of n = 45, find out the width of confidence interval around population mean? Illustrate all work.
If "fair" coin is tossed four times and comes up heads all four times, probability of heads on the fifth trial is?
Pretest-posttest design and internal validity threats - please discuss all threats to internal validity.
Find the value of the standard normal random variable z, called z 0 such that:
At 0.05 level of significance, is there enough evidence to conclude that difference exists between proportion of students who have ear infections at one school and the other?
Category of decision rule which contains maximax decision rule is?
A newspaper reports have 58 percent of farmers are planning to plant genetically modified crops presesnt year. The article adds that the poll is based on a random sample.
A stationery store wants to estimate the mean retail value of greeting cards that it has in its inventory. A random sample of 100 greeting cards indicates a mean value of $2.55 and a standard deviation of $0.44.
Public transportation and the automobile are two methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.
Find out the required probabilities utilizing Binomial distribution. According to Best buy, 2/3 citizens have iPods. In a randomly selected group of 3 iPod owners.
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