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A certain school has 200 male students. The school nurse would like to know how many calories the male students consume per day. So, she samples 60 male students and finds that the mean calorie consumption of the 60 is 2230 calories per day with a standard deviation of 190 calories per day. Find the 95 % confidence interval for mean calorie intake of all the male students in the school.
you write a new app that can take a picture of someone and automatically draw a funny mustache on them. it takes 3
the foreman at a large plant estimates that there are defective parts about 1 of the time. if the plant produces 20000
What were the actual percentages of local high school students in each category? (Round answer to two decimal places) State an appropriate null hypothesis for this analysis. What is the value of the chi-square statistic
The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?
On the road again. According to Exercise, the probability that a U.S. resident has traveled to Canada is 0.18, to Mexico is 0.09, and to both countries is 0.04.
A standard 6-sided die is weighted so that the probabilities of rolling 2,3,4,5 or 6 are equal and the probability of rolling 1 is three times the probability of rolling 2. If the die is thrown twice, what is the probability that the sum of the nu..
Suppose that 5 of a total of 20 company accounts are in error. An auditor selects a random sample of 5 out of the 20 accounts.
suppose that the number of dice thrown is a binomial random variable with n 10 and p 0.98. what is the expected
The article "The LoadLife Relationship for M50 Bearings with Silicon Nitride Ceramic Balls" (Lubrication Engr., 1984: 153-159) reports the accompanying data on bearing load life (million revs.) for bearings tested at a 6.45 kN load.
a sample set of 29 scores has a mean of 76 and a standard deviation of 7. can we accept the hypothesis that the sample
What is the probability of a type 1 error in this situation? What does it mean?
a^2 + b^2=c^2 + d^2 where a,b,c,d are real numbers(describe equivalence cl). For a pair of fractions a/b and c/d define a/b ~ c/d if ab=cd(same here)
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