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You are taking a multiple-choice quiz that consist of 7 questions. each questions has four possible answers, only one of which is correct. to complete the quiz, you randomly guess the answer to each question. find the probability of guessing
a)exactly four answers correctly.b)at least four answers correctly.c)less than four answers correctly.
A random sample obtained from a population has a mean of µ=100 and a standard deviation of σ = 20. The error between the sample mean and the population mean for a sample of n = 16 is 5 points and the error between a sample men and population mean ..
A coin is flipped three times.a. Draw a tree diagram that represents all possibleoutcomes. b. Identify all branches that represent the event"exactly one head occurred.
A school administrator randomly selects 12 classes from your school and then selects all of the students of those classes to study a school library issue. Which type of sampling design is being used.
When the null hypothesis is rejected in the goodness-of-fit test, it means there is close agreement between the observed and expected frequencies.
Conduct a hypothesis test using H 0 : σ 2 = .009216 to see whether the sample data indicate that the variability in interest rates changed.
By using the normal distribution to approximate the desired probability.
PiggyBank has narrowed its options down to two incentive plans: A. cash back when the consumer makes an online purchase; and B. cash back when the consumer makes a purchase at a clothing store. The bank doesn't know whether consumers would shop on..
The firms are actually violating at least one regulaltion, what is the pmf of the number of firms visited by the inspector that are in violation of at least one regulation?
Discuss the fields in which Poisson distribution is applied. Why does it matter whether a population of arrivals is limited or unlimited?
Identify a research question from your professional life, research interests, or everyday experience that could be addressed by this analysis.
In comparing the two variances below, what is the test value and what are the degrees of freedom that should be used?
If the speed of lights is 3.00x 10 to the power of 8 m/sec, how long does it take light to travel 2.29x 10 to the power of 11 m, the distance from the sun to Mars? Round to one decimal place.
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