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Let the random variable X follow a normal distribution with μ =60 and σ2 =49
Find the probability that X is less than 65.
The probability is 0.2 that X is greater than what? number?
The probability is 0.03 that X is in the symmetric interval about the mean between which two? numbers?
Suppose two random variables X and Y are both zero mean and unit variance.- Determine under what conditions on the constants a, b, c and d the random variables W and Z are uncorrelated.
Over the past 50 days, the distribution of the number of successful calls made by the assistant is as shown below.- Using the 0.05 level of significance, test the goodness of fit between these data and a Poisson distribution with λ = 1.4.
Computing a linear regression equation to predict the future values of the dependent variable Y - Linear relationships into a single multiple regression.
frequency table speednumber of balls 0 - 29430 - 591660 - 896090 - 11920a professional tennis player hit 100 balls and
If the three balls are selected without replacement, what is the probability distribution of Y? What are the mean and standard deviation of Y?
Five pair of shoes print length and height were used to conduct a formal hypothesis test of the claim that there is linear correlation between the two variables. Use the value of r =0.591and find the appropriate test statistics method at 0.05 sign..
A test consists of 10 true/false questions. To pass the test a student must answer at least 6 questions correctly. If a student guesses on each question, what is the probability that the student will pass the test?
a psychologist claims that the mean age at which children start talking is 12.8 months. carlos wanted to check if this
To test this theory, a sample of 564 peas was studied with the result that 141 produced white, 291 produced pink, and 132 produced red flowers. Using the chi-square approximation, what conclusion would be drawn at the 5 percent level of signific..
Samples of three types of fish (rainbow trout, largescale sucker, and mountain whitefish) taken from the Spokane River were tested for lead content in milligram
Attitudes. In the study of older students' attitudes, the sample mean SSHA score was 125.7 and the sample standard deviation was 29.8.
question anaheim human resources inc. performs employment screenings for large companies in southern california. it
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