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If you use a 0.10 level of significance in a two-tail hypothesis test, what is your decision rule for rejecting a null hypothesis that the population mean is 500 if you use the Z test?
What is the probability for the given frequency distribution?
The probability is 90% that the sample percentage is contained within what symmetrical limits of the population percentage?
The point estimate for the difference between the proportions is:
They are thinking of introducing a new flavour, maple-marshmallow Frumpies, and want to know whether children will prefer the new flavour to the old one. Design a completely randomized experiment to investigate this question.
What is their maximum error of the estimated mean quality for a 92% level of confidence and an estimated standard deviation of 8?
Find the probability between the given values for normal distribution.
Can we conclude that the mean time for a game is less than 3.50 hours? Use the .05 significance level.
Soft Drinks a vending machine automatically pours soft drinks into cups. As the amount of soft drink dispensed into a cup is normally distributed
If a randomly selected student is a female student, what is the probability she is a C student?
You want to know whether the population means are different in the two populations. Conduct an hypothesis test using an alpha of .05 and the critical value method.
The sample size n, the sample means, and the sample standard deviations for the two groups are given
What is the probability the number of fatal crashes will be between 1000 and 2000 for a year?
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