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A sample of the math test scores of 35 fourth-graders has a mean of 82 with a standard deviation of 15.
Find the 95% confidence interval of the mean math test scores of all fourth-graders.
Find the 99% confidence interval of the mean math test scores of all fourth-graders.
Which interval is larger? Explain why.
What is the predicted GPA if a person watches 12 hours of television per week?
It is reported that 45% of all college professors are extroverted. Suppose you have classes with six different professors. What is the probability that all six are extroverts?
Describe the given data show a seasonal effect using moving average method. Describe the data which show a seasonal effect.
a researcher can test at the
One of the 4 bus drivers is also randomly selected. Let Y denote the number of students on his bus. Compute the expectations of X and Y?
A company will promote two employees out of a group of six men and three women, what would you say the chances of this experiment if there is particular concern about gender equity and which concept of probability would you use to estimate these p..
Based on this information, determinethe probability that specific fare will exceed $15.00?
By constructing null and alternative hypotheses, computing critical values, and comparing test statistic to critical value.
The sample mean is 4.1 and the sample standard deviation is 1.4. It can be assumed that the population is normally distributed. The degrees of freedom associated with this are?
A simple random sample of 120 orders will be used to estimate the porportion of first time consumers. Assume he is correct. What is the sampling distribution of p for the study?
Experience has shown a company that the cost of delivering a small package within 24 hours is $14.80. The company charges $15.50 for shipment but guarantees to refund the charge if delivery is not made within 24 hours.
Either no change to the Objective function or a raise in the value of the objective function depends on the constraint.
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