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P-value from tstat. A one-sample t statistic for H0: µ = 0 based on n = 16 is tstat = 2.44.
(A) How many degrees of freedom for the test statistic?(B) Provide the t values from the t table that bracket the tstat.(C) What is the approximate one-sided P-value for this problem?
A food snack manufacturer samples 7 bags of pretzels off the assembly line and weighs their contents. If the sample mean is 12.7 oz. and the sample standard deviation is 0.40 oz., find the 95% confidence interval of the true mean.
A sample of 36 packages reveals the mean weight to be 3.01 pounds, with a standard deviation of 0.03 poounds. What is the estimated population mean?
Explain the difference between the null hypothesis and the alternate hypothesis. How is the null hypothesis chosen (why is it null)? What is the importance of rejecting the null hypothesis in relation of the sample to the population?
Athlete will be disqualified during the next grading period?
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the oth..
An experimental bumper was designed to reduce damage in low-speed collisions. This bumper was installed on an experimental group of vans in a large fleet, but not on a control group.
Use the above information to calculate the number of watches (units) and the sales dollars we need in order for our flea market business to break even for the day.
Sstandard deviation of the test scores are 74 and 2, respectively, and the distribution of scores is bell-shaped and symmetric. Suppose the trainee in question received a score of 69. Compute the trainee's z-score.
Polls showed the two main candidates in the 2004 presidential election were nearly tied on the day before the election. To predict the winner a newspaper would like to have a poll that has margin of error less than 1%. Roughly how large a sample w..
The critical values are values of the test statistics that separate the rejection region from the non rejection region. Is this true? Explain answer.
Also, 72 percent of the managers have MBA degrees. Using the probability formulas, find the proportion of employees who either have MBAs or are managers.
A geological study indicates that wells drilled in a certain area should strike water with probability 0.2. Find the probability that:
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