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To test H0: μ = 45 versus H1: μ ≠ 45, a simple random sample of size n = 40 is obtained.
(a) Does the population have to be normally distributed to test this hypothesis by using the methods presented in this section? Why?
(b) If = 48.3 and s = 8.5, compute the test statistic.
(c) Draw a t-distribution with the area that represents the P-value shaded.
(d) Determine and interpret the P-value.
(e) If the researcher decides to test this hypothesis at the α = 0.01 level of significance, will the researcher reject the null hypothesis? Why?
(f) Construct a 99% confidence interval to test the hypothesis.
Determine payback period for implementing Oracle Discoverer? Assume that WebFocus will be in-place until December 31 and the migration to Oracle will be done concurrently and is expected to be completed and operational by Dec 31 as well.
the cardinal machining company manufactures nails. the quality control department randomly collects 75 nails from the
The Nile Superstore is conducting a survey of consumer preferences for a new wireless, e-book reader. A sample of 160 people reveals that 120 would buy the new reader. Estimate the value of the population proportion.
A company produces two products that are processed on two assembly lines. Assembly line 1 has 100 available hours, and assembly line 2 has 42 available hours.
a. What is the probability that none of the accounts chosen will be delinquent? b. What is the probability that at most one of the ac counts chosen will be delinquent? c. What is the probability that there will be three cur rent, one past due..
Two teams of workers assemble automobile engines at a manufacturing plant in Michigan. Quality control personnel inspect a random sample of the teams assemblies and judge
A crossover trial is planned to evaluate the impact of an educational intervention program to reduce alcohol consumption in patients determined to be at risk for alcohol problems
peggy has drawn two cards from a standard dock and obtained an ace of clubs and a king of clubs. if peggy draws three
Also use the regression model to predict a student's average if he/she misses 4 classes.
The service time for customers at Stylum Barber Shop follows a normal distribution with a population standard deviation of 2 minutes. At the beginning of the fiscal year, the owner conducted a time study of 25 customers and discovered that the mea..
He continues this until he draws a number that is less than the comparison value, at which point he continues his interrogation. If he draws a 3 as the comparison value, what is the expected number of lashes you will receive for that question?
What is the null and alternative hypothesis (in symbols) for this t-test and use the appropriate t-test statistic?
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