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You are testing the claim that the mean GPA of night students is different from the mean GPA of day students. You sample 30 night students, and the sample mean GPA is 2.35 with a standard deviation of 0.46. You sample 25 day students, and the sample mean GPA is 2.58 with a standard deviation of 0.47. Test the claim using a 5% level of significance. Assume the sample standard deviations are unequal and that GPAs are normally distributed.
Hypotheses:
H0: μ1 = μ2
H1: μ1 ≠ μ2
What is the p-value for this scenario? Round to four decimal places. Make sure you put the 0 in front of the decimal.
p-value =___
IQ tests The Wechsler Adult Intelligence Scale (WAIS) is a common "IQ test" for adults. The distribution of WAIS scores for persons over 16 years of age.
1. Which child did you choose to observe and document motor development?
an experiment was conducted to compare the mean lengths of time required for bodily absorption of two drugs a and b.
Theoretically, if you toss two coins together forty-eight times, how many times should you get a head and tail. Input your 2 digit answer with no commas
The Dean of Instruction at a local college requested that a new standardized test for an introductory statistics course be developed with the requirement
Among 620 adults selected randomly from among the residents of one town, 18.9% said that they favor stronger gun-control laws.
For two samples from what are assumed to be normally distributed populations, the sample size and standard deviations are n1 = 10, s1 = 23.5, n2 =9 and s2=10.4.
Suppose that in Example 1 the manufacturer of the new medication feels that the odds are 4 to 1 that with this medication the recovery rate from the disease is 0.90 rather than 0.60. With these odds, what are the probabilities that he will make a..
Conduct a two-sample t test to determine whether there is any evidence to suggest that the population mean street widths are different.
indicate whether the following statement is true or falsea if the hypothesis hsub0betasub10 is rejectedthen it can be
A reporter for a school newspaper is charged with determining the average amount of money that students spend on books. Discuss the potential sources
People are arriving at a party one at a time. While waiting for more people to arrive they entertain themselves by comparing their birthdays.
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