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As part of a safety check, the Keystone Cops randomly stopped 65 ambulances and checked their tire pressure. The sample mean was 32 lbs/sq. in. with a sample standard deviation of 2 lbs/sq. in. Find the 98% confidence interval for the population mean.
A fair coin was flipped three times and landed heads three times. What is the probability of a head on the next toss?
What is the probability that a randomly selected fertilized egg hatches in less than 19 days? (Round to four decimal places as needed).
If level of significance ( α ) is 0.005 in two-tail test, how large is non rejection region under curve of the t distribution?
Using this information, calculate Blpha risk (probability of Type II error) if the true population mean really is 79.
Mention your decision regarding the null hypothesis. If H 0 rejected can we conclude that treatment 2 and treatment 3 differ? Use 95 percent level of confidence.
SAT Math scores have a bell-shaped distribution with a mean of 515 and a standard deviation of 116. a) what percentage of SAT scores are between 399 and 631?
At.05 level of significance, is there evidence to propose that mean life length of the batteries manufactured by this manufacturer is more than 400 hours?
Examine the relationship between final grade and the reported hours per week each student said they studied for the course. Do we have evidence that females are being discriminated against?
Find the critical value for different types of sample size and level of significance:
The one-sample t statistic has the value t = -1.68. What do we know about the P -value of this test?
Find Probability of independent events.Consider again the auto repair rates described. If you own two cars, what is the probability that.
What is Peter's median grade point at graduation? What is the shape of the grade point distribution?
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