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A medical doctor wishes to test the claim that the standard deviation of the systolic blood pressure of deep sea divers is less than 450. To do so, she selected a random sample of 20 divers and found s = 432.
Assuming that the systolic blood pressures of deep sea divers are normally distributed, if the doctor wanted to test her research hypothesis at the .01 level of significance, what is the critical value?
Place your answer, rounded to 3 decimal places, in the blank. For example, 4.567 would be a legitimate entry.
Calculate the value of the chi-square statistic and test whether all regions are statistically the same at 5% and 1% level tests.
Determine the probability that tire wears out before 70,000 miles?
Results were analyzed using one -way ANOVA and included SSTR =7 , 102 and SSE = 10 ,511. Are all 8 tapes equally appealing on average? Determine p value?
The 95% confidence interval for the mean of the sampling distribution of the mean is about:
Determine the margin of error that corresponds to the given values of n (times) and x (successes) and the degree of confidence: n=1400, x=420, 95%. Go 3 decimal places of precision.
What value is standard deviation for this data? What type of probability is this?
Conclude whether the given conditions justify using the methods of this section when testing a claim about a population mean µ.
Assuming that the variability is unchanged (i.e., σ = 6), is there sufficient evidence to suggest that the strength of the product has increased at the 1% level of significance?
What was the highest score earned on the exam? According to Chebyshev's Theorem, how many students scored between 42 and 74?
Find out sample correlation coefficients of (I) age with dry weight, and (2) age with log 10 dry weight. Interpret your results.
How do we decide if the homogeneity of variance assumption is significantly violated?
A large tank of fish from a hatchery is being delivered to a lake. The hatchery claims that the mean length of fish in the tank is 15 inches, and the standard deviation is 2 inches. A random sample of 36 fish is taken from the tank.
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