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In a large lecture class, the professor announced that the scores on a recent exam were normally distributed with a range from 51 to 87. Using the Empirical Rule ? ± 3? to estimate ?, how man
If 5 percent of automobiles in Oakland County have one burned-out headlight, what is the probability that, in a sample of 10 automobiles, none will have a burned-out headlight?
Consider the following sample of seven chemical yields. Use this sample to test that the population median is greater than 790.
Suppose you wish to test the claim that µis different from 113.9. given a sample of n = 218 and a significance of 0.10, what criterion would you be used for rejecting the null hypothesis? assu
You want to compare response rates (percents) of two regimens. A power of 90% and a two-sided test of size 0.05 are desired. How many patients are needed to detect a difference between true response
Suppose the mean systolic blood pressure in a group of individuals is 150 mmHg, with a standard deviation of 15. Assuming SBP follows a normal distribution in this population, cimpute the following:
A manufacturer of industrial solvent guarantees its customers that each drum of solvent they ship out contains at least 100 lbs of solvent. Suppose the amount of solvent in each drum is normally dis
A doctor is trying to determine whether her patients prefer a male nurse or a female nurse. After asking 25 male patients, 18 said they would prefer a female nurse. Apply the six steps of hypothe
Looking at research conducted comparing salaries of state employees from city employees.
How do you find chi square left and chi square right using the ti-84 plus given that you know the confidence level, sample mean, standard deviation and sample size?
A study estimate the mean annual people income for people living in public housing in California. for a random sample of 30 ppl the annual incomes are:
What is the probability that a supply is poor? When a load supply is lacking, what is the probability that it is of the company a?
Construct a 99% confidence interval for the difference between the two population proportions. Assume that the samples are independent and have been randomly selected.
Using the Minitab t calculator, Find the value from the t distribution (to two decimal places) for the calculation of a margin of error for 92% confidence and 38 degrees of freedom is?
In general, when dealing with inferences for two population proportions, which two of the following are equivalent: Confidence interval method; P-value method; critical value method?
In a recent New York City marathon, 25,221 men finished and 253 dropped out. Also, 12,883 women finished and 163 dropped out. We want to use a .01 significance level to test the claim that the rate
You randomly select and measure the contents of 10 bottles of cough syrup. The results (in fluid) are shown. Assume the sample is taken from a normally distributed population. Construct 95% confiden
Nissan sold three models of cars in North America in 1999: Sentras, Maximas and Pathfinders. Of the vehicles sold, 50% were Sentras, 30% were Maximas and 20% were Pathfinders. In the same year 12% o
Using an alpha level 0f 0.01 determine if there is a difference in the varibility of the two tire brands.
Please tell me the class width, class limits, class boundaries, midpoint, frequency, relative frequency, and cumalitive frequency
If Ho: B1 = 0 is not rejected, what is the best estimate for the value of the response variable for any value of the explanatory variable?
Does the difference between the probabilities of parts (a) and (b)explain how insurance companies stayin business? Large auto insurers are certainly profitable. One report, for example, claims that
1. What are the assumptions of the simple linear model? 2. Name three assumptions of the ANOVA test?
A television station estimates that 60% of college studentswatch the super bowl. For a sample of 240 students selected at random, what is the mean and variance of the number of students who watch th
On the average, the annual profits are $8000 for each elementary book, $7000 for each intermediate book, and $1000 for each advanced book. How many new books of each type should be published to max