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1. A random sample consisted of 36 patients, the mean of their pulse (sphygmus) is 78 times/min, and sd 6 times/min. a) Calculate the 90% confidence interval for the population mean of health men's pulse (sphygmus) in mountainous area. b) Can you conclude that the mean is significantly higher than 72 times /min (Which is the mean of pulse of health men)? .2. Suppose you survey 81 adult American males and record a mean weight of 194 pounds. The sample standard deviation is 35 pounds. a) Please construct a 95% confidence interval for the population mean. b) Suppose a prominent doctor contends that adult American males have a population mean weight of 220 pounds. Does the sample evidence support the doctor's hypothesis?
There are four levels of measurement, two are numeric and two are attribute data. This first time around, try to identify if a question produces a number or a text number.
Does correlation equal causation? Does the strength of correlation depend on the direction of the relationship? What is the meaning of a zero correlation? Explain your answers.
the study obtained a measure to determine how comfortable the shopper was in a store. Higher scores indicated greater comfort. Suppose the following data were collected. Use a = .05 to test for differences among comfort levels for three types of b..
You will actually have negative sales using this multiple regression analysis
Suppose that you perform a significance test regarding a population mean and that the evidence does not warrant rejection of the null hypothesis.
Why is the F distribution important? How do you determine if a significant difference exists among the groups in ANOVA? How do you determine differences between the groups in ANOVA?
Last week Sarah had exams in Math and in Spanish. On the math exam, the mean was m = 40 with s = 5, and Sarah had a score of X = 45. On the Spanish exam, the mean was m = 60 with s = 8 and Sarah had a score of X = 68. For which class should Sara e..
The data comes from a set of scores on a 50 point Bilogy 101 test. 90 subjects took the test. The scores range from 12-50. How to make a simple frequency distribution table, using the raw data?
1.suppose that a random sample of 41 state college students is asked to measure the length of their right foot in
For a sample of 120 students selected at random, what is the mean and variance of the number of students who watch this game?
Of 346 vending machines tested, 12 are found to be defective. Construct the 98 % confidence interval for the proportion of all defective vending machines.
What is the minimum sample size needed in order for you to be confident that your estimate is within 5 of ? Use the value for the population standard deviation of scores on this subsection.
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