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The height of woman ages 20-29 is normally distributed , with a mean of 63.8 inches. assuming the standard diviation = 2.8 inches. are you more likely to randomly select 1 woman with a height less t
Test the hypothesis that sugar content has a linear relationship with calories. Report and interpret the p-value for the test. Find and interpret a 95% confidence interval for the slope of this regres
A regression equation was fit to a set of data for which the correlation, r, between X and Y was 0.6. Which of the following must be true?i) The slope of the regression line is 0.6.ii) The regressio
A group of 50 randomly selected IUPUI students were asked about registration, and 35 said they were registered. Find a 95% confidence interval for the true proportion of IUPUI students who were regi
A local market research company has been hires to collect data about the salaries of recent college graduates. Based on their research, on average students graduating from business school with a deg
Was your test an upper one-tail, a lower one-tail, or a two-tail? Explain why you chose this kind of test. State the meaning of your P-value in this context.
From the data bank, select a random sample of 30 individuals. a. Use the z test to test the hypothesis for IQ that H0 = 100. Use ? = .05.
A paint manufacturer wants to determine the average drying time of new interior wall paint. If for 15 test areas of equal size he obtained a mean drying time of 66.8 minutes and a standard deviatio
If these figures are true for all Americans drivers, and if 20 such drivers are randomly sampled and asked what is the first big change they made due to higher prices, what is the probability that n
A survey of adults ages 18-29 found that 85% use the internet.You randomly select 118 adults ages 18-29 and ask them if they use the internet.
A company pays its employees an average of $15.90 an hour with a standard deviation of $1.50. If thh wages are normally distributed: What percentage of workers recieve wages between $13.75 and $16.2
Statistics released by the National Highway Safety Administration show that on an average weekend night in urban areas 1 out of every 10 drivers is operating under the influence of alcohol. If 400 d
Suppose the amount of cosmic radiation a person is exposed to when flying across the country is a random variable having a normal distribution with mean of 4.35 mrem and standard deviation of 0.59 m
A survey of adults ages 18-29 found that 82% use the internet. You randomly select 196 adults ages 18-29 and ask them if they use the internet.
An electronic switching device occasionally malfunctions and may need to be replaced. The device is considered Satisfactory ifit makes on average no more than 0.2 errors per hour. A particular 5 hou
A survey of adults ages 18-29 found that 82% use the internet.You randomly select 196 adults ages 18-29 and ask them if they use the internet.
Given the significance level 0.05, the F-value for the degrees of freedom, df = (3,7) is A. 6.16. B. 4.12. C. 4.35. D. 8.89
A student has five motor vehicle accidents in one year and claims that having five accidents is not unusual. Use the frequency distribution below to determine if the student is correct.
A regional survey of 560 companies asked the vice president of operations how satisfied he or she was with the software support received from the computer staff of the company.
Because of nonresponse, the fraction of women among recipients of the survey could be anything between (low) __________ and (high) _________.
The random variable x represents the number of cars per household in a town of 1000 households. Find the probability of randomly selecting a household that has between one and three cars, inclusive
What is the probability of randomly selecting 1 woman with a height less than 64.9 inches? What is the probability of selecting a sample of 22 woman with a mean height less then 64.9 inches?
Let x be the number of trials required to obtain a success where p is the probability of success on each trial. The hypothesis Ho: p=.1 is to be tested against the alternative Ha: p=.3. The hypothes
An advertisement for a popular weight loss clinic suggests that participants in its new diet program lose, on average, more than 10 pounds. A consumer activist decides to test the authenticity of th
The random variable x represents the number of cars per household in a town of 1000 households. Find the probability of randomly selecting a household that has at least one car.