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One of the significant features of camera is battery life as measured by number of shots taken until battery needs to be recharged. Data at left contain battery life of 31 subcompact cameras and 15 compact cameras. Suppose that population variances from both kinds of digital cameras are equal, is there evidence of difference in mean battery life between two kinds of digital cameras at 0.05 level of significance.
A campus researcher wanted to investigate the factors that affect visitor travel time in a complex. multilevel building on campus.
A recent study, "[b]ased on data from a survey of nearly 1,500 Boston men aged 18 to 35 years...found that 16 percent of the men - about one in six -- said they had abused their partner physically or sexually within the past year.
A random selection of accounting firms from three regions is taken and they are asked to state the starting salary for a new accounting graduate. Do a one-way ANOVA to analyze these data using a 1% level of significance:
Describe the five steps of hypothesis testing. Compare Type I and Type II errors and give specific examples for each. Which error should be minimized the most and first?
Why is a normal distribution called "normal"? Investigate the answer to this question on the internet and share the answer in your own words. Be sure to cite your sources.
Critically discuss the difference between the "skewedness" of the distribution of a dataset and its "kurtosis"? What is the expected value (EV) of an investment if there is a 20% chance of realizing a return of $20,000 or a 55% chance of realizing a..
A Tamiami shearing machine is producing 10 percent defective pieces, which is abnormally high. The quality control engineer has been checking the output by almost continuous sampling since the abnormal condition began.
Predict with 95% confidence the test score at a school where 50% of the mathematics teachers have mathematics degrees, the mean age is 43, and the mean annual income is $48,30.
The number of column inches of classified advertisements appearing on Mondays in a certain daily newspaper is normally distributed with a population mean of 320 and a population standard deviation of 20 inches.
A presidential candidate's aide estimates that, among all college students, the proportion p who intend to vote in the upcoming election is at least 60%.
MATH1550H: Assignment: Question: A word is selected at random from the following poem of Persian poet and mathematician Omar Khayyam (1048-1131), translated by English poet Edward Fitzgerald (1808-1883). Find the expected value of the length of th..
The booster club has gotten several businesses and car dealers to donate gasoline and cars for the college students to use to make a maximum of 575 personal contacts daily during the fund-raising drive. The college student will donate a total of 2..
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