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Another one, I need these corrected so I can figure the correct way. Please help!
DF is wrong; can not pool variances when they differ this much; there appears to be an error on the low end of the CI; "The test statistic t (998) = -7.89, with p-value = 0.000 < 0.001 indicates that the data provides a strong evidence against the null hypothesis. So reject the null hypothesis." - but what is H0 that we are rejecting?
Tompkins Associates reports that the mean clear height for a Class A warehouse in the Unites States is 22 feet. Suppose clear heights are normally distributed and that the standard deviation is 4 feet.
Find a 90% confidence interval for the population mean weight of all such turtles.
Given an infinite population with a mean of 75 and a standard deviation of 12, the probability that the mean of a sample of 36 observations, taken at random from this population
Surface area of a cube. The formula A=6V^2/3 gives the surface area of a cube in terms of its volume V. What is the volume of a cube with surface area 12 square feet?
A university wants to determine the proportion of students who use a cash card to pay at the university food service. Out of 100 students surveyed, 65 students use a cash card. Estimate the value of the population proportion.
A retail federation conducted a nationwide survey of 1000 adults last October and found that approximately 55% of the respondents planned to do some type of Halloween decorating.
Separately choose at random 2 of those under 21 to interview about attitudes toward alcohol. You have given every student at the party the same chance to be interviewed: what is that chance?
Find the largest number of room reservations that this hotel can book and still be at least 95% sure that everyone who shows up at the hotel will have a room on a given night.
CHris Turlock owns and manages a small business in San Francisco, California. The business provides breakfast and brunch food, via carts parked along sidewalks, to people in the business district of the city.
Determine the value of population mean? What is the best evaluate of this value?
What was the purpose of calculating a Cohen's d? When is a Cohen's d calculated? Interpret d=.90. What does it mean in this example?
Estimate the population in 1600 and graph the population trend from 1600 through to 2000
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