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A correlation of .7 was found between time spent studying and percentage on an exam. What is the proportion of variance in exam scores that cane be explained by time spent studying? Either, .70; .49; .30. or .7?
A professor records the time (in minutes) that it takes 16 students to complete an exam. Compute the SS, the variance, and the standard deviation.
To estimate this proportion he went to a large student parking lot during the middle of a class day. He found that 325 out of 1037 cars (31%) were red.
Use the given margin of error, confidence level, and population standard deviation (o) to find the minimum sample size required to estimate an unknown population means (u)
Steps in hypothesis test procedure - conducting a hypothesis test for some general statistic, ? say.
1.a study was performed to examine the personal goals of children in grades 4 5 and 6. a random sample of students was
Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name. Estimate the value of the population proportion.
Refer to the Journal of Applied Ecology study of the feeding habits of baby snow geese, Exercise 10.11 (p. 577).The MINITAB printout for the model relating weight change (y) to digestion efficiency (x1) and acid detergent fiber (x2) is reproduced ..
the number of traffic accidents occurring in bloomington in a single day is normally distributed with a mean and a
Compute the suitable Test Statistic to test hypothesis that the proportion of condominiums that sold within 30 days decreased from 2006 to 2007.
The data is shown on the table. Is there a difference in mean SBP between treatments? Run the appropriate test at α= 0.05
Eagle airlines' planes hold only 15 people. Past records indicate that 20% of the people making a reservation do not show up. We will assume that all reservations are independent; that is each reservation is for one person and these reservations a..
The Evergreen Fertilizer Company produces fertilizer. The company's fixed monthly cost is $25,000, and its variable cost per pound of fertilizer is $0.15.
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