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A researcher wishes to know, with 98% confidence, the percentage of women who wear shoes that are too small for their feet. A previous study conducted by the Academy of Orthopedic Surgeons found that 80% of women wear shoes that are too small for their feet. If the researcher wants her estimate to be within 3% of the true proportion, how large a sample is necessary?
A.966 B.683 C.183 D.484
When bucketing data for a histogram what is the standard way of dealing with data entries that are on the boundary of two buckets?
The East Coast researcher decides to construct a two-sided 99% confidence interval. Which researcher will have the more precise estimate?
suppose you are using a completely randomized design to study some phenomenon. there are three treatment levels and a
The Greenberg public hearing meeting turned stormy. Citizens from four suburbs were gathered at city hall to try to get the city's federal funds for their own suburbs. The government recently awarded $750,000 to the city for road improvements. The..
Estimate the proportion of infants whose mothers experienced toxemia during pregnancy. Use 95% confidence level and doctors think that more than 20% of the infants their mothers experienced toxemia. Is that correct?
Draw two pie charts, which allow the total yearly exports to be compared. Explain the trend in the export of fish as shown in the two pie charts.
At a certain pizza parlor, 45% of the customer's order a pizza containing onions, 38% of the customer's order a pizza containing sausage, and 79% order a pizza containing onions or sausage
Demonstrate your understanding of choosing the type of regression model to the given data, by explaning three factors that should be taken into account in the choice between different models.
A sample of 64 observations is selected from a normal polulation with a population standard deviation of 15. The sample mean is 215. Ho: U>= 220 and H1: U
LINEAR PROGRAMMING MODELS
a hypothesis test produces a t statistic of t 2.20. if the researcher is using a two-tailed test with a .05 how large
State a type I error and describe why it happens. Describe the factor that researcher can control to change type I error. Also, describe how type I errors can be avoided.
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