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The Montana State Education Commission wants to estimate the percentage of tenth-grade students who read at or below the eighth-grade level. How large a sample should be selected in order to estimate this proportion with a 98% confidence level and a margin of error of at most 2%? (Assume no preliminary estimate of p-hat is available.)
Scores below the top 78% and above the bottom 7% F: Bottom 7% of scores. Scores on the test are normally distributed with a mean of 72 and a standard deviation of 8.1. Find the numerical limits for a B grade. Round your answers to the nearest whol..
Car B turns such that its speed is increased by where t is in seconds. If the car starts from rest when ? =0° , determine the magnitudes of its velocity and acceleration when the arm AB rotates ?=30°. Neglect the size of the car
High levels of glucose in the blood are indications of diabetes, which is becoming more prevalent in the United States. Diabetes can lead to many complications such as blindness and heart disease. A random sample of 180 individuals had their blood su..
The unmanned exploration of planets such as Mars requires a high level of autonomy because of the communication delays between robots in space and their Earth-based stations. This affects all the components of the system:
A newspaper writes" this show that there is roughly a 92 percent chance that the difference between the two counts is due to some irregularity other than simply chance alone" Do you agree with the newspaper's interpretation of the p-value Explain ..
a company that manufacturers coffee for use in commercial machines monitors the caffeine content in its coffee. the
Let X, , X 2 and Y1 , Y2 be independent random mples, each of size n = 2, from distributions with respective probability dnsity .·· functions f( x) = 1, 0 x 1, zero elsewhere, and g( y) . 3y2, 0 y 1, zero elsewher..
It was thought that the national average price per pound for Ospertan Basil Oil in 1999 in the US was $14 per pound. Since that time the Ospertan Basil Oil Cartel (OBOC) has tried to limit the supply of Ospertan Basil Oil reaching the U.S in order..
Find data set that maximizes the value of the mean.- Find a data set that minimizes the value of the mean.- Find two different data sets that have a mean equal to 3 but different standard deviations.
a rug manufacturer has decided to use 7 compatible colors in her rugs. however in weaving a rug only 5 spindles can be
A new soft drink is being market tested. A sample of 400 individuals participated in the taste test and 80 indicated they like the taste. At a 5% significance level, test to determine if at least 22% of the population will like the new soft drink.
The self-service prices for a sample of 15 retail outlets during Labor Day weekend of 2007 in the detroit, michigan area. What is the arithmetic mean selling price?
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