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A poll of 1100 randomly selected students in grade 6 trrough 8 was conducted and found that 47% enjoy playing sports. would confidence in the results increase if the sample size were 3600 instead of 1100. why or why not?
Births with gestation time of 258 days or less are regarded to be premature births. Determine the probability that randomly selected pregnant woman will give birth to premature baby?
What is the coefficient of x^5 in the polynomial -8x^5+0x^3+14? Find the slope of the line that contains points (-4,-2) and (1,1)
The x and the y variable in the table below are correlated. Determine the 'R' value, and then determine the regression equation.
Compare and contrast internal and external validity. Describe and give examples of research questions for which external validity is a primary concern.
Find the value of Z-score- standard normal distribution.Find out a value of the standard normal random variable z, call it z0.
According to Bienayme-Chebyshev rule, what percentages of these funds are likely to be within ±2 standard deviation of mean?
The researcher in exercise decides to conduct the same study using a within - participates design to control for differences in cognitive ability.
It is impossible to obtain a standard error less than 2 for any sized sample.
In playing the Lemonade Stand Game, Bob decreased his price per cup by two cents, from $.27 per cup to $.25 per cup. At the .05 level of significance, did net revenue increase?
The manager wants to know the probability that any particular cookie will have fewer than 5. What type of probability distribution will most likely be used to analyze the number of chocolate chips per cookie?
A diet is being developed which must contain at least 100 mg of vitamin C. Two fruits are used in this diet. Bananas contain 30 mg of vitamin C and Apples contain 20 mg of vitamin C. The diet must contain at least 100 mg of vitamin C. Which of the..
A recent study focused on the number of times men and women who live alone buy take-out dinner in a month. The information is summarized below.
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