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Suppose that 69% of all college women have been on a diet within the last 12 months. A sample survey interviewed an SRS of 228 college women and found 73% or more of the women in the sample have been on a diet. Is the true proportion of college women that have been on a diet within the last 12 months in this survey more than the stated proportion?
Scores on certain nationwide college entrance examination follow normal distribution with mean of 500 and a standard deviation of 100. Determine the probability that student will score?
If campaign can be expected to also to rise the probability of best case scenario to 0.4, is it a good investment.
Let X bar be the average of n such independent measurements. Use Chebychev's inequality to estimate how large n should be such that P(|X bar - M |
According to a hospital administrator, historical records over the past 10 years have shown that 20 percent of major surgery patients are dissatisfied with after-surgery care in the hospital. A scientific poll based on 400 hospital patients has ju..
Find the LCD for the following rational expressions, and convert each rational expression into an equivalent rational expression with the LCD as the denominator.
A researcher demonstrated a correlation of r = 0.60 between teacher attire and student academic performance across 150 grade schools in her state.
Millie and Senta Meter have recently taken Pre and Post test in achievement. The test were normally distributed. Millie's percentile rank changed from 57.93 to 77.34. Senta's changed from 1.07 to 4.95.
If the manufacturer's claim is true, what is the probability that the claim will be rejected?
The length of a particular telemarketing phone call has an exponential distribution with a mean equal to 1.5 minutes. Find the probability that the length of a randomly selected call will be between 30 - 50 minutes and 1 minuter or longer.
A marketing survey is conducting in which students are to taste two different brands of soft drink. Their task is to currently identify the brand tasted.
Why is statistical significance not necessarily of practical important difference to a business decision? Provide an example and explain.
The data show the total number of medals (gold, silver, and bronze) won by each country winning at least one gold medal in the 2006 Winter Olympics. Find the mean, median, and mode of the numbers of medals won by these countries.
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