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Suppose that 10% of all adults jog. An opinion poll asks an SRS of 400 adults if they jog.
a) What is the sampling distribution of the proportion p^ in the sample who jog?
b) According to the 68-95-99.7 rule, what is the probability that the sample proportion who jog will be 7.3% or greater?
Let z represent the standard normal variable and suppose a value is randomly selected. Find each of the following probabilities by:
One of the main measures of the quality of service provided by any organization is the speed with that responds to customer complaints. A large family-held department store selling furniture and flooring, including carpet, had undergone a chief ex..
What fraction of the calls last between 4.2 and 5 minutes?
Determine SSE, SS (Total) and the explained sum of squared variation SSR and find the estimated y intercept slope and write the regression equation.
What decision should be made regarding the null hypothesis?
Let x be a random variable that represents the commute time of teachers in a large urban area. If x is normally distributed with a mean of 46 minutes and a standard deviation of 5 minutes, find the commute time which is at the top of the bottom 25..
In 1965, a newspaper carried a story about a high school student who reported getting 9207 heads and 8743 tails in 17,950 coin tosses. Is this a significant discrepancy from the null hypothesis H 0 = 1/2.
What is the probability that a randomly selected tire will have a life of at least 30,000 miles?
How large sample size must be taken to be 95% confident.
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
Question: If the regression line is drawn as Y = C + 1075x, when X was 2 and y was 239, given that the intercept was 11. Calculate the residual
Determine and record how much of the math grade can be explained by the PE grade? How much of the Writing grade can be explained by the Reading grade?
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