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A machine is designed to fill some snack-sized potato chips with normally distributed weights with a mean of 6 oz. and standard deviation of 0.5 oz. If one bag of potato chips is randomly selected,
a. What is the probability that its weight is between 2.5 oz to 7.5 oz?
b. What is the probability that its weight is less than 7.5 oz?
c. If 40 bags of potato chips are randomly selected, what is the probability that their mean weight is between 5.5 oz to 6.5 oz?
d. If 40 bags of potato chips are randomly selected, what is the probability that their mean weight is less than 7.5 oz?
The standard deviation is 0.73. Would it be unusual to randomly select 10 people and find that greater than 8 recognize the Famous Brand?
what is the probability that a randomly selected value from the distribution will be greater than 2.1 standard deviations avoe the mean?
A continuous random variable, x, is normally distributed with a mean of $1000 and a standard deviation of $100. Convert each of the following x values into its corresponding z-score.
What is the 95% confidence interval for the proportion of all delinquent customer accounts at this manufacturing company?
At the 0.05 significance level, is there a difference in the proportion of viewers watching the three channels? State the null and alternative hypothesis. Identify the level of significance: Given at 0.05
find the area under the standard normal curve between z 0 and z 2.34. round the answer to 4 decimal
Give an example of how Regression Analysis can be used in your work to make a business decision. Give the dependent and independent variables.
Generate a testable null statistical hypothesis and an alternative statistical hypothesis. Select an alpha level of .05, .01, or .001 and justify your choice.
At 0.01 level of significance, is there evidence that mean price is higher at Whole Foods Market than at Fairyway supermarket? Interpret the meaning of p-value in (i).
if 42 of registered voters in a country are registered democrat and we select 8 random voters what is the probability
Use the given contingency table to (a) find the expected frequencies of each cell in the table, (b) perform a chi-square test for independence, and (c) comment on the relationship between the two variables.
The mean life of a battery used in a digital clock is 305 days. The lives of the battery follow normal distribution. The battery was recently modified to last longer. A sample of 20 of the modified batteries had a mean life of 311 days with a stan..
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