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A particular type of sony tv has a mean life time of 25 hours and a standard deviation 350 hours and the life time is normally distributed. suppose a bar buys 10 of these sony tvs what is the probability that the average life time of the bar's tv is less than 19,650 hours.
A vending machine dispenses coffee into a twelve ounce cup. The amount of coffee dispensed into the cup is normally distributed with a standard deviation of 0.08 ounce.
Use Hypothesis testing to compute te correlation between these two variables and these it for significance. Test at .01 level of significance.
Should mean disposable income be used to predict sales based on the sample of 14 Sunflower stores? Are there any other factors not mentioned by the leasing agents that might be relevant to the store leasing decision?
A commuter travels many miles to work each morning. She has timed this trip 5 times throughout the last month. The time (in minutes) required to make this trip was 44, 39, 41, 35, and 41.
A random sample of n=9 men between 30-39 years old is asked to do as many sit ups as they can in one minute. The mean number is x=26.2 and the standard deviation is s=6. Find a 95% confidence interval for the population mean.
Assuming that the distribution of the salaries is normal, what is the probability that the average for this sample is between $36,000 and $42,000.
Provide one example in the accounting department that you can apply a contingency table to. Briefly explain how a contingency table can be useful.
To find the probabilities values of standard normal variable
A researcher wishes to forcast the proportion of fish in a perticular lake which is inedible due to pollution of the lake.
Seiko purchases watch stems for their watches in lots of 10,000. Seiko's sampling plan calls for checking 20 stems, and if 3 or fewer stems are defective, the lot is accepted.
Company A is hoping to expand its operations and a small group of investors is visiting next week. You are tasked with the duty of explaining how Company A uses this information from a linear programming model to optimize its shipping.
If two American adults are randomly selected, what is the probability that neither of them has ever experienced a migraine headache?
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