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A consumer survey indicates that the average household spends m=$155 on groceries each week. The distribution of spending amounts is normal with a standard deviation of o=$25. Based on this distribution
a) What proportion of the population spends more than $150 per week on groceries?
b) What is the probability of randomly selecting a family that spends less than $110 per week?
c) How much money do you need to spend each week to be in the top 10% of spenders?
What is the 95% confidence interval for the difference between the mean prices of the two models?
Is there evidence of a difference in objection to sharing information among the organizational groupings? (use α = 0.05)
In the real world, a given null hypothesis is false; but the collected data lead to the null hypothesis being accepted. That is, the data lead to a failure to reject the null hypothesis.
Choose one of these tests and describe in your own words, the purpose of the test, any particular assumptions or limitations pertaining to the test, and provide an example where you could employ the test.
what size sample should the director choose if she wishes to estimate the mean number of admissions per 24-hour period to within 1 admission with 99 percent reliability.
Estimate with 95% confidence the mean reduction in time it takes for someone who has taken the sleeping pill to fall asleep.
Explain how many cars would required to go by the speed trap to be 99.8% sure which at least one driver will warm oncoming traffic of the speed trap.
Harrington Health Food stocks 5 loaves of Neutro-Bread. The probability distribution for sales of Neutro-Bread is listed in following table. How many loaves will Harrington sell on average?
Determine x-bar and s for this data set. You may suppose the values for bulb life are normally distributed. Use traditional method to make your decision.
Formulating null and alternative hypothesis to test the claim averaging about $5000.
if you sample 100 people and 20 turn out to be over 65 inches tall, you get $20. Which is better: a sample of size 100 or a sample of size 1,000? Choose one and explain. Does the law of averages relate to the answer you give?
The number of passengers arriving at an airport terminal average 1200 each hour. To process passengers (check in, take luggage, etc) take an average of 6 minutes each. There are 6 airport staffers processing passengers. How long is the average wai..
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