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Question 1
The American Milk Association is claiming that men drink more milk than women. If a sample of 45 men drink on average 26 oz of milk a day with a standard deviation of 5oz. A sample of 40 women drink on average 24oz of milk a day with a standard deviation of 3oz. At the .10 significance level, Using Calculated z value of 2.26. State the p-value.
a. 0.0119
b. 0.0238
c. 0.4884
d. 0.10
Question 2
To compare the effect of weather on sales of soft drinks, a soda manufacturer sampled two regions of the country with the following results. Is there a difference in sales between the 2 regions? What is the null hypothesis?
_____________Region A______Region B
Sample Size____1000__________1500
Sales__________400___________500
A. Proportion (pie)A = Proportion (pie)B
B. Proportion (pie)A ≠ Proportion (pie)B
C. Proportion (pie)A ≤ Proportion (pie)B
D. Proportion (pie)A ≥ Proportion (pie)B
Same survey showed that average length of time each store was in business in 6 years, with standard deviation of 2.5 years. Which is more variable, number of magazines or number of years?
It is known from previous studies that the population variances are 8.1 and 7.3 respectively. Using a level of significance of .01, is there evidence that the out of state students may be receiving lower grades? Fully explain your answer.
Determine the mean and standard deviation for x = the amount paid by individual visitors.- Determine the mean and the standard deviation for the sampling distribution of for samples consisting of 3 visitors each.
How much more cereal do you expect to be in the large bowl?- If the difference follows a Normal model, what's the probability the small bowl contains more cereal than the large one?
What is the probability that: A single contestant finds all three "daily doubles", The returning champion gets all three of the "daily doubles" and Each of the players selects precisely one of the "daily doubles"?
Assume that the heights of 5 year old boys are normally distribued with a mean of 100cm and a standard deviation of 60. What is the sampling distribution of the mean for a sample size of 900 and its confidence interval at the 99% level?
Suppose Trek claims to have the lightest mountain bikes on the market, with a mean weight of 10 kg. Using your answer in part (a), is there any evidence to suggest this claim is false? Justify your answer.
The middle five weeks, and 60% during the last 5 weeks. Would a time-series graph of this data be appropriate? Give a reason for your answer.
Where does the p-value come from for the spatial scan statistic used in SaTScan? How Monte Carlo simulation is used to derive a p-value for a cluster ?
george is curious. he has been told that the average body temperature of humans is 98.6 degrees fahrenheit. however he
How much would you expect the price of an antique grandfather clock to increase if its age increased by 1 year?
How many ways can a Math Club schedule 4 speakers for 4 different meetings if they are all available on any of 6 possible dates?
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