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1. (a) State the difference between Natural sale and Ration scale.
(b) What purpose is served by a semi-logarithmic graph paper?
(b) Explain a pictogram.
2. (a) Define an Ogive and how to obtain the value of median · graphically.
(b) Illustrate graphically the distinction between aftcquency polygon.
A histogram and ogive curve. Comment on their uses.
(c) Define angular diagram. Discuss the usefulness of diagrammatic representation of facts.
(d) Explain and illustrate a Histogram.
That a sample of 40 females gives an average production which is more than that based on a sample of 36 males by more than 6 items, assuming sampling with replacement, and that, the sample size for the two sexes being the same, the average product..
a cement manufacturer claims that concrete prepared from his product has a relatively stable compressive strength and
A sample of 140 golfers showed that their average score on a particular golf course was 93.38 with a standard deviation of 4.36. Answer each of the following (show all work and state the final answer to at least two decimal places.):
Although the packet claims a germination rate of 92%, only 171 or 200 test seeds sprout. Is this evidence that the seeds have lost viability during a year in storage?
Determine standard deviation be if sample contained 100 students rather than 50? How large the sample is required to decrease standard deviation of percentage who say "Yes" from 7% to 3.5%?
To estimate p, we use the proportion p-hat in the sample who answer "Yes." Justify the use of a normal approximation and find the following probabilities.
The dimension is supposed to be 224 mm and the variance is unknown for the manufacturing process. Is there evidence that the mean dimension is not 221 mm? Assume the population is normally distributed. Use a = 0.05 and the critical value value met..
give an unbiased estimator of the following and give the estimated variance assuming
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?
Explain the differences between longitudinal and cross sectional business research studies. Which two types of probability sampling are best suited for business research and statistical data analysis, and why?
Recognizing that the hike to the campsite is a long one, a limit of 35 pounds has been set as the maximum total weight of the items to be carried. Formulate this as a LP problem to maximize the total utility of items carried.
given a sample size of 34 with sample mean of 660.3 and stand dev of 104.9 we have the hypotheseisnull is h0u700alt hyp
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