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The weight of eggs produced by u certain type of hen varies according to a distribution that is approximately normal with mean 6'5 grams and standard deviation 5 grams.
(a) What is the probability that a randomly selected from such a hen weighs more than 11.5 grams
(b) What is the probability that the average of a random sample of 25 eggs from such hens will be less than 5.8 grams ?
under the null hypothesis, what is the expected number of product A that would be sold by office 2. A contingency table is made up of 8 rows and 4 columns. how many degrees of freedom are present?
Ten asthmatics were asked to compare the effect of salbutamol and fenoterol sprays in relieving their asthma attacks. Assume that salbutamol and fenoterol are equal in terms of effectiveness and side effects in all people
Based on what we know about statistics and using your example, how do you believe statistics can enrich and represent the results of a study? How can statistics be used to misrepresent the results of a study?
Label and describeeach step of the hypothesis testing procedure, and be sure to specify whether this is a one-tailed or two-tailed test.
Research results suggest that IQ scores for boys are more variable than IQ scores for girls (Arden & Plomin, 2006). A typical study looking at 10-year-old children classifies participants by gender and by low, average, or high IQ.
Make a relative frequency histogram by using ten-point intervals to show the distribution of the scores.
The strength of the linear relationship between two numerical variables may be measured by the
State the formula for the test statistic and show your decision rule using the 1 percent level of significance. (c) Carry out the test. Show your work. (d) What assumptions are required?
The mean, median, and mode are the most common measures of dispersion (spread).
The last sample showed a mean and standard deviation of 3.55 and 0.08 inches, respectively. Using α = 0.05, the appropriate decision is?
Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
Is there a difference in the extent of wound healing by treatment? (Hint: Are treatment and the percent wound healing independent?) Run the appropriate test at a 5% level of significance.
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