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To test the comparative brightness of two red dyes, nine samples of cloth were taken from a production line and each sample was divided into two pieces. One of the two pieces in each sample was randomly chosen and red dye 1 applied; red dye 2 was applied to the remaining piece. The following data represent a "brightness score" for each piece.
Sample 1 2 3 4 5 6 7 8 9
Dye 1 10 12 9 8 15 12 9 10 15
Dye 2 8 11 10 6 12 13 9 8 13
a. Is there sufficient evidence to indicate a difference in mean brightness scores for the two dyes? Use α = 0.05.
b. Find the approximate p-value for the test and interpret its value.
a baseball player would like to conduct an experiment to determine how the weight of his bat the speed of a pitch and
a deck of ordinary cards is shu?ed and 13 cards are dealt. what is the probability that the last card dealt is an
The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard deviation of 4.45 pages.
State the null and alternative hypothesis if the average electric bill for residents of White Pine Estates exceeds $52.98 per month.
Birth weights of babies in the United States can be modeled by a normal distribution with mean 3250 grams (7.165 pounds) and standard deviation 550 grams (1.213 pounds). Those weighing less than 2500 grams (5.512 pounds) are considered to be low b..
a group of 10 people begin a chain letter with each person sending the letter to four other people. each of these
the probability that a person will have 01 or2 dental checkups per year is 0.3 0.6 and 0.1 respectively. if seven
For a sample of 12 items from a normally distributed population for which the standard deviation is s=17.0, the sample mean is 230.8. At the 0.05 level of significance
Here are heart rates for a sample of 30 students before and after a class break. At alpha =.05, was there a significant diffeence in the mean heart rate?
NBC TV news, in a segment on the price of gasoline, reported last evening that the mean price nationwide is $1.50 per gallon for self-serve regular unleaded.
Calculate a value of lambda using the data from last week concerning the news networks and the reporting practices. Compare your resulting lambda to the resulting chi-square from last week.
What is the probability that a consumer buys a can whose contents are actually less than the stated weight of 16 oz.?
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