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48% of teenagers play games. A random sampe of 60 teenagers is drawn find the probability that the proportion of teenagers in the sample who play games is less than 0.489
Calculate the Regression for Abortion Restrictions and Church Attendance
What were the social,political and economic motives of european in initiating slavery and trans-altantic slave trade?
The average height of a particular plant is known to be 78 cms. The average height of 20 plants to which a particular manure was applied was found to be 85 cms.
Standard deviation equal to 500 and 50 hours, respectively. Find the probability that a random sample of 15 bulbs will have an average life of less than 475 hours.
Once production is set up, 80 units can be produced per day. Daily demand rate for the units is 60 per day. a. What is the most economical number to produce per production run? b. How long is each production cycle?
Compute the probability that a random sample of 50 infants born at full term results in a sample mean of less than 3500 grams.
What is the standard deviation for the number of accessory sales? Express your answer to two decimal places.
Speed of light. In 1882 Michelson measured the speed of light (usually denoted c as in Einstein's famous equation ).
Sixteen batteries are tested to see if they last as long as the manufacturer claims. Four batteries fail the test. Two batteries are selected at random without replacement. Find the probability that at least one battery fails the test.
the height of woman ages 20-29 is normally distributed with a mean of 64.4 inches. assuming the standard diviation
The mean salary paid to 1000 workers of an industry was found to be Rs. 130, 40. Later on it was discovered that the salary of the two employees was wrongly entered as Rs. 297 and 165. Their correct salaries were Rs. 197 and 185. Find the correct ..
In past elections, the representative received 40 percent of the popular vote in that area of the state. She doubts whether it has changed much. How many registered voters should be sampled?
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