Suppose 90% percent of kids who visit a doctor have a fever, and 45% of kids with a fever have sore throats. What’s probability that a kid who goes to…
Month: December 2014
Problem 412
A study found that 40% of the assisted reproductive technology (ART) cycles resulted in pregnancies. Twenty-three percent of the ART pregnancies resulted in multiple births. (a) Find the…
Problem 411
The table shows the result of a survey in which 143 men and 145 women workers ages 25 to 64 were asked if they have at least one month’s…
Problem 410
A travel association claims that the mean cost for two adults traveling together on vacation in 115. A random sample of 25 such groups adults has a mean daily…
Problem 409
A county is considering the speed limit on a road because they claim that the mean speed of vehicle is greater than 50 miles per hour. A random sample…
Problem 408
As part of your work for an environment awareness group, you want to test the claim that the mean waste generated by adults in the country is more than…
Problem 407
An environmentalist estimates that the mean waste recycled by adult in the country is more than 1 pound per person per day. You want to test this claim. You find…
Problem 407
A nutritionist claim that the mean tuna consumption by a person is 3.7 pounds per year. A sample of 75 people shown that the mean tuna consumption by a…
Problem 406
A random sample of 70 eighth students’ scores on a national mathematics assessment test has a mean score of 295 with a standard deviation of 45. This test result…
Problem 405
Determine whether to reject or fail to reject at the level of significance of (a) α = 0.06. (b) α = 0.09. ;µ = 110,: µ ≠ 110, and P…
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