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Pregnant? Suppose that 70% of the women who suspect they may be pregnant and purchase an in-home pregnancy test are actually pregnant. Further suppose that the test is 98% accurate. What is the probability that a woman whose test indicates that she is pregnant actually is?
write a null and alternative hypothesis for the following research question is the amount of time australian children
Recall the St. Petersburg game. It starts at $2. Toss a coin and if a head appears, the pot doubles. If tails appears, you win the pot at that time and the game ends. So, if you get H, H, H T, you win $16. The payoff table is,
The power transmission cable has a weight per unit length of 15 lb/ft . If the lowest point of the cable must be at least 90 ft above the ground, determine the maximum tension developed in the cable and the cable's length between A and B
Your office has just received 140 insurance claims to be processed in the next few days. Find the following probabilities.
Togetherness. Are good grades in high school associated with family togetherness? A random sample of 142 high school students was asked.
the diameters of a new species of apple have a bell-shaped distribution with a mean of 7.26cm and a standard deviation
What is the probability of randomly sampling 140 women 16 years of age or older and getting 35 or more who do volunteer work? What is the probability of getting 21 or fewer from this group?
According to the historical data, the life expectancy in Germany is less than or equal to the life expectancy in the United States. A new study has been made to see whether this has changed.
What id Steve's grade point average at graduation and what is Steve's median grade point at graduation
Prior to installing the new system, company analysts determined that the incoming calls to the system are Poisson distributed with a mean equal to two.
The failure times (in hours) of the six diodes are 530, 590, 670, 700, 720, and 780. Estimate the mean time to failure of the diodes as well as the failure rate. Find a 95% confidence interval for the mean life.
In a group of college students there are 200 women, 10 of whom smoke. There are 150 men, 32 of whom smoke. Calculate the probability a randomly selected student is a woman or a smoker.
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