What is the probability that a transistor of this type will last at most 50 weeks? b. What is the probability that a transistor of this type will not survive the first 35 weeks?

2. A plastic casting for a magnetic disk is composed of three parts, A, B, and C. The thickness of each part is normally distributed with a mean of 2 millimeters, and a standard deviation of 0.1 millimeter and the parts are independent. Calculate the probability that the total thickness (A+B+C) exceeds 6.5 millimeters.

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Suppose that the walking step lengths of adult males are normally distributed with a mean of 2.4 feet and a standard deviation of 0.5 feet. A sample of 35 men’s step lengths is taken.   Step 1 of 2 :   Find the probability that an individual man’s step length is less than 1.9 feet. Round your answer to 4 decimal places, if necessary.

Assume that hybridization experiments are conducted with peas having the property that for offspring, there is a 0.75 probability that a pea has green pods. Assume that the offspring peas are randomly selected in groups of 12. Complete parts(a) through (c) below. A. Find the mean and the standard deviation for the numbers of peas with | green pods in the groups of 12. The value of the mean is µ = peas %3D B. use the range rule of thumb to find the values separating results that are significantly low or high Values of peas or fewer are significantly low Values of peas or greater are significantly high C. Is result of 1 peas with green pods a result that is significantly low? peas The results significantly low, because 1 peas with green pods is

Suppose that the walking step lengths of adult males are normally distributed with a mean of 2.8 feet and a standard deviation of 0.4 feet. A sample of 74 men’s step lengths is taken.   Step 1 of 2:  Find the probability that an individual man’s step length is less than 2.3 feet. Round your answer to 4 decimal places, if necessary

Suppose that the life expectancy of a certain brand of nondefective light bulbs is normally​ distributed, with a mean life of 1300 hr and a standard deviation of 50 hr. If 60,000 of these bulbs are​ produced, how many can be expected to last at least 1300 ​hr?

Suppose that the walking step lengths of adult males are normally distributed with a mean of 2.32 feet and a standard deviation of 0.40 feet. A sample of 83 men’s step lengths is taken.   Step 1 of 2 :   Find the probability that an individual man’s step length is less than 2.1 feet. Round your answer to 4 decimal places, if necessary.

1. Assume that IQ are normally distributed with a mean of 100 and standard deviation of 15. For a sample of 25 adults, find the probability that their mean IQ score will be greater than 90?

Suppose that a plumb of 1kg is repeatedly weighed to find the characteristics of a balance. The measured weights are known to follow a normal distribution with a mean of 1kg and a standard deviation of 50g. Now, we want to examine the characteristics of the data generated by the repeated measurements. Answer the following question using the 68-95-99.7 rule. Round from the 3rd to the 2nd decimal place. Find the probability that the measured weight is between 0.95kgand 1.1kg.