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A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 875 hours .A random sample of 58 light bulbs has a mean life of 852 hours with a standard deviation of 95 hours. Do you have enough evidence to reject the manufacturer's claim? Use a = 0.09.
A. Identify the null hypothesis and alternative hypothesis.
B. Identify the critical value (s). Use a comma to separate answers as needed
C. Identify the standardized test statistic.
D. Decide whether to reject or fail to reject the null hypothesis.
Time to help a stranger was investigated by a group of undergraduate psychology majors as a part of their Introduction to Research Methods course.
there are 6 different colored kittens at the pet store brown white black calico orange and gray. if annies family wants
State the decision rule for .05 significance level. (Round your answer to 3 decimal places.)
the arrival of cars at a toll booth can be modeled by a poisson pro- cess. between 1100am and 1200pm cars arrive at an
A silver dollar is flipped twice. Calculate the probability of each of the following occurring:
Based on a simple random sample of one hundred an analyst estimates the average hourly wage earned by workers in a city to be $30 and computes the margin of error to be $5.
The amount of income spent on housing is an important component of the cost of living. The total costs of housing for homeowners might include mortgage payments, property taxes, and utility costs (water, heat, electricity).
There are three types of bread, three types of meat, three types of cheese, and four types of topping. How many different sandwiches can the restaurant make?
Using the Hypothesis Tests Two Sample file and a .05 significance level, test whether there is a difference in the mean salary for men versus women.
a what are the control limits for x-bar control charts with alpha 0.002 probability limit and sample size of 4?b
What is the probability that the value of the average score for this sample will lie in the internal 970 and 1030? Assume that the population distribution is normal.
Formulate and solve a 0-1 integer linear program model that can be used to find the minimum number of locations necessary to provide coverage to all areas. Clearly indicate your linear program model.
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