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A producer of various kinds of batteries has been producing "D" size batteries with a life expectancy of 87 hours. Due to an improved production process, management believes that there has been an increase in the life expectancy of their "D" size batteries. A sample of 36 batteries showed an average life of 88.5 hours. Assume from past information that it is known that the standard deviation of the population is 9 hours. Give the null and alternative hypotheses. Compute the test and p-value. Use a=0.01 to make your conclusion based on the p-value.
What is the probability that 30% or fewer male employees will indicate that they have to pick up the slack for mom's working flextime ?
Your financial advisor sees this and tells you there is a 100% chance XYZ stock will gain over the 2-month period. Would you continue to use this financial advisor? Explain.
Construct a 95% confidence interval estimate for the population proportion of administrative professionals who prefer cash bonuses.
What is an appropriate sample space for this experiment?
Can you provide another explanation for this one: Zc/Tc for 86% confidence interval when the sample size 50?
A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population with a mean of µ = 80 and a standard deviation of σ = 20. The researcher expects a 12 point treatment effect and plans to use a ..
Use the Empirical Rule to estimate the proportion of costs within two standard deviations of the mean. What are these limits?
In a test of a gender-selection method, 14 babies are born and 10 of them are girls. Find the number of different possible sequences of genders that are possible when 14 babies are born
Provide free: fax assistance for the residents of this city, use the binomial approximation to the hyper geometric to find the probability that at least 3 women arc selected.
Assume x is normally distributed with mean u=15 and standard deviation 0=3. Use the approximate areas beneath the normal curve, as discussed in this section, to answer the following questions.
Use analysis of variance to test any differences in mean glue strengths.
Process data by Excel using its two-way ANOVA without replication program.
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