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A random sample of size 9 is collected from a normally distributed random variable. The sample mean is 6.507 and the sample variance is 3.99. An exact 80% confidence interval for the mean of the random variable is required.How should you calculate confidence interval using quantiles from a t-distribution and with how much degree of freedom? Is it approprait to use in calculating the confidence of interval quantiles from a normal distribution?Explain and show work.
A random sample of 8 recent batches produced the following yields. Conduct a hypothesis test to determine whether the true mean yield has decreased. Use an a=0.01
Indicate which would be the independent variable and which would be the dependent variable in each of the following:
Calculate the chi-square statistic χ2 to determine if there is enough evidence to conclude that the number of minutes spent online per day is related to gender.
derive expression of slope at support and deflection at centre of simply supported beam with centre load
Assume that a lot from product 5% non-conforming is submitted. Using Poisson Distribution compute the approximate probabilities that: the lot will be accepted and still in a reduced inspection.
A manufacturer produces a batch of memory chips (RAM) and measures the mean-time-between-failures (MTBF). The manufacturer then changes a manufacturing process and produces another batch and again measures the MTBF
1.a statistics instructor wants to know which route will get her to school the fastest. each day from october 2 to
gender of childrena. if a couple plans to have eight children find the probability that they are all od the same
A new teaching tool developed by the Allied Health department is claimed to help 68% of students learn at a faster pace. State the null and alternate hypothesis if:
A box of 9 gloves contains two left handed gloves and seven right handed gloves. If two gloves are randomly selected from the box, without replacement, what is the probability that both gloves will be right handed?
The true average gas mileage for this new model, which of the following gives the null and alternative hypotheses that the consumer group should test?
Make a stem plot for the men height data. Calculate the five-number summary for the women.
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