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Q1) A sample of 40 observations is chosen from one approximately normal population. Sample mean is 102 and sample standard deviation is 5. Sample of 50observations is chosen from second source. Sample mean is 99 and standard deviation is 6. Perform a hypothesis test by using.04 level of significance to find out if there is a difference between the population means.
Q2) In recent national survey, mean weekly allowance for 9-year-old child from his or her parents was reported to be= $3.65. Random sample of 45 nine year-olds in north western Ohio disclosed mean allowance to be= $3.69 with standard deviation of= .24. At.05 level of significance, is there difference in mean allowances nationally and mean allowances in north western Ohio for 9 year-olds?
What percent of trucks logged more than 57,060 but less than 58,280 miles? What percent of Fords travelled 62,000 miles or less in the year?
Can we conclude that mean time for game is less than 3.50 hours? Use.05 significance level.
For the data shown below, prepare a x-bar chart. Note that the sample size is three. Record the values for the UCL, center line, and LCL. In addition, note any points that are out of control.
Using part(a), explain to investor differences between distribution of performance figures for the 2 kinds of stock funds.
The accompanying two histograms represent the distribution of acceptance rates (percent accepted) among 25 business schools in 1995. The histograms use different class intervals, but are based on the same data. In each class interval, the left endpoi..
A busy landscaping supplies company sells wood chips for garden mulch. The mulch is sold by the cubic metre and delivered to households in a small truck.
MATH1550H: Assignment: Question: Experience shows that X, the number of customers entering a post office during any period of time t, is a random variable the probability mass function of which is of the form
Suppose we wish to predict the crawling age of a particular baby when the average outdoor temperature is 25°F six months after birth.
What is the probability that they all hit the target?
Determine the probability of exactly one success given Poisson distribution with mean of 2.0.
A company makes molded plastic toys. They study the plastic injection process into the molds. A common cause of variation and What are the control limits for an chart
Which of the following would have a binomial distribution and evaluate the binomial coefficient
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