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Q1) From random sample of 1201 Americans, it was discovered that 62 of them lived in neighbourhoods with improper levels of carbon monoxide.
i) Determine the point estimate? Give the symbol and value.
ii) Create a 99% confidence interval for proportion of all Americans who live in a neighbourhood with improper levels of carbon monoxide
iii) What sample size would be required for estimate to be within 1.5 percentage points with 99% confidence if you used estimate of that was earlier obtained.
iv) If you wanted your confidence level to be 95%, would your sample size be larger or smaller?
Describe the sampling distribution of the sample mean.
Suppose that past data are not available for developing a planning value for p; therefore, you will use p = 0.050 for the planning average.
Use this information to construct a probability table, and then calculate each of the following probabilities: P(foreign car)
Claculate the exponential also adjusted exponential smoothing forecast and linear trend forecasting. The hotel has experienced the following occupancy rates for the past 9 years.
An experiment was carried out to assess the effects of four tomato varieties and four planting densities on yield. There were 64 plots, and each of the 16 factor combinations was randomly assigned to 4 plots. A partial ANOVA table
Which statement is true for a statistical study?
What is the probability that a cereal would either high calorie or high fiber? In other words, what is P(high calorie or high fiber)?
Solve problem graphically1. Describe optimal solution and objective function value in context of the problem.
We are interested in testing to find out whether the variance of the population is vitally more than 0.003
At the .05 level of significance, can we conclude that those joining Weight Reducers on average will lose less than 10 pounds? Determine the p-value.
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location. Research question: At α = . 05, does vehicle type vary by mall location?
A newspaper reports have 58 percent of farmers are planning to plant genetically modified crops presesnt year. The article adds that the poll is based on a random sample.
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