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Question 5
A survey of fruit preference of northern and southern Australians was carried out.Researchers were interested to know whether Australians living in northern areas were more interested in tropical fruit because it was plentiful, as opposed to citrus and other fruit. A survey of 500 persons was carried out and the results are given below. Perform a χ2 test to see whether fruit preference and location in Australia are independent. Use a significance level of α= 0.05.
a. State the hypotheses that you are testing
b. Determine the critical value of χ2 and your decision rule
c. Calculate the χ2 test statistic for this data. (Show all workings)
d. State your decision and conclusion.
suppose an electronics store receives a shipment of 30 graphing calculators.a how many different ways can the store
Report descriptive statistics, assumptions tests, effect sizes (partial eta) as well as tests of statistical significance.
Find the least-squares regression equation of Y on X1 and X2 and interpret the results of part a.
1.a manufacturer of infant formula is running an experiment using the standard control formula and two new formulas a
Males had a mean cholesterol level of 195 and a standard deviation of 10. If the campus was equally divided between males and females, how many males on this campus would be at increased risk?
From the scatterplot of monkey call response against pure-tone response in Figure 7.6 what would you estimate the correlation r to be?
an engineer is going to redesign an ejection seat for an airplane. the seat was designed for pilots weighing between
1. A zero-mean Gaussian random signal has the autocorrelation function of the form γX(τ) = 10e-0.1|τ| cos 2πτ. Write the covariance matrix for the signal sampled at four time instants separated by 0.5 seconds.
For both airlines, (recall you already collected data on one airline in Module 1 and an additional airline as part of this assignment), construct 95 percent confidence intervals (alpha would equal what in this case?) for monthly load factors, mont..
Construct a 95% confidence interval to estimate the population mean with a sample mean = 110 and ? = 30 for the following sample sizes:
you wish to test the claim that u gt 11 at a level of significance of ? 0.05 and are given sample statistics n 50
The viscosity (y) of an oil was measured by a cone and plate viscometer at six different cone speeds (x). It was assumed that a quadratic regression model was appropriate, and the estimated regression function resulting from the n = 6 observations..
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