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A mortgage broker is offering home mortgages at a rate of 9.5% but is fearful that this value is higher than many others are charging. A sample of 40 mortgages filed in the county court house shows an average of 9.25% with a standard deviation of 8.61%. Does this sample indicate a smaller average? Use α = 0.05 and assume a normally distributed population.
A) Yes, the test statistic falls in the rejection region.
B) No, the test statistic falls in the acceptance region.
C) Yes, because the test statistic is greater than -1.645.
D) No, because the test statistic is -1.85 and falls in the rejection region.
She is interested in testing the null hypothesis that the mean SAT score is the same for each type of schooling using the one-way ANOVA. Some summary statistics for the three groups are given below, followed by the one-way ANOVA table.
Find the probability of winning jackpot?
As it is a 2 _ 2 table, try also two-tailed two-sample z test for ð1 = ð2 and verify that z2 is same as your chi-square statistic. Which test do you favour? Describe why?
Does this sample indicate a smaller average? Use α = 0.05 and assume a normally distributed population.
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How closely is the height of an individual related to the weight? Partial regression output for a sample of 92 individuals is below.
Make up a scatter diagram with 10 dots for each of the following situations:
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At.02 significance level is it sensible to conclude that mean number of shoes sold at mall stores is larger than at outlet stores?
This model is fit to the data using the method of least squares using statistical software, and the following parameter estimates and their standard errors are obtained.
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