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Liste below are the heights of fathers and sons. Find the value of r, and use a significance level of 5% to determine whether there is a significant linear correlation between the heights of fathers and those of their sons
height of father= 70, 69, 64, 71, 68, 66, 74
height of son= 62.5, 64.6, 69.1, 73.9, 67.1, 64.4, 71.1
a web based software company is interested in estimating the proportion of individuals who use the firefox browser. in
a. Determine the sample proportion, p, of households with cellular telephones that can be used to access the Internet. b. If the population proportion is 0.40, determine the standard error of the proportion.
in order to compare failure rates for two brands of tires a sample of 600 tires of brand a was taken of which 36
Identify the null hypothesis, alternative hypothesis, test statistic, p-value or critical value, and the conclusion about the null hypothesis. Use the P-value method.
The mean amount purchased by a typical customer at Churchill's Grocery Store is $23.50 with a standard deviation of $5.00. Assume the distribution of amounts purchased follows the normal distribution. For a sample of 50 customers, answer the follo..
Using test data on 20 types of laundry detergent, an analyst fitted a regression to predict CostPerLoad (average cost per load in cents per load) using binary predictors.
How many commercials' worth of data do I need to have a margin of error no more than 3, the correct set of hypotheses
h.g. wells once said statistical thinking will one day be as necessary for efficient citizenship as the ability to read
a tire manufacturer guarntees that the mean life of a certain type of tires is at least 35000 miles.a. state the null
Compute the 95% confidence interval on the population mean if a sample of 1000 is taken and the sample mean is found to be 15.95 and standard deviation is 4.2.
byers and williams 1987 studied the impact of temperature the independent variable on the viscosity the response of
Perform all pairwise comparisons among the three programs, using a Tukey adjustment and an overall significance level of 0.05, then interpret all your results.
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