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Use a chi X2-test to test the claim sigma squared equals 0.42 at the alpha equals 0.10 significance level using sample statistics s squared equals 40.6 and n equals 17. Assume the population is normally distributed.
a) Identify the null and alternative hypotheses.
b) Identify the test statistic.
c) Identify the critical? value(s).
d) Choose the correct conclusion below.
Estimate the value of torque required when the diameter is 16 mm. Calculate coefficient of correlation between these variables and comment on your prediction.
Q1.The life of cell batteries is normally distributed with a mean of 88.2 hours and a standard deviation of 15.5 hours. 93% of the batteries will last more than how many hours? (2 decimal places )
A local business knows that 30% of their customers use a credit card to pay for their purchase. Suppose a sample of 85 customers is selected.
What is the probability that a randomly selected adult regularly consumes both coffee and soda? What is the probability that a randomly selected adult doesn't regularly consume at least one of these two products?
Specify the explanatory and response variables, and explain whether confounding variables were likely to be a major problem in interpreting the results. Be sure to include the news article with your response.
the monthly earnings of computer programmers are normally distributed with a mean of 4000. if only 1.7 of programmers
In a certain city of several million people, 7.8% of the adults are unemployed. If a random sample of 205 adults in this city is selected
If Rambles sells 10 units less than break even, how much loss would the company recognize on its income statement?
Compute the 95% confidence interval of the mean direction estimates. Compute the concentration parameter for both measurement sets.
recently research physicians at mountain states have developed a surgery process they believe will reduce the average
The data show the percentage of residents with bachelor's degrees in the 50 states and Washington, DC.
The mean of a set of 7 numbers is 13. What is the sum of the numbers? Find the mode of the following test scores: 89, 78, 91, 82, 75, 89, 84, 95, 89, 93
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