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Question 1: Find the mean and standard deviation of the number of cars that have more than 1 passenger among the 500 cars stopped at a cordon-point for a survey. Assume that 5% of all cars have multiple passengers (compared to driver-only cars).
Question 2: The mean age for men to purchase their first home is 38 years. If the standard deviation is assumed to be 3.2 years, find the probability that a random sample of 40 men would show a mean age less than or equal to 37 years.
Prepare a frequency distribution from data given below that describes how long it took a person to drive to work in work week.
The standard deviation of the sample was 1.7 years. Using the 0.95 degree of confidence, what is the confidence interval within which the population mean lies?
Tthe mean change score for the sample studied is an increase of 5.2. What is considered a medium effect size for a t test for dependent means?
Write the claim mathematically and identify H0 and Ha (b)Find the critical value(s) and identify the rejection region(s). (c) Find the standardized test statistic.
In a survey conducted to see how long Americans keep their cars, 2000 automobile owners were asked how long they plan to keep their present cars. The results of the survey follow. Find out the probability distribution associated with these data.
What is the probability of randomly selecting a person who is conservative and then selecting from that group someone who is a nursing major?
The strength of the linear relationship between two numerical variables may be measured by the
An experiment was conducted to determine the effects of three different pesticides (P1,P2,P3) on the yield of three different varieties of citrus tree (V1,V2,V3).
Confidence Intervals around a Population Parameter Never preferred but is accepted as a Trade off for cost and/or time. Dataset Accuracy Confidence Example Preference?
Use the t-distribution table to find the critical values for the indicated alternative hypothesis, level of significance, a and sample size n1 and n2. Assume that the sample are independent, normal and random. Ha: u1
At a =.02 , is the number of sticks of gum a person chews per day actually greater than 8? Use the traditional method of hypothesis testing.
The resulting list of twenty values has a mean of 4.4 and a standard deviation of 4.2. Construct a 99% confidence interval to estimate the difference between the mothers and fathers.
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