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Suppose IQ were obtained from randomly selected couples. For 20 such pairs of people, the linear correlation coefficient is 0.902 and the equation of the regression line is y^ = - 0.64 + 0.99x, where x represents the IQ score of the husband , also the 20 x values have a mean of 100.61 and the 20 y values have a mean of 98.75. What is the best predicted IQ of the wife, given that the husband has an IQ of 105 ? Use a significance level of 0.05.
The best predicted IQ of the wife is ? (round to two decimals places as needed)
Suppose you bid $12000. What is the probability that your bid will be accepted?
Recognize and describe potential threats (up to 3) to internal validity.
The mean time to download an Google video is 1 minute 30 seconds. Suppose the download time is normally distributed with standard deviation of 20 seconds.
The distribution of lifetimes for a certain type of light bulb is normally distributed with a mean of 1000 hours and a standard deviation of 100 hours. Find the 33rd percentile of the distribution of lifetimes.
Determine the point estimate? Give the symbol and value.
Assume that you choose a 50 families sample. Which is the form expected from the distribution of the average or median of the sample?
What effect has the transformation had on the lowest exam mark and what effect has the transformation had on the highest exam mark - STATS 201/8 Data Analysis
You are estimating the cost ($K) of optical sensors based on the power output of the sensor. Using the preliminary calculations from a data set of 8 sensors, determine the equation of the line. (Round your intermediate calculations to 3 decimal pl..
Find out the probability distribution of blood types by gender in the group of 1000 individuals.The table below gives the distribution of blood types by gender in a group of 1000 individuals.
A multiple regression equation for list price of homes in certain community in USA is=170,000 -850 X 1 + 28,000 X 2 , where X 1 signifies age in years and X 2 signifies number of rooms.
The null hypothesis is to be tested at the 10% level of significance. The critical value from the table is:
An element E has a constant failure rate λ and a reliability at time t of R(t)=p, if p=0.5 and 0.9, what is the effect on Rs(t), basic reliability, serial Mean Time Between Failure, hs(t), MTBFs if additional elements are added to the baseline sys..
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