ariances are not equal. Assume the samples are random and independent, and the populations Dogs = $214 X2 = $179 Cats S1 = $32 $2 = $28 n, = 18 n2 = 8 YA. "The mean annual costs of food for dogs and cats are equal." OB. "The mean annual cost of food for dogs is greater than the cost for cats." O C. "The mean annual costs of food for dogs and cats are not equal." O D. "The mean annual cost of food for cats is greater than the cost for dogs." hat are H, and H, ? he null hypothesis, Ho, is µ1 = H2. The alternative hypothesis, H, is µy # H2. /hich hypothesis is the claim? O The alternative hypothesis, H,
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
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