A study of parental empathy for sensitivity cues and baby temperament (higher scores mean more empathy) was performed. Let x1 be a random variable that represents the score of a mother on an empathy test (as regards her baby). Let x2 be the empathy score of a father. A random sample of 36 mothers gave a sample mean of x1 = 69.72. Another random sample of 32 fathers gave x2 = 59.85. Assume that o, = 12.04 and o2 = 12.25. (a) Let u, be the population mean of x, and let u, be the population mean of x2. Find a 95% confidence interval for u - H2. (Use 2 decimal places.) lower limit upper limit (b) Examine the confidence interval and explain what it means in the context of this problem. Does the confidence interval contain all positive, all negative, or both positive and negative numbers? What does this tell you about the relationship between average empathy scores for mothers compared with those for fathers at the 95% confidence level?

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Chapter10: Statistics
Section10.1: Measures Of Center
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A study of parental empathy for sensitivity cues and baby temperament (higher scores mean more empathy) was performed. Let x1 be a random
variable that represents the score of a mother on an empathy test (as regards her baby). Let x, be the empathy score of a father. A random sample of
36 mothers gave a sample mean of x1 = 69.72. Another random sample of 32 fathers gave x2 = 59.85. Assume that o, = 12.04 and o2 = 12.25.
(a) Let u, be the population mean of x, and let u, be the population mean of x3. Find a 95% confidence interval for u1 - Hz. (Use 2 decimal
places.)
lower limit
upper limit
(b) Examine the confidence interval and explain what it means in the context of this problem. Does the confidence interval contain all positive,
all negative, or both positive and negative numbers? What does this tell you about the relationship between average empathy scores for
mothers compared with those for fathers at the 95% confidence level?
Transcribed Image Text:A study of parental empathy for sensitivity cues and baby temperament (higher scores mean more empathy) was performed. Let x1 be a random variable that represents the score of a mother on an empathy test (as regards her baby). Let x, be the empathy score of a father. A random sample of 36 mothers gave a sample mean of x1 = 69.72. Another random sample of 32 fathers gave x2 = 59.85. Assume that o, = 12.04 and o2 = 12.25. (a) Let u, be the population mean of x, and let u, be the population mean of x3. Find a 95% confidence interval for u1 - Hz. (Use 2 decimal places.) lower limit upper limit (b) Examine the confidence interval and explain what it means in the context of this problem. Does the confidence interval contain all positive, all negative, or both positive and negative numbers? What does this tell you about the relationship between average empathy scores for mothers compared with those for fathers at the 95% confidence level?
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