Question

In: Math

Dr. Smile is interested in evaluating whether 7-year-old autistic children differ from the general population of...

Dr. Smile is interested in evaluating whether 7-year-old autistic children differ from the general population of 7-year-old children in their ability to recognize facial expressions. She develops the Facial Recognition Test, which has mean = 200 among the general population of 7-year-olds. Dr. Smile collects data on a sample of 16 children with autism. In this sample Xbar = 180 and s = 12.

A) using alpha= 0.05 and a two-tailed test, conduct a one-sample t-test evaluating the null hypothesis.

b) based on these results, should Dr Smile reject or fail to reject the null hypothesis?

c)Report the resukts of the hypothesis test you conducted in part B as if Dr Smile were writing about them in a journal article.

Solutions

Expert Solution



Related Solutions

A psychologist is interested in knowing whether adults who were bullied as children differ from the...
A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms of their empathy for others. On a questionnaire designed to measure empathy, the mean score for the general population is 80.82. Random sampling of 76 scores obtained from individuals who were bullied yielded a mean of 66.42 and a standard deviation of 22.87. Suppose you want to calculate the 99% confidence interval.
A psychologist is interested in knowing whether adults who were bullied as children differ from the...
A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms of their empathy for others. On a questionnaire designed to measure empathy, the mean score for the general population is 30.6. Random sampling of 25 scores obtained from individuals who were bullied yielded a sample mean of 39.5 and a sample standard deviation of 6.6. Test at the .05 level of significance. Set up the criteria for making a decision....
Dr. Su is interested in whether males and females differ in their verbal ability. She selects...
Dr. Su is interested in whether males and females differ in their verbal ability. She selects 5 males and 5 females to participate in her study. She administers everyone a test of verbal ability (scores ranging between 0-20, higher scores represent higher ability). Here are the scores Males: 10, 10, 12, 12, 16 Females: 9, 12, 12, 15, 17 Set up non-directional hypotheses for the independent t-test. Provide the decision rule, illustrating with a drawing. Conduct an independent t-test, report...
Question Dr. Whistle was interested in evaluating whether her therapy for post-traumatic stress disorder (PTSD) was...
Question Dr. Whistle was interested in evaluating whether her therapy for post-traumatic stress disorder (PTSD) was effective for treating a group of trauma (abuse) survivors. Thirty-eight trauma survivors received three weeks of therapy and then completed a PTSD scale. Dr. Whistle’s research hypothesis is that the mean PTSD score for those receiving the therapy will be less than for the general population of trauma survivors (μ = 65, σ = 8). Use null hypothesis testing (all steps) to answer Dr....
In 2020, Dr. Chen’s daughter is 7-year old, and Dr. Chen is planning for his daughter’s...
In 2020, Dr. Chen’s daughter is 7-year old, and Dr. Chen is planning for his daughter’s college fund. He expects his daughter to start her college education at the age of 18, which is 11 years from now. The expected cost of tuition only for a 4-year college education in 2032 is $94,800 at a public, in-state university. The college fund is invested to gain investment returns. Dr. Chen is considering two investment options. The first is a mutual fund...
Which reflexes are most commonly retained in children with disabilities (different from the general population)?
Which reflexes are most commonly retained in children with disabilities (different from the general population)?
We are interested in determining whether husbands differ from their wives on weight loss after taking...
We are interested in determining whether husbands differ from their wives on weight loss after taking a weight loss supplement. To evaluate this, we need to conduct a(n): A. Independent samples t-test (*this was incorrect*) B. Dependent samples t-test C. One sample t-test D. Any of these would be appropriate My next best guess would be a one sample t-test but I am not sure anymore
Psychiatrist, Dr. Susan Beck examined T.D. Chang, 52 year old professor , married with 2 children...
Psychiatrist, Dr. Susan Beck examined T.D. Chang, 52 year old professor , married with 2 children for only 15 to 20 minutes. Dr. Brunetti wanted her to tell him how Mr. Chang might respond to the news that he has prostate cancer. Dr. Brunetti does not want to tell him what is suspected and what he might have unless it is absolutely necessary. Dr. Beck disagrees. Should Mr. Chang be informed of his condition, the possibilities and the reason for...
7. A biologist was interested in determining whether sunflower seedlings treated with an extract from Vincaminor...
7. A biologist was interested in determining whether sunflower seedlings treated with an extract from Vincaminor roots resulted in a lower mean height of sunflower seedlings than the standard height of 15.7 cm. The biologist treated a random sample of n = 33 seedlings with the extract and subsequently obtained the a sample mean of 15.664 cm and a sample standard deviation of 2.544 cm. Test the claim that the mean height is less than 15.7 cm. Fill in the...
You are a 35-year-old married individual with 2 children (ages 7 and 9). You are the...
You are a 35-year-old married individual with 2 children (ages 7 and 9). You are the primary source of family income with an annual income of $80,000. You are considering buying life insurance policy(s) to make sure, in case of your premature death, that your spouse has money to survive without you and they are able provide your children with college tuition needs. You would also like this policy to provide some form of savings/investment accumulation so that at some...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT