Test if there is a correlation between temperature and murders at the 5% level. Temperature 71,74,78,84,88,90,91,91,89,85,78,75 Murders 8,21,16,18,22,25,22,30,20,10,14,9

A psychologist has designed an index to measure the social perspectives of elementary school children. The index is based on ratings of a child’s responses to questions about a set of photographs showing different social situations. The following are the indices measured on a random sample of 16 children attending elementary school in a particular district. 48, 75, 69, 58, 60, 68, 59, 66, 71, 52, 49, 60, 54, 55, 70, 57 For the data the mean index is 60.69 and the standard deviation is 8.26. Perform a statistical test to determine if the population mean index is greater than 50. a) Name of hypothesis test: b) H0: c) HA: d) Test Statistic: e) Rejection region: f) Decision in the context of the problem:

The midterm and final exam grades for a statistics course are provided in the data set below. Jaymes, a student in the class, scored 86 on both exams. Treat the given data sets as samples. Midterm: 80, 78, 85, 82, 79, 79, 78, 86, 80, 84, 78, 84, 80, 84, 81, 78, 81, 82, 78, 84 Final: 81, 88, 68, 69, 69 81, 82, 86, 76, 71, 72, 68, 77, 86, 68, 83, 84, 71, 81, 87 z-score for midterm: 1.857 z-score for final: 1.181 Based on the z-scores calculated above, which of Jaymes's grades is more unusual, the midterm grade or the final exam grade? Select the correct answer below: A. The absolute value of the z-score for the final exam grade is greater than for the midterm grade, so the final exam grade is more unusual. B. The absolute value of the z-score for the midterm exam grade is less than for the final grade, so the midterm grade is more unusual. C. The absolute value of the z-score for the midterm exam grade is greater than for the final grade, so the midterm grade is more...

I need help with something regarding this problem. The National Sleep Foundation recommends that adults aged 18 to 64 get an average of 8 hours of sleep per night. A survey of sleep hours was taken during a Statistics class. The data is listed below: 4, 5, 5, 5, 5.5, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 10, 10 Do we have enough evidence at the 0.05 significance level to say that statistics students tend to get less sleep than the recommended average of 8 hours per night? How would I get the degrees of freedom?

Can you do a histogram for Class 0-0.19, 0.20-0.39, 0.40-0.59, 0.60-0.79,0.80-0.99, 1.00-1.19, 1.20-1.39, Frequencies 25, 13, 5, 2, 2, 2, 3.

if the outlier is removed, what is the mean of the remaining sample data? -8, -7, -5, 10, -7, -4, -4, -7, 6, 90

A psychologist has designed an index to measure the social perspectives of elementary school children. The index is based on ratings of a child’s responses to questions about a set of photographs showing different social situations. The following are the indices measured on a random sample of 16 children attending elementary school in a particular district. 48, 75, 69, 58, 60, 68, 59, 66, 71, 52, 49, 60, 54, 55, 70, 57 For the data the mean index is 60.69 and the standard deviation is 8.26. The confidence interval is 95%, with a level of significance of 0.05. Perform a statistical test to determine if the population mean index is greater than 50. a) Name of hypothesis test: b) H0: c) HA: d) Test Statistic: e) Rejection region: f) Decision in the context of the problem:

The mean age of two people in a room is 20 years. A 50 year old person enters the room. What is the mean age of the 3 people in the room now 20 30 33.3 35 none of the above

The following is a list of P/E ratios (current stock price divided by company's earnings per share) for 15 companies. 57, 53, 50, 46, 42, 35, 31, 56, 52, 37, 37, 34, 34, 30, 30 Send data to calculator Draw the histogram for these data using an initial class boundary of 29.5 and a class width of 9. Note that you can add or remove classes from the figure. Label each class with its endpoints. Frequency 9 8 7- 6+ S43N- 5 3+ 2- 0 I 0 I P/E ratio 0 " 0 0:00 ×ばつ Ś

Which one of the following data set has a mean of 70 and a median of 60? O 20, 60, 70, 80, 90, 100 O 40, 50, 60, 60, 80. 90 50, 50, 55, 65, 80,100 50, 55, 55, 65, 95, 100 31 SAMSUNG

Write up your results as you would see them in a research paper. Be sure that you include the means and standard deviations for each group in your write-up, as well as a sentence or two explaining the results