4. Spring break can be a very expensive holiday. A sample of 90 students is surveyed, and the average amount spent by students on travel and beverages is $601.00. The sample standard deviation is approximately $394.34. Construct a 95% confidence interval for the population mean amount of money spent by spring breakers. Draw graph.
In: Statistics and Probability
After hearing of the national result that 44% of students engage in binge drinking (5 drinks at a sitting for men, 4 for women), a professor surveyed a random sample of 300 students at his college and found that 118 of them admitted to binge drinking in the past week. Should he be surprised at this result? Explain.
In: Statistics and Probability
3. Test the null hypothesis that the mean rating of Trump by profs is greater than or equal to the mean rating of Trump by students. Use .10 significance level, a one tail test and the following data:
sample profs students
Mean 21 25
Variance 48 45
number 16 9
In: Statistics and Probability
On an examination in Biochemistry 12 students in one class had a mean grade of 78 with a standard deviation of 6, while 15 students in another class had a mean grade of 74 with a standard deviation of 8. Using a significance level of 0.05, determine whether the first group is superior to the second group.
In: Statistics and Probability
Mr.? Swope's high school biology students are learning to use a dichotomous key to identify fish. As you observe his? teaching, think about his applications of constructivist principles.
Using a constructivist? perspective, explain why Mr. Swope does not give students answers to their questions right away.
In: Psychology
This function will receive a list of elements with duplicate elements, this function should remove the duplicate elements in the list and return a list without duplicate elements. The elements in the returned list must be in the same order that they were found in the list the function received. A duplicate element is an element found more than one time in the specified list.
JAVA
In: Computer Science
A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of 61 students using Method 1 produces a testing average of 88.6A sample of 111111 students using Method 2 produces a testing average of 64.9 Assume that the population standard deviation for Method 1 is 14.68, while the population standard deviation for Method 2 is 5.52. Determine the 90%90%confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2.
Step 1 of 3:
Find the point estimate for the true difference between the population means.
Step 2 of 3:
Calculate the margin of error of a confidence interval for the difference between the two population means. Round your answer to six decimal places.
Step 3 of 3:
Construct the 90% confidence interval. Round your answers to one decimal place.
In: Statistics and Probability
. A school is interested to see if building a new and
bigger library would be something students would want, as the
current library is very small and has limited seating. Over the
past 5 yrs there are an averaged of µ=100 students per day
that visit the library but the standard deviation is unknown. The
student population from out of town has increased and therefore the
researcher feels it is likely that more students are frequenting
the library to study and socialize. She takes a sample of different
days and times over the course of one month to try to see the
activity level of students visiting the library typically. The
current sample is M=125 with a standard deviation of S=10. n=100
.Please run the proper t test and interpret the answer. Use the 4
steps we have been doing in class to be sure to answer all parts of
the question.
PLEASE HAND ONE SAMPLE T. TEST
In: Statistics and Probability
The college Physical Education Department offered an Advanced First Aid course last summer. The scores on the comprehensive final exam were normally distributed, and the z scores for some of the students are shown below.
| Robert, 1.00 | Juan, 1.67 | Susan, –2.16 |
| Joel, 0.00 | Jan, –0.71 | Linda, 1.68 |
(a) Which of these students scored above the mean? (Select all that apply.)
| Robert | |
| Joel | |
| Jan | |
| Juan | |
| Susan | |
| Linda |
(b) Which of these students scored on the mean? (Select all that apply.)
| Robert | |
| Joel | |
| Jan | |
| Juan | |
| Susan | |
| Linda |
(c) Which of these students scored below the mean? (Select all that apply.)
| Robert | |
| Joel | |
| Jan | |
| Juan | |
| Susan | |
| Linda |
(d) If the mean score was μ = 154 with standard deviation σ = 24, what was the final exam score for each student? (Round your answers to the nearest whole number.)
| Robert | |
| Joel | |
| Jan | |
| Juan | |
| Susan | |
| Linda |
In: Statistics and Probability
An organization monitors many aspects of elementary and secondary education nationwide. Their 1999 numbers are often used as a baseline to assess changes. In 1999 15 % of students had not been absent from school even once during the previous month. In the 2003 ?survey, responses from 8340 randomly selected students showed that this figure had slipped to 14 %. Officials would note any change in the rate of student attendance. Answer the questions below. ?
(a) Write appropriate hypotheses.
Upper H 0 : The percentage of students in 2003 with perfect attendance the previous month is (______)
Upper H Subscript Upper A Baseline : The percentage of students in 2003 with perfect attendance the previous month is (-______) 15%.
?(b) Check the necessary assumptions and conditions.
The independence assumption is(____)
The randomization condition is(____)
The? 10% condition is (___)
The? success/failure condition is(____0
?(c) Perform the test and find the? P-value. ?P-valueequal (-------) ?(Round to three decimal places as? needed.)
In: Statistics and Probability