10. Pick A Ball
In the game of Pick-A-Ball, there are 10 colored balls: 2 red, 4 white, and 4 blue. The balls have been placed into a small bucket, and the bucket has been shaken th Aplia: udent Question ked to reach into the bucket without.
100 cities were surveyed to determine sports teams. 23 had soccer, 26 had football, 22 had volleyball, 12 had soccer and football, 10 had soccer and volleyball, 15 had football and volleyball. 6 had all three.
How many had only football?
How many had.
103 parts made from alloy 1 and 47 parts made from alloy 2 were subjected to stress tests. 17 parts from alloy 1 and 15 parts from alloy 2 did not pass the test. Can we reject the hypothesis that the proportion of nonpassing parts from alloy 1 is at.
11. Describe 2 alternates when a span is too long to be accomplished with a sawn timber beam.
12. List 2 advantages and 1 pitfall of Platform Frame.
13. How is a platform frame anchored to a concrete or masonry foundation? Explain why.
.
10. Two separate samples receive different treatments. After treatment, the first sample has n = 9 with SS = 462 , and the second has n = 7 with SS = 420 . Compute the pooled variance for the two samples. Calculate the estimated standard error for the sample mean.
11. Imagine you're a researcher and you need to perform a one-sided test of an alternative hypothesis. You decide to conduct a significance test at the .05 level. Which of the following ranges of z-scores would make the test statistic significant at .05 (one-tail) but not at .01?
.
10. A random sample of 10 observations was selected from a normal population distribution sample mean and sample standard deviations were 20 and 32, respecti A 90% tion interval for a single observation selected from the same population is a. 201 424 b, 20 t 6.152 e. 20 7592 d..
11. Indicate whether each of the following is an example of a sample with replacement and which is a sample without replacement.
11a. Five friends go to a livery stable and select five horses to ride (each friend must choose a different horse).
11b..
11. A random variable X follows a continuous distribution, which is symmetric to 0.
If P(X -2)= 0.2 , then which of the following statements are true? Please justify your answer.
(a)P(X2)=0.8
(b)P(X2)=0.2
(c)P(X-3)0.8
(d)P(X2)+.
10. A pollster reports, with 95 percent confidence, that between 55 and 61 percent of all Americans favor mandatory drug testings for employees in positions of public trust (bus drivers, airline pilots, etc. The boundaries of this confidence interval (55 to 61 percent) suggest that
A) it.
11.12 Detecting gypsy moths. The gypsy moth is a serious threat to oak and aspen trees. A state agriculture department place traps throughout the state to detect the moths. When traps are checked periodically, the mean number of moths trapped is only 0.5, but some traps have several moths. The.
10.2.6 E Question Help For a sample of eight bears, researchers measured the distances around the bears chests and weighed the bears. Minitab was used to find that the value of the linear correlation coefficient is r 0.958. Using 0.05. determine if there is a linear correlation between chest size.
(10 points Q16. The annual salary for a sample of 500 part-time worker s is normally unskilled distributed with a mean of$30,000 and a standard deviation of a. The salary range that separates the top 25% from the lower 75% is b. The number of students who earned more than.
10.2 An experimenter has prepared a drug dosage level that she claims will induce sleep for 80% of people suffering from insomnia. After examining the dosage, we feel that her claims regarding the effectiveness of the dosage are inflated. In an attempt to disprove her claim, we administer her prescribed.
10.A group of 100 students was surveyed about their interest in a new International Studies program. Interest was measured in terms of high, medium, or low. 11 students responded high interest; 44 students responded medium interest; 45 students responded low interest. What is the relative frequency of students with high.
10:14 AM o 34% moodle-2015-2016.calstatela.edu Answer the same five questions for each of the experiments described below: 1. What is the null hypothesis? 2. What is the research hypothesis? 3. What would be the Type Ierror? 4. What would be the Type II error? 5. What is the probability of.
10.6 The quality control engineer for a furniture manufacturer is interested in the mean amount of force necessary to produce cracks in stressed oak furniture. She performs a two-tail test of the null hypothesis that the mean for the stressed oak furniture is 650. The calculated value of the Z.
1000 students are randomly assigned to one of two classrooms. How many seats should each classroom have so that with 99% probability each student has a seat?.
10.38 Beer and blood alcohol. How well does the number of beers a student drinks predict his or her blood alcohol content (BAC)? Sixteen student volunteers at Ohio State University drank a randomly assigned number of 12-ounce cans of beer. Thirty minutes later, a police officer measured their BAC.^16 The.
106. Suppose that a committee is studying whether or not there is waste of time in our judicial system. It is interested in the mean amount of time individuals waste at the courthouse waiting to be called for jury duty. The committee randomly surveyed 81 people who recently served as.
11. As the sample size increases, the standard error also increases.
True
False
14. If samples are selected from a normal population, the distribution of sample means will also be normal.
True
False.
11 percent of people in a city eligible to donate blood actually do. You randomly select four eligible blood donors and ask them if they donate blood. Complete parts (a) through (d) below.
(a) Find the mean of the binomial distribution.
(b) Find the.
(10 pts) Two parts re assembled as shown in the figure. The distributions of x1 and x2 are normal with 45.a. 0.25, Au2 44.7 a2 0.3. The specifications of the clearance between the mating parts are 0.4 t 0.3- What fraction of assemblies will fail to meet specifications if assembly.
11. Grab Bags A convenience store has made up 20 grab bag gifts and is offering them for $2.00 a bag. Ten bags contain merchandise worth $1.00. Six bags contain mer- chandise worth $2.00, and four bags contain merchan dise worth $3.00. Suppose you purchase one bag. What is your.
10. value 10.00 points One of the music industry's most pressing questions is: Can paid download stores contend nose-to-nose with free peer-to-peer download services? Data gathered over the last 12 months show Apple's iTunes was used by an average of 1.86 million households with a sample standard deviation of .52.
10. Use the Excel Regression tool to run a regression analysis using salary as the dependent variable and age as the independent variable. Interpret each of the following regression statistics: multiple R, R Square and standard error. State the hypotheses for the F-test. Explain how the P-value for the F-test.
10.3-2) Suppose IQ scores were obtained from randomly selected couples. For 20 such pairs of people, the linear correlation coefficient is 0.915 and the equation of the regression line is Y^=11.55+1.12x, where x represents the IQ score of the husband. Also, the 20 x values have a mean of 97.1.
11. A real estate company is interested in determining how long a property stays on the housing market before it gets sold. For a sample of 800 houses, they get the following table that summarizes the length of stay on the market and the house’s listed price.
.
11. Dr. Browns office hour is from 2:00 to 4:00 every Monday. Students arrive at his office according to a Poisson distribution at a mean rate of 4 per hour. What is the probability that the next student will arrive within 20 minutes? a. 0.2636 b. 0.4866 c. 0.5000 d..
106. The probability that a one-car accident is due to faulty brakes is 0.04, the probability that a one-car accident is correctly attributed to faulty brakes is 0.82, and the probability that a one-car accident is incorrectly attributed to faulty brakes is 0.03. What is the probability that (a) a.
(10) Suppose that, on average, 3 telemarketers call your house during a 7-day period. What is the probability that no telemarketer call your house on a given day? Assume that the number of telemarketers per day follow:s Poisson distribution (11) Suppose that, during a given week, 5,000, 000 people play.
11.13 A management consulting company presents a three-day seminar on project management to various clients. The seminar is basically the same each time it is given. However, sometimes it is presented to high-level managers, sometimes to midlevel managers, and sometimes to low-level managers. The seminar facilitators believe evaluations of the.
(10) There is a state fair game called Milk Can that was popular in the last century. The player is given three attempts to toss a softball into a 10-gallon metal milk can from a line six feet from the can. Suppose the probablity of a ball getting into the.
10. A 90% confidence interval for a situation is developed and is given as follows: 36 (a) Give the value of the sample mean that was used in de oping this interval. (b) Give the value of the margin of emor that was used in developing this interval 11. Calculate.
100 Public Health and Nutrition Many restaurants are now offering "healthy" items on their menus. Research suggests that these items may increase sales and profits because more Americans claim to be eating healthier foods. In a recent survey by the NPD Group, only 25% of adults say they eat healthy.
10. A card is selected from a standard card deck. Find the probability that the card is a face card or a heart. 11. A die is rolled. Find the probability of rolling a 6 or an odd number. 12. Three events are not mutually exclusive. Find P(A or B.
10. Consider the following times to failure in hundreds of hours of ten systems placed in service under same
conditions. The experimenter decided to terminate the experiment after 2900 hr:
15, 17, 20, 21, 23, 26, 28, 29+, 29+, 29+
Fit.
102 A 2002 survey by the American Pet Product American Manufacturers Association estimated that the average number of ferrets in ferret- owning households nationwide was 1.9. a. What was apparently the sample mean number of ferrets found by the survey? b. What additional information would be needed in order to.
11% D Wed 6:57 PM mathxl.com 17Fmath1303e01crn10695 Kendra Lang Homework: 6.3 and 6.4 Sampling Distributions and Estimators 10/18/17 6:56 PM Score: 0 of 1 pt 7 of 10 (8 6.4.16-T Score: 63%, 6.3 of 10 p The weights of a certain brand of candies are normaly distributed with a mean.
11 A large college class is graded on a total points system. The total points g in s semester by the students in the class vary normally with a mesta of 6Ts standard deviation of 50. Another large class in a different department is on a to 100 scale. The.
10:38 AM ooooo Verizon LTE webassign.net points Privterastats2 15E 019 My Notes A researcher measures the relationship between sleep medication use (times used per week) and time spent working (in hours per week). Answer the following questions based on the results provided sleep Medication use Time Sp Part (a) Compute.
11. A researcher studies the effect of cognitive psychotherapy on positive self-regard. The number of positive statements made about oneself is recorded for each participant during the first meeting. After eight weekly therapy sessions, the measures are repeated for each person. For the following data, determine whether there is a.
