Kindly asnwer this 2 questions asap. Thank you A random sample of 75 college students of MSU is selected and 16 arefound to have motorcycles on campus. Use a 95% confidence interval toestimate the fraction of students who have motorcycles on campus. A study was made to estimate the difference in salaries of high schoolteachers in the private and public schools in BARMM. A random sample of100 teachers in private schools showed an average Php 15.000 with astandard deviation of Php 2,000. A random sample of 200 teachers inpublic schools of Php 24,000 with standard deviation of Php 1,200. Find a98% confidence interval for the difference between the average salariesof teachers in private and public schools of BARMM.

As per our guidelines we are suppose to answer only one question Givensample size(n)=75no.of…

Answered: A random sample of 75 college students…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 7PPS

See similar textbooks

Similar questions

A sample of 37 inchworms in Cititon Park was collected and measured. Their lengths had a mean of 2.56 cm with a standard deviation of 0.09 cm. Find the 95% confidence interval for the mean length of all the inchworms in Cititon Park.
A study was made to estimate the difference in salaries of high school teachers in the private and public schools in BARMM. A random sample of 100 teachers in private schools showed an average Php 15,000 with a standard deviation of Php 2,000. A random sample of 200 teachers in public schools of Php 24,000 with standard deviation of Php 1,200. Find a 98% confidence interval for the difference between the average salaries of teachers in private and public schools of BARMM.
Do the data for 300 exams suggest a significant deviation from what Professor X’s distribution has been all along?
A sample of 150 Samsung phone batteries showed a mean lifetime of 1400 hours and a standard deviation of 120 hours. A sample of 200 i-phone batteries showed a mean lifetime of 1200 hours and a standard deviation of 80 hours. Find a 95% confidence interval for the difference of the mean lifetimes of the Samsung batteries and i-phone batteries.
A survey found that women`s heights are normally distributed with a mean of 62.7 inches and a standard deviation of 2.5 inches. The survey also found that men`s heights are normally distributed with a mean of 67.3 inches and a standard deviation of 3.1 inches. Most of the live characters employed at an amusement park have height requirements of a minimum of 56 inches. and a maximum of 63 inches. a) Find the percentage of men meeting the height requirement. Round to 2 decimal places if needed.
The mean and standard deviation of system blood pressure of 200 employees in a factory were 127mmhg and 13 mmHg respectively. Calculate and interprete the 95% confidence interval of systolic blood pressure of the employees
According to a report published by the USDA 3 years ago, a typical American consumes an average of 26 pounds of ice cream per year. A researcher at the USDA would like to determine if the average amount of ice cream consumed each year by a typical American has changed since the original report was published. The researcher collected data from a random sample of 65 Americans and found that the mean amount of ice cream consumed each year by the sample was 25.54 pounds with a standard deviation of 1.64 pounds. Using α=0.02, test the hypothesis that the mean amount of ice cream consumed each year by a typical American is different than 26 pounds. Use the p-value method. State the null and alternative hypothesis for this test. H0= H1= Determine the test statistic for the hypothesis test. Round the solution to four decimal places. =
Researchers conducted a study to investigate whether there is a difference in mean PEF in children with chronic bronchitis as compared to those without. Data on PEF were collected from 100 children with chronic bronchitis and 100 children without chronic bronchitis. The mean PEF for children with chronic bronchitis was 290 with a standard deviation of 64, while the mean PEF for children without chronic bronchitis was 308 with a standard deviation of 77. Based on the data, is there statistical evidence of a lower mean PEF in children with chronic bronchitis as compared to those without? Run the appropriate test at α=0.05. Assume equal variances. 1) the appropriate null and alternative hypotheses; 2) the appropriate test; 3) the decision rule; 4) the calculation of the test statistic; and 5) your conclusion including a comparison to alpha or the critical value.
According to a leasing firm's reports, the mean number of miles driven annually in its leased cars is miles with a standard deviation of miles. The company recently starting using new contracts which require customers to have the cars serviced at their own expense. The company's owner believes the mean number of miles driven annually under the new contracts, , is less than miles. He takes a random sample of cars under the new contracts. The cars in the sample had a mean of annual miles driven. Assume that the population is normally distributed. Is there support for the claim, at the level of significance, that the population mean number of miles driven annually by cars under the new contracts, is less than miles? Assume that the population standard deviation of miles driven annually was not affected by the change to the contracts. Perform a one-tailed test. Then answer the questions below.Carry your intermediate computations to three or more decimal places, and round your responses…
A professor in the women’s studies program believes that the amount of smoking by women has increased in recent years. A complete census taken 2 years ago of women living in a neighbourng city showed that the mean number of cigarettes smoked daily by the women was 5.0 with a standard deviation of 2.2. To assess her belief, the professor determined the daily smoking rate of random sample of 121 women currently living in that city. The data show that the number of cigarettes smoked daily by the 121 women has a mean of 6.1 and a standard deviation of 2.7. Is the professor’s belief correct? Assume a directional alternative hypothesis is appropriate and use an alpha = to 0.051-tailed in making your decision. Be sure that the most sensitive test is used to analyze the data. Assume the population standard deviation is unknown and reanalyze the data using the same alpha level. What is your conclusion this time? Determine the size of effect found in part b and provide an interpretation…
The head of the Philippine University (PU) observes a decline on the alcoholic expenditures of learners from a monthly expenditure of Php 350 pesos in the previous year. To check on this, he randomly selected 10 PU learners who drink alcoholic beverages and asked the amount, in pesos, that they usually spend on alcoholic beverages in a month. It is known that the usual amount spent on alcoholic beverages by learners who drink alcoholic beverages follows the normal distribution with standard deviation of Php 10. The data collected are: 400, 235, 200, 250, 200, 300, 500, 430, 420, and 220. 1. Construct and interpret a 95% confidence interval for the true mean amount spent by the learners on alcoholic beverages. 2. Find a 90% confidence interval for the true mean amount spent by the learners on alcoholic beverages. 3. Calculate the widths of the confidence intervals in (a) and (b). How was the width of the confidence interval affected by the decrease in the confidence coefficient holding…
To estimate the average salary of policemen, 64 of them were taken as samples. If the mean salary of these samples is Php. 25,000 with standard deviation of Php. 800, construct a 90% confidence interval estimate for the average salary of all policemen.

Recommended textbooks for you

Glencoe Algebra 1, Student Edition, 9780079039897…

Algebra

ISBN:

9780079039897

Author:

Carter

Publisher:

McGraw Hill

Calculus For The Life Sciences

Calculus

ISBN:

9780321964038

Author:

GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Publisher:

Pearson Addison Wesley,

Glencoe Algebra 1, Student Edition, 9780079039897…

Algebra

ISBN:

9780079039897

Author:

Carter

Publisher:

McGraw Hill

Calculus For The Life Sciences

Calculus

ISBN:

9780321964038

Author:

GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Publisher:

Pearson Addison Wesley,

SEE MORE TEXTBOOKS

A random sample of 75 college students of MSU is selected and 16 are found to have motorcycles on campus. Use a 95% confidence interval to estimate the fraction of students who have motorcycles on campus.