The weekly sales of an electrical shop are distributed normally with a standarddeviation of RM900. A statistical study of sales in the last nine weeks has founda confidence interval for the mean of weekly sales of (RM4663, RM5839). Findthe confidence level for this interval.

In question, We have given the standard deviation of RM900 and sample size of 9 with confidence…

Answered: The weekly sales of an electrical shop…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

An advertising agency that serves a job radio station wants to estimate the mean amount of time that the station's audience spends listening to the radio daily. From past studies, the standard deviation is estimated as 45 minutes. What sample size is needed if the agency wants to be 90% confident of being correct to within +/-5 minutes?
The mean score of a class of 30 students in their math test is 6.267. The standard deviation is 1.9 and at 95% confidence, the class interval was found to be CI = (5.587, 6.947). If the passing score is 7.5, did the class passed the test?
The mean lifetime of a certain brand of AAA battery is 120 hours with a standard deviation of 15 hours. If the Z-score of a battery is -0.6, how long did the battery last?
What relation exists between the average deviation of the mean?
A man measures his heart rate before using a treadmill and then after walking ona treadmill for 10 minutes on 7 separate days. His mean heart rate at baseline and10 minutes after treadmill walking is 85 and 93 beats per minute (bpm), respectively. The mean change from baseline to 10 minutes is 8 bpm with a standarddeviation of 6 bpm.(a) What test can we use to compare pre- and post-treadmill heart rate?(b) Implement the test in 2a, and report a two-tailedp-value.(c) Provide a 90% confidence interval (CI) for the mean change in heart rate afterusing the treadmill for 10 minutes.(d) What is your overall conclusion concerning the data? this is a review question of ch8 bernard rosner. the solution is not provided at bartleby for this review question
A recent study found that pregnancy length for single-baby child births is approximately normally distributed with a mean of 266 days and a standard deviation of 16 days. Find the percentage of single-birth babies that will be born at less than 250 days gestation.
The mean score on a driving exam for a group of driver's education students is 6868 points, with a standard deviation of 55 points. Apply Chebychev's Theorem to the data using kequals=22. Interpret the results
The standard deviation of pulse rates of adult males is less than 10 bpm. For a random sample of 144 adult males, the pulse rates have a standard deviation of 9.1 bpm. Find the value of the test statistic.
The mean score in miss smiths 4th grade class was 76, with a standard deviation of 7. Assume the grades are normally distributed and use the empirical rule to find the approximate percentage of students who scored above 83.
From generation to generation, the mean age when smokers first start to smoke varies. However, the standard deviation of the age when smokers first start to smoke remains constant at around 2.1 years. The American Lung Association claims that the mean age when smokers first start to smoke is at least 17. A survey of 40 randomly selected smokers of this generation was done and it was found that the mean age when smokers first started to smoke was 18.1. Is there enough evidence to reject the claim? Describe what a Type I error is for this situation. Describe what a Type II error is for this situation.
An advertising agency that serves a major radio station wants to estimate the mean amount of time that the station’s audience spends listening to the radio daily. From past studies, the standard deviation is estimated as 45 minutes. What sample size is needed if the agency wants to be 99% confident of being correct to within ±5 minutes?
Among 157 Cuban American men ,the mean systolic blood pressure was 146 mm Hg with a standard deviation of 27. We wish to know if based on these data, we may conclude that the mean systolic blood pressure for a population of Cuban American is greater than 140. Use α=0.01 (solve without excel) , show work

Recommended textbooks for you

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

SEE MORE TEXTBOOKS

The weekly sales of an electrical shop are distributed normally with a standard deviation of RM900. A statistical study of sales in the last nine weeks has found a confidence interval for the mean of weekly sales of (RM4663, RM5839). Find the confidence level for this interval.