Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Signatures to a petition were collected on 676 sheets. Each sheet has enough space for 42 signatures, but on many sheets a smaller number of signatures was collected. The number of signatures per sheet were counted on a random sample of 50 sheets. The results are given below:
Number of signatures
42
41
36
32
29
27
23
19
16
15
Frequency
4
1
2
14
11
10
9
7
6
5
3
Total
50
a) Give an 80% confidence interval for the total number of signatures.
b) How (if at all) does the non-normality of the Number of signatures (with a greatest frequency at the upper end - 42) affect your answer?
c). After the sample in the Table of question 1 was taken, the total number of completely filled sheets (with 42 signatures each) was counted and found to be 326 (out of the total of 676). Use this infornmation to improve your estimate of the total number of signatures and find a standard error to that estimate.
Given an infinite population with a mean of 75 and a standard deviation of 12, the probability that the mean of a sample of 36 observations, taken at random from this population
A manufacturer of computers claims its batteries last an average of 3.5 hours before needing recharging. For a sample of 10 batteries, the mean life was 3 hours and the standard deviation
Assuming that the two job offers are independent of each other, what is the probability that the applicant gets an offer from both companies?
The following table is from the Social Security Actuarial Tables. For each age, it gives the probability of death within one year, the number of living out of an original 100,000 and the additional life expectancy for a person of that age.
test at the 0.01 level, was the mean time for the Delta visits significantly less than that for the British Airway visits? Identify and interpret the p-value for the test.
Surveys 32 currents students discovering that 12 will return for summer school. b. with a 0.95 probability, how large of a sample would have to be taken to provide a margin of error of 3% or less?
What is the probability that the birth weight of a randomly selected baby of this type:
Why can you not have a z- score equaling 0/0 ? what is problematic with calcutlating a z-score for a data set of repeated entries?
A sample of 64 account balances from a credit card company showed an average balance of $1,040. A previously determined population standard deviation is $200.
Sun Microsystems has approximately 50% of the high-end Unix machines market with its closest competitor being IBM. Suppose that 15 firms were in the market to purchase a high-end Unix machine. Assume that these firms listened to sales pitches by a..
What is the probability that 25% or fewer male employees will indicate that they have to pick up the slack for moms working flextime?
For each of the following two scenarios/descriptions (pp.2), please select two responses, one to indicate the most appropriate test of inference
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd