sodni3
2021-10-23
Answered

The time a patient must wait before being attended by a physician in a hospital has been observed for each of 100 randomly selected patients he sample mean is 70.3 minutes and the standard deviation is 28.2 minutes. Test the hypothesis that the mean waiting time in the hospital is not more than 65 minutes.

You can still ask an expert for help

Daphne Broadhurst

Answered 2021-10-24
Author has **109** answers

Step 1

Hypothesis Testing:

It is basically a comparison of the statistical measures of the data with one sample(population) or two samples(populations) or more than two samples(populations). There are two hypotheses namely NULL and ALTERNATIVE.

The tail of the hypothesis will be decided from the alternative hypothesis. If it is '<' then left tail; '>' then right tail;

As the sample size is more than 30, the testing of the hypothesis is Z-test.

One-Sample Z-Test:

It is the hypothesis testing done for comparing the mean of the data to a specific value. As the name says it is a one-sample t-test, the data of one sample is considered for the complete hypothesis testing and the test statistics will be found from that data.

Step 2

Here,

The level of significance is not mentioned so, it is considered to be the commonly used level of significance, that is

The test statistics

Step 3

The P-value of the Test statistics is

The P-value is less than the level of significance,

Therefore, there is sufficient evidence to reject the null hypothesis.

The mean waiting time in the hospital is less than 65 minutes. That is, the mean waiting time in the hospital is not more than 65 minutes.

asked 2021-03-02

In how many ways can 7 graduate students be assigned to 1 triple and 2 double hotel rooms during a conference

asked 2020-11-01

Solve the following problems applying Polya’s Four-Step Problem-Solving strategy.

If six people greet each other at a meeting by shaking hands with one another, how many handshakes take place?

If six people greet each other at a meeting by shaking hands with one another, how many handshakes take place?

asked 2021-01-30

To find: The probability of getting same number of men in two groups.

Given:

A group consists of 6 men and 6 women. Divide into groups 6 in each.

Given:

A group consists of 6 men and 6 women. Divide into groups 6 in each.

asked 2021-09-20

An online used car company sells second-hand cars. For 30 randomly selected transactions, the mean price is 2800 dollars.

a) Assuming a population standard deviation transaction prices of 130 dollars, obtain a$99\mathrm{\%}$ confidence interval for the mean price of all transactions.

b) Which of the following is the correct interpretation for your answer in part (a)?

A) If we repeat the study many times,$99\mathrm{\%}$ of the calculated confidence intervals will contain the mean price of all transactions.

B) There is a$99\mathrm{\%}$ change that the mean price of all transactions lies in the interval

C) We can be$99\mathrm{\%}$ confident that the mean price for this sample of 30 transactions lies in the interval

D) None of the above

a) Assuming a population standard deviation transaction prices of 130 dollars, obtain a

b) Which of the following is the correct interpretation for your answer in part (a)?

A) If we repeat the study many times,

B) There is a

C) We can be

D) None of the above

asked 2022-05-11

For the provided sample mean, sample size, and population standard deviation, complete parts (a) through (c) below.

x=32,

n=100,

σ=3

Part 1

**a. **Find a 95% confidence interval for the population mean.

asked 2021-01-31

For a population with a mean of $\mu =100$ and a standard deviation of $\sigma =20$ ,

Find the X values.

$z=-.50$ .

Find the X values.

asked 2021-05-02

What type of data are required for the construction of a scatterplot, and what does the scatterplot reveal about the data?