Question

- State the null and alternate hypothesis.
- Will you use a left tail, right tail or 2 tailed test?
- Identify the sampling distribution to be used: standard normal, Student’s t or chi squared.
- Find the value of the test statistic.
- Find the P-Valu
- Based on your answers, shall we reject or accept the null hypothesis?
- Write the conclusion in the context of the problem.
Flying time on an old route between 2 cities has a mean
value of =5.25 hours with standard deviation is =0.6
hours. There are 36 flights on a new route where
the mean is hours. Does this indicate that the average
flying time for the new route is
**less than**5.25 hours? Use a 5% level of significance.

there was no sample mean provided.

Answer #1

Flying time on an old route between 2 cities has a mean value of
=5.25 hours with standard deviation is =0.6 hours. There are 36
flights on a new route where the mean is hours. Does this indicate
that the average flying time for the new route is less
than 5.25 hours? Use a 5% level of significance.
State the null and alternate hypothesis.
Will you use a left tail, right tail or 2 tailed test?
Identify the sampling distribution...

describe the null hypothesis and alternate hypothesis and say
whether the hypothesis test is two-tailed, left-tailed, or
right-tailed, then conduct the test and state the proper
conclusion. You must show the details of your calculations.
Specific Electric Company makes a circuit that is advertised to
initiate an alarm if the power supplied to a machine reaches 100
volts. A random sample of 250 switches is tested and the mean
voltage at which the alarm occurs is 98 volts with a...

A systems specialist has studied the workflow of clerks all
doing the same inventory work. Based on this study, she designed a
new workflow layout for the inventory system. To compare the
average production for the old and new methods, a random sample of
6 clerks was used. The average production rate (number of inventory
items processed) for each clerk was measures both before and after
the new system was introduced. The results are shown below. Test
the claim that...

19. For each of the following
claims
i) State the Null Hypothesis H0 and
the Alternate Hypothesis HA
ii) Indicate which is the claim.
iii) Determine whether the reject
region is left-tailed, right-tailed or two-tailed.
a) A consumer magazine reports that
the mean life of a dot-matrix printer is at least 3.5 years.
b) A realtor claims that rent for
studio apartments in new buildings in Brooklyn cannot be $1500 a
month.
c) A car dealer announces that the
mean...

We have a left tail one sample test for the population mean.
Assume the null hypothesis is true. Use 4% for the significance
level. The sample size is 27, the sample mean is 32.8, the sample
standard deviation is 4.1, and the null mean is 35.
The test result is (a) a correct decision (b) a Type I error (c)
a Type II error 3.
The test statistic value for the previous problem is

Find:
a) State the Null and Alternate Hypothesis.
b) Find the critical value(s) and sketch the critical
region.
c) Calculate the test statistic and show where it falls on
your sketch.
d) Make your decision and answer any question posed in the
problem.
In order to decide between two
locations to construct a gas station, the company kept a count of
cars passing by each location for the next 11 hours. The mean
number of cars passing Location 1 each...

a) Identify the claim: state the null and alternative
hypotheses. b) Determine the test: left-tailed, right-tailed, or
two-tailed. c) Identify the degree of freedom and determine the
critical value. d) Graph your bell-shaped curve and label the
critical value. e) Find your standardized test statistic ? and
label it on your graph. f) Decide whether to reject or fail to
reject the null hypothesis. g) Interpret your result.
A dealership projected that the mean waiting time at a
dealership is...

a) Identify the claim: state the null and alternative
hypotheses. b) Determine the test: left-tailed, right-tailed, or
two-tailed. c) Graph your bell-shaped curve and label your levels
of significance or critical value. d) Find your standardized test
statistic ? and label it on your graph. e) Decide whether to reject
or fail to reject the null hypothesis. f) Interpret your
result.
A study was conducted to determine if the salaries of elementary
school teachers from two neighboring states were equal....

When testing a null hypothesis that the population correlation
is 0, do you use a 1 or 2 tailed critical value if the sample r is
-0.19.
Update - Determining if there is a statistically significant
correlation between parental behaviour and self-esteem
N=
713 r = -0.19
X variable – parental control
Y variable – student’s self esteem
T statistic for testing Ho: ρ = 0
T= r √n-2 / √1-r2 = -0.19 √711 / √1-(-0.19)
2 = -...

For this problem, please do all 5-Steps: 1. State Null,
Alternate Hypothesis, Type of test, & Level of significance. 2.
Check the conditions. 3. Compute the sample test statistic, draw a
picture and find the P-value. 4. State the conclusion about the
Null Hypothesis. 5. Interpret the conclusion. A car insurance
company has determined that the mean annual car insurance cost for
a family in the town of Watlington is $1716. A researcher wants to
perform a hypothesis test to...

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