![McSporter](/avatars/40000.jpg)
McSporter
29.11.2019 •
Mathematics
An appliance manufacturer claims to have developed a compact microwave oven that consumes a mean of no more than 250 w. from previous studies, it is believed that power consumption for microwave ovens is normally distributed with a population standard deviation of 15 w. a consumer group has decided to try to discover if the claim appears true. they take a sample of 20 microwave ovens and find that they consume a mean of 257.3 w. what is the critical value with a level of significance of 0.05 and what is the test statistic and what is the p value?
Solved
Show answers
More tips
- W Work and Career 10 Best Ways To Find A Job: Tips To Land Your Dream Job...
- L Leisure and Entertainment How to Choose a Program for Cutting Music?...
- A Auto and Moto How to choose the right drive for your BMW...
- L Leisure and Entertainment How to Choose the Perfect Gift for Men on February 23rd?...
- H Health and Medicine How to Treat Whooping Cough in Children?...
- H Health and Medicine Simple Ways to Lower Cholesterol in the Blood: Tips and Tricks...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
- S Style and Beauty Intimate Haircut: The Reasons, Popularity, and Risks...
- A Art and Culture When Will Eurovision 2011 Take Place?...
Answers on questions: Mathematics
- M Mathematics Find the surface area of the cone. Use 3.14 for pi. Round to the nearest whole number...
- M Mathematics Welp, ya know the drill lol,...
- M Mathematics Answer to this puzzle...
- M Mathematics Please help ASAP!! the question is in the photo...
- M Mathematics I ned to anser thiz to pazz pleaz hellp yu uze 1300 / 13 to help yu find 1287 / 13 WIL GIV BRANLIST...
- M Mathematics Bless your eyes with a picture of Kakashi You can’t tell me he’s not hot!!...
- M Mathematics Based on this sample, is there convincing evidence that the true mean age of millionaires in the US is less than 62 years old? Use = 0.01. Provide statistical evidence to support...
- M Mathematics Daniel and Alice each earn money by babysitting. Daniel earned a total of $84 in a 5-week period. During a 6-week period, Alice averaged $16 per week. How much will Daniel have...
- M Mathematics PLLSSS REALLY URGENT If g(x)=3x+4, determine n that g(-3)=g^-1(n)....
- M Mathematics A hemisphere has an area of the base which is 64π squared inches. What is its surface area and its volume?...
Ответ:
Critical value zc=1.64
Step-by-step explanation:
1) Data given and notation
z would represent the statistic (variable of interest)
State the null and alternative hypotheses.
We need to conduct a hypothesis in order to determine if the compact microwave oven consumes a mean of no more than 250 W:
Null hypothesis:
Alternative hypothesis:
We know the population deviation, so for this case is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:
z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".
Calculate the statistic
We can replace in formula (1) the info given like this:
Calculate the critical value
The critical value for this case would be :
The value of a that satisfy this on the normal standard distribution is a=1.64 and would be the critical value on this case zc=1.64.
Calculate the P-value
Since is a one-side upper test the p value would be:
Conclusion
If we compare the p value and the significance level given
we see that
so we can conclude that we reject the null hypothesis, and the the actual mean of comsumption for the compact microwave oven seems to be higher than 250W.
Ответ:
D
Step-by-step explanation:
D = 9 + 6x
D = 6x + 9
6x + 9
9 more than the product of 6 and x,...
Hope it helped,... Chow,...!