below the null value is x = 72.3? (Round your answer to two decima =ing α = 0.003? the P-value. (Round your test statistic to two decimal places and yo ext. here is sufficient evidence to conclude that the mean drying time is not sufficient evidence to conclude that the mean drying time is less here is not sufficient evidence to conclude that the mean drying time sufficient evidence to conclude that the mean drying time is less tha 3, what is (70)? (Round your answer to four decimal places.) is used, what n is necessary to ensure that (70) = 0.017? (Round yo 00, what is the probability of a type I error when = 76? (Round yo

Do the given data provide convincing evidence that the mean number of hours per day spent using electronic media was greater in 2009 than in 1999? Test the relevant hypotheses using a significance level of 0.01. (Use ?2009 − ?1999.) Find the test statistic. (Round your answer to two decimal places.) t =  Find the df. (Round your answer down to the nearest whole number.) df =   Use technology to find the P-value. (Round your answer to four decimal places.) P-value =    Construct and interpret a 98% confidence interval estimate of the difference between the mean number of hours per day spent using electronic media in 2009 and 1999. (Use ?2009 − ?1999. Round your answers to three decimal places.) (______,____)hours

K A company is developing a new high performance wax for cross country ski racing. In order to justify the price marketing wants, the wax needs to be very fast. Specifically, the mean time to finish their standard test course should be less than 55 seconds for a former Olympic champion. To test it, the champion will ski the course 8 times. The champion's times (selected at random) are 54.9, 63.7, 48.1, 53.9, 49.3, 47.4, 53.7, and 44.9 seconds to complete the test course. Should they market the wax? Assume the assumptions and conditions for appropriate hypothesis testing are met for the sample. Use 0.05 as the P-value cutoff level. Choose the correct null and alternative hypotheses below. Ο A. Ho:μ = 55 HAH55 Calculate the test statistic. ... t= OB. Ho:μ>55 HA:μ = 55 OD. Ho:μ<55 HAH=55 (Round to three decimal places as needed.) Calculate the P-value. P-value= (Round to four decimal places as needed.) Choose the correct clusion below. A. No, do not market the wax as there is insufficient…

Data from the National Association of Realtors indicates that mean price of a home in Denver,Colorado, in the first three months of 2018 was $255,300. We can write this as 255.3 with unitsof thousands of dollars for our calculations. A random sample of 60 homes sold in 2020 had amean price of 235 (thousand dollars). Assume the standard deviation s = 140 (thousand dollars).Can we conclude that the mean price in 2020 differs from the mean price in the first 3 months of2018? Use the α = 0.05 level of significance.Parameter_____________________________________________________________________Null hypothesis ____________________________________Alternative hypothesis ________________________________________This test is: One-sided Two-sidedTest statisticp-valueCircle a decision: Reject H0 Do not reject H0Conclusion: At the 0.05 level of significance, we ___________________ have sufficient evidenceto say that________________________

10. (S-AQ 11.45) To estimate the mean height µ of male students on your campus, you will measure an SRS of students. You know from government data that the standard deviation of the heights of young men is about 2.8 inches. You want your sample mean x to estimate p with an error of no more than one-half inch in either direction. What standard deviation (+0.0001) must x have so that 99.7% of all samples give an x within one-half inch of p? (Use the 68-95-99.7 rule)| How large an SRS do you need to reduce the standard deviation of x to the value you found in the previous part? eBook Hint Check Syntax

Professor Ramos has a packing plant in a machine packs carton with jars. A sales person claims that the machine she is selling will pack faster to test the claim the times It takes each machine to pack 10 cartons are recorded in seconds and the results are shown below population one new machine n=10 Mean =42.3 s=0.685 Present machine n=10 mean=43.23 S =0.750.Do the data provide significant evidence to conclude that on the average the new machine packs faster perform the required hypothesis test in the 5% level of significance assume the population standard deviation's are equal but unknown show all your steps setting up your null  and alternative hypothesis.

A researcher is to perform a hypothesis test for a single populaiton mean with null and alternative hypotheses given below. HoiH=100 Hail#100 The researcher collects a sample of size n= 157 with sample mean y= 1072 and sample standard deviation Calculate the p-value. s= 34.8. Answer as a decimal and not a percentage with accuracy to at least 4 decimal places.

Use the information given in the table below to find a 95% Prediction Interval for y when x = 10. n = 20 x_bar = 15 %3D beta0_hat = 53 SSXX = 62 beta1_hat = - 4.5 S = 9 (- 14.79, 30.79) (-0.57, 16.57) (-10.25, 26.25) O (- 4.73, 20.73)

You are performing a two-tailed test with test statistic z=−2.306, find the p-value accurate to 4 decimal places.p-value =

what raw score in needed to reach the 90th perentile? a group of students take a statistics exam where the average was m=90 and the standard deviation was SD = 7.8. answer with raw scores, z scores and what in particular you shaded when creating a curve and the final answer.