A safety administration conducted crash tests of child booster seats for cars. Listed below are results from those tests, with the measurements given in hic (standard head injury condition units). The safety requirement is that the hic measurement should be less than 1000 hic. Use a 0.05 significance level to test the claim that the sample is from a population with a mean less than 1000 hic. Do the results suggest that all of the child booster seats meet the specified requirement? 670 603 1014 534 501 662 What are the hypotheses? . H μ< 100 hic O B. Ho: H= 1000 hic Hi: με 1000 hic Η: μ< 1000 hic OD. Ho: H = 1000 hic OC. Họ: u> 1000 hic Hi μ< 1000 hic Hi με 1000 hic What is the test statistic? Z = (Round to two decimal places as needed.) What is the P-value? P-value = (Round to four decimal places as needed.) State the final conclusion that addresses the original claim. - ( fail to reject/reject ) HO. There is _( sufficient/not sufficient) evidence to support the claim that the sample is from a population with a mean less than 1000 hic. What do the results suggest about the child booster seats meeting the specified requirement? A.There is not strong evidence that the mean is less than 1000hic, and one of the booster seats has a measurement that is greater than 1000 hic. B. The results are inconclusive regarding whether one of the booster seats could have a measurement that is greater than 1000 hic. C.There is strong evidence that the mean is less than 1000 hic, but one of the booster seats has a measurement that is greater than 1000 hic. D. The requirement is met since most sample measurements are less than 1000 hic

The mean value of land and buildings per acre from a sample of farmers is $1500, with a standard derivation of $100. The data set has bell-shaped distribution. Using the empirical rule, determine which of the following farms, whose land and building values per acre are given, are unusual (more than two standards derivations from the mean). Are any of data values very unusual (more then three standard derivations from the mean)? $1357 $1719 $1316 $1176 $1598 $1491

we look at a random sample of 1000 united flights in the month of December comparing the actual arrival time to the scheduled arrive time. computer  output of the descriptive statistics for the difference in actual and expected arrival time of these 1000 flights are shown below : N=1000 Mean =4.06  St Dev. = 45.4  SE Mean =1.44  Min= -35  Q1 = -14  Median = -5  Q3 =9  Max =871  what is the sample mean difference in actual and expected arrival times?  what is the standard deviation of the difference ? x bar =      and s=    ?

The Bureau of Alcohol, Tobacco, and Firearms (BATF) has been concerned about lead levelsin California wines. In a previous testing of wine specimens, lead levels ranging from 50 to 700parts per billion were recorded. How many wine specimens (at the least) should be tested if theBATF wishes to estimate the mean lead level for California wines to within 10 parts per billionwith 95% confidence?

A hypertensions trial is mounted and 12 participants are randomly assigned to receive either a new medication or a placebo. Each participant takes assigned medication and their systolic blood pressure (SBP) is recorded after 6 months on the assigned medication the data are shown in table 7-9 is there a difference in the mean SBP between treatment? Run the appropriate test at a =0.05

i need C and D

7

Use technology to help you test the claim about the population mean, u, at the given level of significance, a, using the given sample statistics. Assume the population is normally distributed Claim: 1180; a=0.06: a202.19. Sample statistics x= 1208.77, n=300 Identify the null and alternative hypotheses. Choose the correct answer below. OA H 1208.77 H1208.77 OC. H₂>1208.77 H:Hs 1208.77 OE H:1208.77 H₂>1208.77 Calculate the standardized test statistic The standardized test statistic in (Round to two decimal places as needed) Determine the P-value P= (Round to three decimal places as needed.) Determine the outcome and conclusion of the test Ho. At the 6% significance level, there enough evidence to OB. Hop21180 H₂1180 OD. Hus 1180 H₂>1180 OF H₂1180 Hps 1180 the claim