Suppose a professional golfing association requires that the standard deviation of the diameter of a golf ball be less than 0.005 inch. Determine whether these golf balls conform to this requirement at the a=0.01 level of significance. Assume that the population is normally distributed. What are the correct hypotheses for this test? The null hypothesis is H.: The alternative hypothesis is H₁: ample Get more help. *** Clear all 1.678 1.681 1.684 1.679 1.684 1.678 1.684 1.684 1.684 1.677 1.682 1.677 Chackensve

65 homeless people in San Jose were asked their age. The sample mean age was 33.2 years. Let x be a random variable representing ages of homeless people in San Jose. Assume that x has a normal distribution and o = 7.3 years. Do the data indicate that the mean age of the population of homeless people in San Jose is less than 35 years old? Use a = 0.05. Identify the following in your answer. 1. Identify the null hypothesis Ho and alternate hypotheses H, for the problem. 2. Identify the sample statistic, test statistic, p-value and calculator key used: Sample Statistic (sample mean) (Stated in problem) = Test Statistic (z) (Round to two decimal places) %3D P-value: (Round to four decimal places) = Calculator key used: 3. Identify the significance level and determine if you reject or fail to reject the null hypothesis. significance level = Do you reject or fail to reject Ho ? 4. State your conclusion. Upload your answer. Remember you can only upload one document. Upload Choose a File

This assignment is worth 1 points. The extra point will be added to your overall course grade. For example: if you receive an 88% in the course you can receive up to 1 point giving you a new score of 89%. The following rubric will be used.  0.25 point for drawing the normal distribution curve with the mean value labeled on the curve and the appropriate area shaded. 0.25 point for determining the value of the standard deviation of the sample mean.  0.5 point for finding the correct probability.   All work must be shown in order to receive any credit.  Please upload your completed assignment here.    The length of time taken on the SAT for a group of students is normally distributed with a mean of 2.5 hours and a standard deviation of 0.25 hours. A sample size of n = 60 is drawn randomly from the population. Find the probability that the sample mean is between two hours and three hours.

Assume that Christmas trees sold in a farm have heights that are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches. Find the value of the quartile Q3 (75% of trees are shorter than this height). 65.3 inches 64.3 inches 66.1 inches O 67.8 inches

The percent of fat calories that a person in America consumes each day is normally distributed with a mean of about 38 and a standard deviation of 9. Suppose that one individual is randomly chosen. Let X-percent of fat calories. a. What is the distribution of X? X - N( 38 9 or or b. Find the probability that a randomly selected fat calorie percent is more than 45. Round to 4 decimal places. c. Find the minimum number for the upper quartile of fat calories. Round to 2 decimal places.

THE ANSWER IS NOT 2.02!!!!

The mean annual tuition and fees for  a sample of 14 private colleges in California was $37,900 witrh a standard deviation of $7,200. A dotplot shows that it is reasonable to assume that the population is approxiamately normal. Can you conclude that the mean tuition and fees for private institutions in California differs from $35,000? a. State the null and alternate hypothesis. b. Compute the value of the t statistic. How many degrees of fredom are there?

14.1   IQ is normally distributed with a mean of 100 and a standard deviation of 15. Suppose one individual is randomly chosen. Let X = IQ of an individual. Find the probability that the person has an IQ greater than 120. To 2 decimal places Answer:  MENSA is an organization whose members have the top 2% of all IQs. Find the minimum IQ needed to qualify for the MENSA organization. Round to nearest whole number. Answer:  The middle 50% of IQs fall between what two values? Round to nearest whole number. Answer: ,

= A population of values has a normal distribution with u random sample of size n 212. What is the mean of the distribution of sample means? fx = 6.8 and o 53.6. You intend to draw a What is the standard deviation of the distribution of sample means? (Report answer accurate to 2 decimal places.) ox = Calculator