solution

 

. Your company sells exercise clothing and equipment on the Internet. To design the clothing, you collect data on the physical characteristics of your different types of customers. Here are the weights for a sample of 24 male runners. Assume that these runners can be viewed as a random sample of your potential customers. The weights are expressed in kilograms. DATADATA

DATADATADATA

DATADATADATADATADATA

DATADATADATADATADATA

DATADATADATADATADATA

DATADATADATADATADATA

DATADATADATADATADATA

DATADATADATADATADATA

DATADATADATA

DATADATADATADATADATA

DATA FILE

CLOTHING

68.7    61.8    63.2$1rn  53.1$1rn  62.3$1rn 59.7$1rn 55.4$1rn 58.9$1rn   60.9$1rn  69.2$1rn   63.7$1rn   67.8

65.6$1rn 65.5   56.0$1rn 57.8$1rn  66.0$1rn  62.9$1rn 53.6    65.0$1rn    55.8$1rn    60.4$1rn  69.3$1rn  62.1

Exercise 6.24 (page 350) asks you to find a 95% confidence interval for the mean weight of the population of all such runners,

assuming that the population standard deviation is σ = 4.5 kg.

(a) Give the confidence interval from that exercise, or calculate the interval if you did not do the exercise.

(b) Based on this confidence interval, does a test of

H0: μ = 61.3 kg

Ha: μ _= 61.3 kg

reject H0 at the 5% significance level?

(c) Would H0: μ = 63 be rejected at the 5% level if tested against a two-sided alternative?

 

 
"Looking for a Similar Assignment? Get Expert Help at an Amazing Discount!"
Looking for a Similar Assignment? Our Experts can help. Use the coupon code SAVE30 to get your first order at 30% off!