Trydint" bubble-gum company claims that 7 out of 10 people prefer their gum to "Eklypse". Test their claim at the 90 confidence level.

The null and alternative hypothesis in symbols would be:

H0:0.7

H1:>0.7

H0:p0.7

H1:p<0.7

H0:0.7

H1:<0.7

H0:=0.7

H1:0.7

H0:p=0.7

H1:p0.7

H0:p0.7

H1:p>0.7

The null hypothesis in words would be:

• The proportion of all people that prefer Trydint gum is 0.7
• The average of people that prefer Trydint gum is not 0.7.
• The proportion of people in a sample that prefers Trydint gum is 0.7.
• The proportion of all people that prefer Trydint gum is greater than 0.7.
• The proportion of people in a sample that prefer Trydint gum is not 0.7
• The average of people that prefer Trydint gum is 0.7.
• The proportion of all people that prefer Trydint gum is less than 0.7.

Based on a sample of 170 people, 115 said they prefer "Trydint" gum to "Eklypse".

The point estimate is:_____________ (to 3 decimals)

The 90 % confidence interval is: __________ to (to 3 decimals)

Based on this we:

• Fail to reject the null hypothesis
• Reject the null hypothesis