"Trydint" bubble-gum company claims that 4 out of 10 people prefer their gum to "Eklypse". Test their claim that it is different at the 95 confidence level. The null and alternative hypothesis in...


"Trydint" bubble-gum company claims that 4 out of 10 people prefer their gum to "Eklypse". Test their claim that it is different at the 95 confidence level.


The null and alternative hypothesis in symbols would be:


The null hypothesis in words would be:





  • The average of people that prefer Trydint gum is not 0.4.

  • The proportion of all people that prefer Trydint gum is 0.4

  • The proportion of all people that prefer Trydint gum is greater than 0.4.

  • The proportion of people in a sample that prefers Trydint gum is 0.4.

  • The proportion of all people that prefer Trydint gum is less than 0.4.

  • The average of people that prefer Trydint gum is 0.4.

  • The proportion of people in a sample that prefer Trydint gum is not 0.4

  • Based on a sample of 330 people, 119 said they prefer "Trydint" gum to "Eklypse".


    The point estimate is:  (to 4 decimal places)


    The 95 % confidence interval is:  to  (to 4 decimal places)


    Based on this we:


    • Fail to reject the null hypothesis

    • Reject the null hypothesis








Jun 04, 2022
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